/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:32:01,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:32:01,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:32:01,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:32:01,195 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-Separate.epf [2021-06-05 15:32:01,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:32:01,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:32:01,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:32:01,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:32:01,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:32:01,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:32:01,230 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:32:01,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:32:01,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:32:01,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:32:01,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:32:01,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:32:01,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:32:01,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:32:01,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:32:01,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:32:01,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:32:01,231 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:32:01,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:32:01,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:32:01,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:32:01,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:32:01,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:32:01,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:32:01,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:32:01,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:32:01,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:32:01,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:32:01,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:32:01,233 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:32:01,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:32:01,233 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:32:01,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:32:01,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:32:01,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:32:01,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:32:01,563 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:32:01,568 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:32:01,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-06-05 15:32:01,570 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-06-05 15:32:01,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:32:01,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:32:01,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:32:01,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:32:01,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:32:01,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:32:01,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:32:01,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:32:01,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:32:01,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/1) ... [2021-06-05 15:32:01,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:32:01,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:32:01,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:32:01,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:32:01,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (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 [2021-06-05 15:32:01,741 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:32:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:32:01,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:32:01,741 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:32:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:32:01,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:32:01,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:32:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:32:01,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:32:01,742 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:32:01,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:32:01,906 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:32:01,908 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:32:01 BoogieIcfgContainer [2021-06-05 15:32:01,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:32:01,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:32:01,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:32:01,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:32:01,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:32:01" (1/2) ... [2021-06-05 15:32:01,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e18efe3 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:32:01, skipping insertion in model container [2021-06-05 15:32:01,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:32:01" (2/2) ... [2021-06-05 15:32:01,914 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-06-05 15:32:01,935 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:32:01,935 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:32:01,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:32:01,936 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:32:01,980 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 15:32:02,002 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 15:32:02,018 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:32:02,018 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:32:02,018 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:32:02,018 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:32:02,018 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:32:02,018 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:32:02,019 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:32:02,019 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:32:02,026 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 15:32:02,036 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:32:02,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:02,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:02,056 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-06-05 15:32:02,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:02,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088951925] [2021-06-05 15:32:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:02,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:02,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088951925] [2021-06-05 15:32:02,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088951925] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:32:02,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:32:02,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:32:02,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443111315] [2021-06-05 15:32:02,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:32:02,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:32:02,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:32:02,237 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:02,283 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-05 15:32:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:32:02,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 15:32:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:02,291 INFO L225 Difference]: With dead ends: 43 [2021-06-05 15:32:02,292 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 15:32:02,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:32:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 15:32:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-05 15:32:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-05 15:32:02,332 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-05 15:32:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:02,333 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-05 15:32:02,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-05 15:32:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:32:02,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:02,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:02,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:32:02,336 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:02,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-06-05 15:32:02,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:02,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518302868] [2021-06-05 15:32:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:32:02,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:02,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518302868] [2021-06-05 15:32:02,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518302868] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:32:02,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:32:02,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:32:02,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342814756] [2021-06-05 15:32:02,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:32:02,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:32:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:32:02,449 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-06-05 15:32:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:02,488 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-05 15:32:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:32:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 15:32:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:02,491 INFO L225 Difference]: With dead ends: 50 [2021-06-05 15:32:02,491 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 15:32:02,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:32:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 15:32:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-05 15:32:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-05 15:32:02,506 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-05 15:32:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:02,506 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-05 15:32:02,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-06-05 15:32:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-05 15:32:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:32:02,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:02,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:02,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:32:02,508 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-06-05 15:32:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:02,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10201136] [2021-06-05 15:32:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:02,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:02,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10201136] [2021-06-05 15:32:02,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10201136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:02,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464593002] [2021-06-05 15:32:02,647 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 [2021-06-05 15:32:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:02,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:32:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:02,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464593002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:02,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:02,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 15:32:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424936981] [2021-06-05 15:32:02,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:32:02,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:02,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:32:02,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:32:02,903 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:02,921 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-06-05 15:32:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:32:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:32:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:02,923 INFO L225 Difference]: With dead ends: 99 [2021-06-05 15:32:02,923 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 15:32:02,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:32:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 15:32:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-06-05 15:32:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 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) [2021-06-05 15:32:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-06-05 15:32:02,929 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-06-05 15:32:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:02,929 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-06-05 15:32:02,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-06-05 15:32:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:32:02,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:02,931 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:03,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:32:03,155 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-06-05 15:32:03,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:03,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922748287] [2021-06-05 15:32:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:03,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:03,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922748287] [2021-06-05 15:32:03,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922748287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:03,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966712771] [2021-06-05 15:32:03,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:32:03,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:32:03,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:03,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966712771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:03,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:03,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 15:32:03,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221294617] [2021-06-05 15:32:03,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:32:03,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:03,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:32:03,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:32:03,324 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:03,349 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-06-05 15:32:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:32:03,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:32:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:03,352 INFO L225 Difference]: With dead ends: 80 [2021-06-05 15:32:03,352 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 15:32:03,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:32:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 15:32:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-06-05 15:32:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-05 15:32:03,360 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-06-05 15:32:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:03,360 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-05 15:32:03,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-05 15:32:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:32:03,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:03,361 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:03,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:03,562 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:03,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-06-05 15:32:03,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:03,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069920184] [2021-06-05 15:32:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:03,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:03,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069920184] [2021-06-05 15:32:03,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069920184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:03,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028530310] [2021-06-05 15:32:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:03,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:32:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:32:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:03,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028530310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:03,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:03,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 15:32:03,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395490575] [2021-06-05 15:32:03,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:32:03,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:03,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:32:03,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:32:03,898 INFO L87 Difference]: Start difference. First operand 61 states and 116 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) [2021-06-05 15:32:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:04,247 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-06-05 15:32:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:32:04,248 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 [2021-06-05 15:32:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:04,249 INFO L225 Difference]: With dead ends: 198 [2021-06-05 15:32:04,249 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 15:32:04,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:32:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 15:32:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-06-05 15:32:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-06-05 15:32:04,259 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-06-05 15:32:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:04,259 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-06-05 15:32:04,259 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) [2021-06-05 15:32:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-06-05 15:32:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:32:04,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:04,261 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:04,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:04,478 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:04,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-06-05 15:32:04,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:04,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778364119] [2021-06-05 15:32:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:04,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:04,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778364119] [2021-06-05 15:32:04,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778364119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:04,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975386280] [2021-06-05 15:32:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:04,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:04,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:04,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:32:04,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:04,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975386280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:04,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:04,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 15:32:04,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863249330] [2021-06-05 15:32:04,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:32:04,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:04,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:32:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:32:04,696 INFO L87 Difference]: Start difference. First operand 90 states and 181 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) [2021-06-05 15:32:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:04,999 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-06-05 15:32:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:32:04,999 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 21 [2021-06-05 15:32:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:05,001 INFO L225 Difference]: With dead ends: 170 [2021-06-05 15:32:05,001 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 15:32:05,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:32:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 15:32:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-06-05 15:32:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-06-05 15:32:05,008 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-06-05 15:32:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:05,008 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-06-05 15:32:05,008 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) [2021-06-05 15:32:05,008 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-06-05 15:32:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:32:05,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:05,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:05,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:05,221 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:05,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-06-05 15:32:05,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:05,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090671509] [2021-06-05 15:32:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:05,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:05,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090671509] [2021-06-05 15:32:05,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090671509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:05,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276244461] [2021-06-05 15:32:05,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:05,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:32:05,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:32:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:05,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276244461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:05,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:05,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:32:05,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530916089] [2021-06-05 15:32:05,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:32:05,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:32:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:32:05,419 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:05,443 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-06-05 15:32:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:32:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:32:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:05,445 INFO L225 Difference]: With dead ends: 190 [2021-06-05 15:32:05,445 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 15:32:05,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:32:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 15:32:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-06-05 15:32:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 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) [2021-06-05 15:32:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-06-05 15:32:05,454 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-06-05 15:32:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:05,454 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-06-05 15:32:05,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-06-05 15:32:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:32:05,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:05,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:05,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:05,675 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-06-05 15:32:05,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:05,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127501172] [2021-06-05 15:32:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:05,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:05,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127501172] [2021-06-05 15:32:05,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127501172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:05,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827932252] [2021-06-05 15:32:05,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:05,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:32:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:05,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:32:05,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:06,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827932252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:06,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:06,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:32:06,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211936341] [2021-06-05 15:32:06,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:32:06,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:32:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:32:06,023 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:06,549 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-06-05 15:32:06,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:32:06,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:32:06,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:06,552 INFO L225 Difference]: With dead ends: 320 [2021-06-05 15:32:06,552 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 15:32:06,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:32:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 15:32:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-06-05 15:32:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-06-05 15:32:06,561 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-06-05 15:32:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:06,562 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-06-05 15:32:06,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-06-05 15:32:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:32:06,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:06,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:06,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:06,786 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-06-05 15:32:06,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:06,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175643140] [2021-06-05 15:32:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:06,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175643140] [2021-06-05 15:32:06,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175643140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:06,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850578790] [2021-06-05 15:32:06,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:06,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:32:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:07,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850578790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:07,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:07,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:32:07,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246330867] [2021-06-05 15:32:07,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:32:07,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:32:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:32:07,058 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:07,375 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-06-05 15:32:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:32:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:32:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:07,377 INFO L225 Difference]: With dead ends: 321 [2021-06-05 15:32:07,377 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 15:32:07,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:32:07,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 15:32:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-06-05 15:32:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-06-05 15:32:07,386 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-06-05 15:32:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:07,386 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-06-05 15:32:07,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-06-05 15:32:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:32:07,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:07,387 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:07,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:32:07,612 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-06-05 15:32:07,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:07,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437206304] [2021-06-05 15:32:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:07,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:07,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437206304] [2021-06-05 15:32:07,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437206304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:07,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910260445] [2021-06-05 15:32:07,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:07,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:07,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:32:07,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:07,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910260445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:07,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:07,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 15:32:07,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831296529] [2021-06-05 15:32:07,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:32:07,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:07,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:32:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:32:07,955 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:08,522 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-06-05 15:32:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:32:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:32:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:08,525 INFO L225 Difference]: With dead ends: 435 [2021-06-05 15:32:08,525 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 15:32:08,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:32:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 15:32:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-06-05 15:32:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-06-05 15:32:08,533 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-06-05 15:32:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:08,533 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-06-05 15:32:08,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-06-05 15:32:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:32:08,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:08,534 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:08,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 15:32:08,757 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-06-05 15:32:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:08,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938768632] [2021-06-05 15:32:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:08,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938768632] [2021-06-05 15:32:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938768632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396336836] [2021-06-05 15:32:08,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:32:08,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:32:08,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:08,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:32:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:09,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396336836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:09,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:09,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-05 15:32:09,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388169850] [2021-06-05 15:32:09,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:32:09,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:32:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:32:09,034 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:09,583 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-06-05 15:32:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:32:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:32:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:09,591 INFO L225 Difference]: With dead ends: 340 [2021-06-05 15:32:09,591 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 15:32:09,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:32:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 15:32:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-06-05 15:32:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-06-05 15:32:09,598 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-06-05 15:32:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:09,598 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-06-05 15:32:09,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-06-05 15:32:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:32:09,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:09,599 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:09,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:09,809 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-06-05 15:32:09,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:09,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548124651] [2021-06-05 15:32:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:09,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:09,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548124651] [2021-06-05 15:32:09,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548124651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:09,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122740710] [2021-06-05 15:32:09,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:09,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:32:09,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:09,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122740710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:09,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:09,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:32:09,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736412107] [2021-06-05 15:32:09,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:32:09,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:32:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:32:09,984 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:10,016 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-06-05 15:32:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:32:10,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:32:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:10,018 INFO L225 Difference]: With dead ends: 354 [2021-06-05 15:32:10,018 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 15:32:10,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:32:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 15:32:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-06-05 15:32:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-06-05 15:32:10,025 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-06-05 15:32:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:10,026 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-06-05 15:32:10,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-06-05 15:32:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:32:10,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:10,027 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:10,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:10,237 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-06-05 15:32:10,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:10,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306295122] [2021-06-05 15:32:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:10,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:10,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306295122] [2021-06-05 15:32:10,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306295122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:10,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641524176] [2021-06-05 15:32:10,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:10,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:32:10,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:32:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:10,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641524176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:10,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:10,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:32:10,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046868214] [2021-06-05 15:32:10,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:32:10,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:32:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:32:10,629 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:11,440 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-06-05 15:32:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:32:11,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:32:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:11,443 INFO L225 Difference]: With dead ends: 559 [2021-06-05 15:32:11,443 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 15:32:11,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:32:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 15:32:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-06-05 15:32:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-06-05 15:32:11,452 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-06-05 15:32:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:11,452 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-06-05 15:32:11,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-06-05 15:32:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:32:11,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:11,454 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:11,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:32:11,657 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-06-05 15:32:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:11,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217494298] [2021-06-05 15:32:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:11,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:11,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217494298] [2021-06-05 15:32:11,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217494298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:11,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456135620] [2021-06-05 15:32:11,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:11,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:32:11,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:32:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456135620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:12,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:12,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:32:12,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184582357] [2021-06-05 15:32:12,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:32:12,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:12,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:32:12,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:32:12,045 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:12,787 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-06-05 15:32:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:32:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:32:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:12,791 INFO L225 Difference]: With dead ends: 976 [2021-06-05 15:32:12,791 INFO L226 Difference]: Without dead ends: 940 [2021-06-05 15:32:12,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:32:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-05 15:32:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-06-05 15:32:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-06-05 15:32:12,804 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-06-05 15:32:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:12,804 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-06-05 15:32:12,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-06-05 15:32:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:32:12,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:12,805 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:13,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:32:13,021 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-06-05 15:32:13,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:13,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644744492] [2021-06-05 15:32:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:13,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:13,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644744492] [2021-06-05 15:32:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644744492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:13,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59690975] [2021-06-05 15:32:13,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:13,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:32:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:13,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59690975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:13,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:13,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 15:32:13,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278499120] [2021-06-05 15:32:13,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:32:13,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:32:13,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:32:13,366 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:14,194 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-06-05 15:32:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:32:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:32:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:14,198 INFO L225 Difference]: With dead ends: 802 [2021-06-05 15:32:14,199 INFO L226 Difference]: Without dead ends: 794 [2021-06-05 15:32:14,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:32:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-06-05 15:32:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-06-05 15:32:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-06-05 15:32:14,211 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-06-05 15:32:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:14,211 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-06-05 15:32:14,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-06-05 15:32:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:32:14,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:14,212 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:14,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:32:14,433 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-06-05 15:32:14,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:14,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974792913] [2021-06-05 15:32:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:14,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:14,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974792913] [2021-06-05 15:32:14,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974792913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:14,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304694768] [2021-06-05 15:32:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:14,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:32:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:14,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304694768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:14,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:14,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 15:32:14,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266433436] [2021-06-05 15:32:14,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:32:14,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:14,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:32:14,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:32:14,801 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:15,638 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-06-05 15:32:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:32:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:32:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:15,641 INFO L225 Difference]: With dead ends: 680 [2021-06-05 15:32:15,642 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 15:32:15,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 765.5ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:32:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 15:32:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-06-05 15:32:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-06-05 15:32:15,651 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-06-05 15:32:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:15,652 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-06-05 15:32:15,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-06-05 15:32:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:32:15,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:15,653 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:15,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:15,866 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-06-05 15:32:15,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:15,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51462985] [2021-06-05 15:32:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:15,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:15,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51462985] [2021-06-05 15:32:15,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51462985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:15,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967981252] [2021-06-05 15:32:15,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:15,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:32:15,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:32:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:16,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967981252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:16,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:16,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-05 15:32:16,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709023010] [2021-06-05 15:32:16,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:32:16,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:16,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:32:16,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:32:16,162 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:16,927 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-06-05 15:32:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:32:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:32:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:16,929 INFO L225 Difference]: With dead ends: 520 [2021-06-05 15:32:16,929 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 15:32:16,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:32:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 15:32:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-06-05 15:32:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-06-05 15:32:16,939 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-06-05 15:32:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:16,940 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-06-05 15:32:16,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-06-05 15:32:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:32:16,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:16,941 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:17,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:17,165 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-06-05 15:32:17,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:17,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661714664] [2021-06-05 15:32:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:17,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661714664] [2021-06-05 15:32:17,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661714664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459747646] [2021-06-05 15:32:17,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:17,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:17,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:17,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:32:17,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:17,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459747646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:17,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:17,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 15:32:17,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205812103] [2021-06-05 15:32:17,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:32:17,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:32:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:32:17,355 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:17,407 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-06-05 15:32:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:32:17,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:32:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:17,409 INFO L225 Difference]: With dead ends: 492 [2021-06-05 15:32:17,409 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 15:32:17,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:32:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 15:32:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-06-05 15:32:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-06-05 15:32:17,417 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-06-05 15:32:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:17,417 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-06-05 15:32:17,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-06-05 15:32:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:32:17,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:17,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:17,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:17,641 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:17,641 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-06-05 15:32:17,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:17,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524750615] [2021-06-05 15:32:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:17,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524750615] [2021-06-05 15:32:17,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524750615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708826621] [2021-06-05 15:32:17,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:17,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:32:17,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:17,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:32:17,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:18,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708826621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:18,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:18,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 15:32:18,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867484580] [2021-06-05 15:32:18,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:32:18,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:32:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:32:18,129 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:19,254 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-06-05 15:32:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:32:19,255 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:32:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:19,257 INFO L225 Difference]: With dead ends: 772 [2021-06-05 15:32:19,257 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 15:32:19,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 986.0ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:32:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 15:32:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-06-05 15:32:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-06-05 15:32:19,267 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-06-05 15:32:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:19,267 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-06-05 15:32:19,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-06-05 15:32:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:32:19,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:19,268 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:19,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:32:19,481 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-06-05 15:32:19,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:19,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464096120] [2021-06-05 15:32:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:19,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:19,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464096120] [2021-06-05 15:32:19,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464096120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:19,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274021549] [2021-06-05 15:32:19,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:19,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:32:19,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:19,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:32:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:19,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274021549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:19,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:19,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 15:32:19,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065275479] [2021-06-05 15:32:19,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:32:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:32:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:32:19,867 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:21,102 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-06-05 15:32:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:32:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:32:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:21,106 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 15:32:21,106 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 15:32:21,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1004.9ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:32:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 15:32:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-06-05 15:32:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-06-05 15:32:21,121 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-06-05 15:32:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:21,121 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-06-05 15:32:21,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-06-05 15:32:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:32:21,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:21,122 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:32:21,337 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-06-05 15:32:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:21,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960254696] [2021-06-05 15:32:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:21,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960254696] [2021-06-05 15:32:21,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960254696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548100002] [2021-06-05 15:32:21,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:32:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:21,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548100002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:21,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:21,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 15:32:21,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479022731] [2021-06-05 15:32:21,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:32:21,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:21,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:32:21,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:32:21,742 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:22,949 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-06-05 15:32:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:32:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:32:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:22,952 INFO L225 Difference]: With dead ends: 1094 [2021-06-05 15:32:22,952 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 15:32:22,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1000.4ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:32:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 15:32:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-06-05 15:32:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-06-05 15:32:22,964 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-06-05 15:32:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:22,965 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-06-05 15:32:22,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-06-05 15:32:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:32:22,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:22,967 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:23,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:32:23,184 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:23,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-06-05 15:32:23,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:23,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535469872] [2021-06-05 15:32:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:23,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:23,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535469872] [2021-06-05 15:32:23,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535469872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:23,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39892655] [2021-06-05 15:32:23,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:23,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:23,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:32:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:23,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39892655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:23,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:23,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 15:32:23,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067071609] [2021-06-05 15:32:23,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:32:23,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:32:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:32:23,625 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:24,510 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-06-05 15:32:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:32:24,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:32:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:24,514 INFO L225 Difference]: With dead ends: 1727 [2021-06-05 15:32:24,514 INFO L226 Difference]: Without dead ends: 1631 [2021-06-05 15:32:24,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 841.5ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:32:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-05 15:32:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-06-05 15:32:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-06-05 15:32:24,528 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-06-05 15:32:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:24,528 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-06-05 15:32:24,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-06-05 15:32:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:32:24,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:24,530 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:24,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:32:24,752 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-06-05 15:32:24,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:24,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892731383] [2021-06-05 15:32:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:24,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892731383] [2021-06-05 15:32:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892731383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548039454] [2021-06-05 15:32:24,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:24,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:32:24,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:32:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:25,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548039454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:25,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:25,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 15:32:25,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056508616] [2021-06-05 15:32:25,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:32:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:32:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:32:25,188 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:26,332 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-06-05 15:32:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:32:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:32:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:26,337 INFO L225 Difference]: With dead ends: 1314 [2021-06-05 15:32:26,337 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 15:32:26,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1078.5ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:32:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 15:32:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-06-05 15:32:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-06-05 15:32:26,352 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-06-05 15:32:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:26,352 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-06-05 15:32:26,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-06-05 15:32:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:32:26,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:26,354 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:26,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:26,569 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-06-05 15:32:26,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:26,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84366428] [2021-06-05 15:32:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:26,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:26,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84366428] [2021-06-05 15:32:26,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84366428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:26,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534250067] [2021-06-05 15:32:26,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:26,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:26,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:32:26,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:26,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534250067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:26,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:26,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 15:32:26,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716151087] [2021-06-05 15:32:26,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:32:26,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:26,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:32:26,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:32:26,995 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:28,092 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-06-05 15:32:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:32:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:32:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:28,096 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 15:32:28,096 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 15:32:28,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1034.4ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:32:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 15:32:28,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-06-05 15:32:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-06-05 15:32:28,109 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-06-05 15:32:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:28,109 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-06-05 15:32:28,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-06-05 15:32:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:32:28,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:28,110 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:28,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:28,325 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-06-05 15:32:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:28,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859513639] [2021-06-05 15:32:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:28,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:28,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859513639] [2021-06-05 15:32:28,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859513639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:28,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881776514] [2021-06-05 15:32:28,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:28,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:32:28,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:28,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:32:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:28,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881776514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:28,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:28,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-05 15:32:28,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626255312] [2021-06-05 15:32:28,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:32:28,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:32:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:32:28,698 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:29,774 INFO L93 Difference]: Finished difference Result 940 states and 2022 transitions. [2021-06-05 15:32:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:32:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:32:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:29,777 INFO L225 Difference]: With dead ends: 940 [2021-06-05 15:32:29,777 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 15:32:29,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1059.4ms TimeCoverageRelationStatistics Valid=1104, Invalid=3452, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:32:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 15:32:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 572. [2021-06-05 15:32:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-06-05 15:32:29,794 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-06-05 15:32:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:29,795 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-06-05 15:32:29,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-06-05 15:32:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:32:29,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:29,797 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:30,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:32:30,013 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-06-05 15:32:30,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:30,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106210462] [2021-06-05 15:32:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:30,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:30,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106210462] [2021-06-05 15:32:30,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106210462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:30,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215577227] [2021-06-05 15:32:30,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:30,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:32:30,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:32:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:30,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215577227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:30,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:30,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-06-05 15:32:30,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712836850] [2021-06-05 15:32:30,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:32:30,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:30,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:32:30,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:32:30,258 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:30,391 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-06-05 15:32:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:32:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:32:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:30,394 INFO L225 Difference]: With dead ends: 950 [2021-06-05 15:32:30,394 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 15:32:30,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:32:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 15:32:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-06-05 15:32:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-06-05 15:32:30,408 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-06-05 15:32:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:30,408 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-06-05 15:32:30,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-06-05 15:32:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:32:30,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:30,410 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:30,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:30,625 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 25 times [2021-06-05 15:32:30,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:30,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124988084] [2021-06-05 15:32:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:30,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:30,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124988084] [2021-06-05 15:32:30,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124988084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:30,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899887319] [2021-06-05 15:32:30,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:32:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:31,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899887319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:31,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:31,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 15:32:31,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131789245] [2021-06-05 15:32:31,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:32:31,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:32:31,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:32:31,145 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:32,844 INFO L93 Difference]: Finished difference Result 2174 states and 4585 transitions. [2021-06-05 15:32:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:32:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:32:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:32,851 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 15:32:32,852 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 15:32:32,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1365.8ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:32:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 15:32:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 800. [2021-06-05 15:32:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3617021276595747) internal successors, (1887), 799 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1887 transitions. [2021-06-05 15:32:32,872 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1887 transitions. Word has length 35 [2021-06-05 15:32:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:32,872 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1887 transitions. [2021-06-05 15:32:32,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1887 transitions. [2021-06-05 15:32:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:32:32,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:32,874 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:33,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:32:33,089 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 26 times [2021-06-05 15:32:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:33,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785054368] [2021-06-05 15:32:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:33,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:33,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785054368] [2021-06-05 15:32:33,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785054368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:33,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960705708] [2021-06-05 15:32:33,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:33,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:33,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:32:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:33,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960705708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:33,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:33,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 15:32:33,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726700956] [2021-06-05 15:32:33,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:32:33,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:32:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:32:33,578 INFO L87 Difference]: Start difference. First operand 800 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:35,073 INFO L93 Difference]: Finished difference Result 1787 states and 3872 transitions. [2021-06-05 15:32:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:32:35,073 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:32:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:35,077 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 15:32:35,078 INFO L226 Difference]: Without dead ends: 1783 [2021-06-05 15:32:35,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1225.8ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:32:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-06-05 15:32:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 712. [2021-06-05 15:32:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-06-05 15:32:35,091 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-06-05 15:32:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:35,092 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-06-05 15:32:35,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-06-05 15:32:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:32:35,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:35,093 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:35,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:35,309 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 27 times [2021-06-05 15:32:35,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:35,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582881153] [2021-06-05 15:32:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:35,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582881153] [2021-06-05 15:32:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582881153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932267421] [2021-06-05 15:32:35,451 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 [2021-06-05 15:32:35,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:32:35,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:32:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932267421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:35,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:35,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 15:32:35,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121043516] [2021-06-05 15:32:35,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:32:35,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:32:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:32:35,785 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:37,356 INFO L93 Difference]: Finished difference Result 2749 states and 5737 transitions. [2021-06-05 15:32:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:32:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:32:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:37,365 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 15:32:37,365 INFO L226 Difference]: Without dead ends: 2653 [2021-06-05 15:32:37,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1317.5ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:32:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-06-05 15:32:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 712. [2021-06-05 15:32:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-06-05 15:32:37,382 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-06-05 15:32:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:37,382 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-06-05 15:32:37,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-06-05 15:32:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:32:37,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:37,384 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:37,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 15:32:37,598 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 28 times [2021-06-05 15:32:37,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:37,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335687556] [2021-06-05 15:32:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:37,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:37,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335687556] [2021-06-05 15:32:37,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335687556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911434207] [2021-06-05 15:32:37,742 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 [2021-06-05 15:32:37,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:37,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:37,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:32:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:38,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911434207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:38,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:38,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 15:32:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753719506] [2021-06-05 15:32:38,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:32:38,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:32:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:32:38,108 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:39,403 INFO L93 Difference]: Finished difference Result 3359 states and 7152 transitions. [2021-06-05 15:32:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:32:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:32:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:39,409 INFO L225 Difference]: With dead ends: 3359 [2021-06-05 15:32:39,409 INFO L226 Difference]: Without dead ends: 3170 [2021-06-05 15:32:39,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1238.3ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:32:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-06-05 15:32:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 740. [2021-06-05 15:32:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.266576454668471) internal successors, (1675), 739 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1675 transitions. [2021-06-05 15:32:39,440 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1675 transitions. Word has length 35 [2021-06-05 15:32:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:39,440 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1675 transitions. [2021-06-05 15:32:39,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1675 transitions. [2021-06-05 15:32:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:32:39,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:39,442 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:39,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:32:39,661 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1190311629, now seen corresponding path program 29 times [2021-06-05 15:32:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:39,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119731876] [2021-06-05 15:32:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:39,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:39,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119731876] [2021-06-05 15:32:39,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119731876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:39,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750693657] [2021-06-05 15:32:39,745 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 [2021-06-05 15:32:39,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:32:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:32:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:40,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750693657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:40,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:40,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-06-05 15:32:40,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687108776] [2021-06-05 15:32:40,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:32:40,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:32:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:32:40,073 INFO L87 Difference]: Start difference. First operand 740 states and 1675 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:41,758 INFO L93 Difference]: Finished difference Result 2167 states and 4649 transitions. [2021-06-05 15:32:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:32:41,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:32:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:41,761 INFO L225 Difference]: With dead ends: 2167 [2021-06-05 15:32:41,761 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 15:32:41,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1545.6ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:32:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 15:32:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 800. [2021-06-05 15:32:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3204005006257824) internal successors, (1854), 799 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1854 transitions. [2021-06-05 15:32:41,775 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1854 transitions. Word has length 35 [2021-06-05 15:32:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:41,775 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1854 transitions. [2021-06-05 15:32:41,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1854 transitions. [2021-06-05 15:32:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:41,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:41,777 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:41,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:32:41,993 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:41,993 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 30 times [2021-06-05 15:32:41,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:41,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956967603] [2021-06-05 15:32:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:42,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:42,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956967603] [2021-06-05 15:32:42,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956967603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:42,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033110070] [2021-06-05 15:32:42,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:32:42,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:32:42,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:32:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:42,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033110070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:42,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:42,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 15:32:42,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511801232] [2021-06-05 15:32:42,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:32:42,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:32:42,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:32:42,512 INFO L87 Difference]: Start difference. First operand 800 states and 1854 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:44,072 INFO L93 Difference]: Finished difference Result 1623 states and 3425 transitions. [2021-06-05 15:32:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:32:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:44,075 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 15:32:44,075 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 15:32:44,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 1450.6ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 15:32:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 15:32:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 807. [2021-06-05 15:32:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3089330024813894) internal successors, (1861), 806 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1861 transitions. [2021-06-05 15:32:44,086 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1861 transitions. Word has length 37 [2021-06-05 15:32:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:44,086 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1861 transitions. [2021-06-05 15:32:44,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1861 transitions. [2021-06-05 15:32:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:44,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:44,088 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:44,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:44,310 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 31 times [2021-06-05 15:32:44,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:44,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536132955] [2021-06-05 15:32:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:44,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:44,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536132955] [2021-06-05 15:32:44,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536132955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:44,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192487050] [2021-06-05 15:32:44,382 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 [2021-06-05 15:32:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:32:44,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:44,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192487050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:44,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:44,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-06-05 15:32:44,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710209575] [2021-06-05 15:32:44,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:32:44,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:44,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:32:44,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:32:44,713 INFO L87 Difference]: Start difference. First operand 807 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:46,075 INFO L93 Difference]: Finished difference Result 1315 states and 2845 transitions. [2021-06-05 15:32:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:32:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:46,077 INFO L225 Difference]: With dead ends: 1315 [2021-06-05 15:32:46,077 INFO L226 Difference]: Without dead ends: 1311 [2021-06-05 15:32:46,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1358.9ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:32:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-05 15:32:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 787. [2021-06-05 15:32:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.3155216284987277) internal successors, (1820), 786 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1820 transitions. [2021-06-05 15:32:46,087 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1820 transitions. Word has length 37 [2021-06-05 15:32:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:46,087 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1820 transitions. [2021-06-05 15:32:46,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1820 transitions. [2021-06-05 15:32:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:46,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:46,089 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:46,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:32:46,305 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:46,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1424137007, now seen corresponding path program 32 times [2021-06-05 15:32:46,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:46,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666830690] [2021-06-05 15:32:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:32:46,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:46,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666830690] [2021-06-05 15:32:46,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666830690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:46,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413795388] [2021-06-05 15:32:46,389 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 [2021-06-05 15:32:46,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:46,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:46,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:32:46,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413795388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:46,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:46,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-06-05 15:32:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268669507] [2021-06-05 15:32:46,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:32:46,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:32:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:32:46,693 INFO L87 Difference]: Start difference. First operand 787 states and 1820 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:47,811 INFO L93 Difference]: Finished difference Result 2091 states and 4512 transitions. [2021-06-05 15:32:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:32:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:47,815 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 15:32:47,815 INFO L226 Difference]: Without dead ends: 2082 [2021-06-05 15:32:47,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 942.9ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:32:47,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-06-05 15:32:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1285. [2021-06-05 15:32:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.367601246105919) internal successors, (3040), 1284 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3040 transitions. [2021-06-05 15:32:47,837 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3040 transitions. Word has length 37 [2021-06-05 15:32:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:47,837 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 3040 transitions. [2021-06-05 15:32:47,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3040 transitions. [2021-06-05 15:32:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:32:47,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:47,839 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:48,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 15:32:48,049 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-06-05 15:32:48,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:48,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696841685] [2021-06-05 15:32:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:48,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:48,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696841685] [2021-06-05 15:32:48,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696841685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:48,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412366920] [2021-06-05 15:32:48,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:48,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:32:48,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:32:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:48,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412366920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:48,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:48,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-06-05 15:32:48,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455832603] [2021-06-05 15:32:48,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:32:48,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:32:48,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:32:48,314 INFO L87 Difference]: Start difference. First operand 1285 states and 3040 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:48,460 INFO L93 Difference]: Finished difference Result 1931 states and 4496 transitions. [2021-06-05 15:32:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:32:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:32:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:48,464 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 15:32:48,464 INFO L226 Difference]: Without dead ends: 1874 [2021-06-05 15:32:48,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:32:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-06-05 15:32:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1608. [2021-06-05 15:32:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.40261356565028) internal successors, (3861), 1607 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 3861 transitions. [2021-06-05 15:32:48,493 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 3861 transitions. Word has length 39 [2021-06-05 15:32:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:48,493 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 3861 transitions. [2021-06-05 15:32:48,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 3861 transitions. [2021-06-05 15:32:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:32:48,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:48,496 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:48,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:32:48,709 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 34 times [2021-06-05 15:32:48,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:48,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311398151] [2021-06-05 15:32:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:48,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:48,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311398151] [2021-06-05 15:32:48,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311398151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:48,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86180447] [2021-06-05 15:32:48,854 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 [2021-06-05 15:32:48,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:48,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:32:48,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86180447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:49,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:49,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-06-05 15:32:49,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812246206] [2021-06-05 15:32:49,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:32:49,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:32:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:32:49,266 INFO L87 Difference]: Start difference. First operand 1608 states and 3861 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:51,495 INFO L93 Difference]: Finished difference Result 3088 states and 6943 transitions. [2021-06-05 15:32:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:32:51,495 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:32:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:51,500 INFO L225 Difference]: With dead ends: 3088 [2021-06-05 15:32:51,500 INFO L226 Difference]: Without dead ends: 3084 [2021-06-05 15:32:51,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1661.0ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:32:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-06-05 15:32:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1766. [2021-06-05 15:32:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-06-05 15:32:51,539 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-06-05 15:32:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:51,540 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-06-05 15:32:51,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-06-05 15:32:51,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:32:51,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:51,542 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:51,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 15:32:51,765 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:51,765 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 35 times [2021-06-05 15:32:51,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:51,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484466085] [2021-06-05 15:32:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:51,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:51,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484466085] [2021-06-05 15:32:51,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484466085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:51,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132245137] [2021-06-05 15:32:51,919 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 [2021-06-05 15:32:51,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:32:51,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:32:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:52,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132245137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:52,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:52,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 15:32:52,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338889637] [2021-06-05 15:32:52,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:32:52,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:32:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:32:52,298 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:54,892 INFO L93 Difference]: Finished difference Result 4762 states and 10494 transitions. [2021-06-05 15:32:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:32:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:32:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:54,899 INFO L225 Difference]: With dead ends: 4762 [2021-06-05 15:32:54,899 INFO L226 Difference]: Without dead ends: 4714 [2021-06-05 15:32:54,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 1908.5ms TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 15:32:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-06-05 15:32:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 1566. [2021-06-05 15:32:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-06-05 15:32:54,939 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-06-05 15:32:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:54,939 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-06-05 15:32:54,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-06-05 15:32:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:32:54,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:54,942 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:55,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:55,157 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 36 times [2021-06-05 15:32:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:55,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676150362] [2021-06-05 15:32:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:55,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676150362] [2021-06-05 15:32:55,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676150362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303579334] [2021-06-05 15:32:55,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:55,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:32:55,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:55,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:32:55,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:55,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303579334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:55,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:55,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 15:32:55,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908233400] [2021-06-05 15:32:55,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:32:55,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:55,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:32:55,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:32:55,685 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:57,506 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-06-05 15:32:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:32:57,507 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:32:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:57,512 INFO L225 Difference]: With dead ends: 5523 [2021-06-05 15:32:57,512 INFO L226 Difference]: Without dead ends: 5397 [2021-06-05 15:32:57,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1538.5ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:32:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-06-05 15:32:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-06-05 15:32:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-06-05 15:32:57,544 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-06-05 15:32:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:57,545 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-06-05 15:32:57,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-06-05 15:32:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:32:57,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:57,547 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:57,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 15:32:57,761 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 37 times [2021-06-05 15:32:57,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:57,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378526964] [2021-06-05 15:32:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:57,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:57,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378526964] [2021-06-05 15:32:57,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378526964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:57,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935826405] [2021-06-05 15:32:57,924 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 [2021-06-05 15:32:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:57,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:32:57,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:58,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935826405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:58,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:58,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:32:58,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136098981] [2021-06-05 15:32:58,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:32:58,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:32:58,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:32:58,343 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:00,133 INFO L93 Difference]: Finished difference Result 5929 states and 13118 transitions. [2021-06-05 15:33:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:33:00,133 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:33:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:00,138 INFO L225 Difference]: With dead ends: 5929 [2021-06-05 15:33:00,138 INFO L226 Difference]: Without dead ends: 5656 [2021-06-05 15:33:00,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1638.0ms TimeCoverageRelationStatistics Valid=1779, Invalid=7533, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 15:33:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-06-05 15:33:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 1758. [2021-06-05 15:33:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-06-05 15:33:00,169 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-06-05 15:33:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:00,169 INFO L482 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-06-05 15:33:00,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-06-05 15:33:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:33:00,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:00,181 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:00,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 15:33:00,385 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 38 times [2021-06-05 15:33:00,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:00,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773865734] [2021-06-05 15:33:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:00,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:00,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773865734] [2021-06-05 15:33:00,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773865734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:00,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160208251] [2021-06-05 15:33:00,484 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 [2021-06-05 15:33:00,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:33:00,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:33:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:00,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160208251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:00,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:00,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-06-05 15:33:00,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245707484] [2021-06-05 15:33:00,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:33:00,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:00,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:33:00,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:33:00,899 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:03,364 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-06-05 15:33:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 15:33:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:33:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:03,368 INFO L225 Difference]: With dead ends: 3958 [2021-06-05 15:33:03,369 INFO L226 Difference]: Without dead ends: 3954 [2021-06-05 15:33:03,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2273.6ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 15:33:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-06-05 15:33:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-06-05 15:33:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-06-05 15:33:03,397 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-06-05 15:33:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:03,397 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-06-05 15:33:03,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-06-05 15:33:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:33:03,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:03,400 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:03,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:03,617 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 39 times [2021-06-05 15:33:03,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:03,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980913625] [2021-06-05 15:33:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:03,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:03,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980913625] [2021-06-05 15:33:03,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980913625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:03,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310598778] [2021-06-05 15:33:03,776 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 [2021-06-05 15:33:03,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 15:33:03,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:33:03,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:04,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310598778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:04,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:04,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 15:33:04,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153149081] [2021-06-05 15:33:04,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:33:04,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:33:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:33:04,274 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:06,332 INFO L93 Difference]: Finished difference Result 3268 states and 7276 transitions. [2021-06-05 15:33:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 15:33:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:33:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:06,335 INFO L225 Difference]: With dead ends: 3268 [2021-06-05 15:33:06,335 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 15:33:06,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1968.4ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 15:33:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 15:33:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1787. [2021-06-05 15:33:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-06-05 15:33:06,371 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-06-05 15:33:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:06,371 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-06-05 15:33:06,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-06-05 15:33:06,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:33:06,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:06,373 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:06,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 15:33:06,589 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 40 times [2021-06-05 15:33:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:06,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448230972] [2021-06-05 15:33:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:06,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:06,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448230972] [2021-06-05 15:33:06,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448230972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:06,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147468224] [2021-06-05 15:33:06,691 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 [2021-06-05 15:33:06,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:33:06,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:06,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:33:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:07,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147468224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:07,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:07,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-06-05 15:33:07,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856433470] [2021-06-05 15:33:07,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:33:07,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:07,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:33:07,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:33:07,068 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:09,000 INFO L93 Difference]: Finished difference Result 2437 states and 5514 transitions. [2021-06-05 15:33:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 15:33:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:33:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:09,003 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 15:33:09,003 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 15:33:09,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1855.6ms TimeCoverageRelationStatistics Valid=2626, Invalid=8504, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 15:33:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 15:33:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1763. [2021-06-05 15:33:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-06-05 15:33:09,027 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-06-05 15:33:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:09,028 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-06-05 15:33:09,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-06-05 15:33:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:09,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:09,031 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:09,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:09,254 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 41 times [2021-06-05 15:33:09,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:09,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376396645] [2021-06-05 15:33:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:09,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:09,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376396645] [2021-06-05 15:33:09,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376396645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:09,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333379123] [2021-06-05 15:33:09,357 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 [2021-06-05 15:33:09,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:33:09,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:09,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:33:09,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:09,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333379123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:09,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:09,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 15:33:09,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986122217] [2021-06-05 15:33:09,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:33:09,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:09,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:33:09,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:33:09,470 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:09,585 INFO L93 Difference]: Finished difference Result 2486 states and 5827 transitions. [2021-06-05 15:33:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:33:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:09,589 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 15:33:09,589 INFO L226 Difference]: Without dead ends: 2429 [2021-06-05 15:33:09,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:33:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-05 15:33:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2196. [2021-06-05 15:33:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.4314350797266515) internal successors, (5337), 2195 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5337 transitions. [2021-06-05 15:33:09,628 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5337 transitions. Word has length 43 [2021-06-05 15:33:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:09,630 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 5337 transitions. [2021-06-05 15:33:09,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5337 transitions. [2021-06-05 15:33:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:09,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:09,633 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:09,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 15:33:09,853 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 42 times [2021-06-05 15:33:09,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:09,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290245511] [2021-06-05 15:33:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:10,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290245511] [2021-06-05 15:33:10,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290245511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936464388] [2021-06-05 15:33:10,046 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 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 [2021-06-05 15:33:10,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:33:10,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 15:33:10,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:10,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936464388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:10,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:10,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 15:33:10,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897238320] [2021-06-05 15:33:10,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:33:10,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:33:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:33:10,556 INFO L87 Difference]: Start difference. First operand 2196 states and 5337 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:13,534 INFO L93 Difference]: Finished difference Result 5082 states and 11297 transitions. [2021-06-05 15:33:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 15:33:13,534 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:13,539 INFO L225 Difference]: With dead ends: 5082 [2021-06-05 15:33:13,539 INFO L226 Difference]: Without dead ends: 5049 [2021-06-05 15:33:13,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 2176.4ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 15:33:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-06-05 15:33:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2469. [2021-06-05 15:33:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.4315235008103726) internal successors, (6001), 2468 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 6001 transitions. [2021-06-05 15:33:13,575 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 6001 transitions. Word has length 43 [2021-06-05 15:33:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:13,575 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 6001 transitions. [2021-06-05 15:33:13,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 6001 transitions. [2021-06-05 15:33:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:13,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:13,578 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:13,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:33:13,789 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 43 times [2021-06-05 15:33:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:13,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468282415] [2021-06-05 15:33:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:13,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:13,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468282415] [2021-06-05 15:33:13,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468282415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:13,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737078116] [2021-06-05 15:33:13,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:33:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 15:33:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:14,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737078116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:14,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:14,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-06-05 15:33:14,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485666910] [2021-06-05 15:33:14,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:33:14,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:14,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:33:14,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:33:14,499 INFO L87 Difference]: Start difference. First operand 2469 states and 6001 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:17,009 INFO L93 Difference]: Finished difference Result 4063 states and 9266 transitions. [2021-06-05 15:33:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:33:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:17,013 INFO L225 Difference]: With dead ends: 4063 [2021-06-05 15:33:17,013 INFO L226 Difference]: Without dead ends: 4059 [2021-06-05 15:33:17,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1954.1ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 15:33:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-06-05 15:33:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 2259. [2021-06-05 15:33:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.425597874224978) internal successors, (5477), 2258 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5477 transitions. [2021-06-05 15:33:17,050 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5477 transitions. Word has length 43 [2021-06-05 15:33:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:17,062 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5477 transitions. [2021-06-05 15:33:17,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5477 transitions. [2021-06-05 15:33:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:17,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:17,065 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:17,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:17,284 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:17,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 44 times [2021-06-05 15:33:17,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:17,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692892065] [2021-06-05 15:33:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:17,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692892065] [2021-06-05 15:33:17,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692892065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684583879] [2021-06-05 15:33:17,461 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 [2021-06-05 15:33:17,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:33:17,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:33:17,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:17,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684583879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:17,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:17,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-06-05 15:33:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595340047] [2021-06-05 15:33:17,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:33:17,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:17,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:33:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:33:17,912 INFO L87 Difference]: Start difference. First operand 2259 states and 5477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:21,329 INFO L93 Difference]: Finished difference Result 5894 states and 13012 transitions. [2021-06-05 15:33:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 15:33:21,330 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:21,335 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 15:33:21,335 INFO L226 Difference]: Without dead ends: 5846 [2021-06-05 15:33:21,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 2426.6ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 15:33:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-05 15:33:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2347. [2021-06-05 15:33:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.411764705882353) internal successors, (5658), 2346 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 5658 transitions. [2021-06-05 15:33:21,371 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 5658 transitions. Word has length 43 [2021-06-05 15:33:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:21,372 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 5658 transitions. [2021-06-05 15:33:21,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 5658 transitions. [2021-06-05 15:33:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:21,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:21,374 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:21,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 15:33:21,574 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 45 times [2021-06-05 15:33:21,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:21,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019194342] [2021-06-05 15:33:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:21,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:21,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019194342] [2021-06-05 15:33:21,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019194342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:21,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640969267] [2021-06-05 15:33:21,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:21,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 15:33:21,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:33:21,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:22,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640969267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:22,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:22,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 15:33:22,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888958073] [2021-06-05 15:33:22,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:33:22,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:22,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:33:22,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:33:22,335 INFO L87 Difference]: Start difference. First operand 2347 states and 5658 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:25,243 INFO L93 Difference]: Finished difference Result 7652 states and 16783 transitions. [2021-06-05 15:33:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 15:33:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:25,251 INFO L225 Difference]: With dead ends: 7652 [2021-06-05 15:33:25,251 INFO L226 Difference]: Without dead ends: 7478 [2021-06-05 15:33:25,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 2453.3ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 15:33:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-05 15:33:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 2225. [2021-06-05 15:33:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 2.428956834532374) internal successors, (5402), 2224 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 5402 transitions. [2021-06-05 15:33:25,293 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 5402 transitions. Word has length 43 [2021-06-05 15:33:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:25,293 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 5402 transitions. [2021-06-05 15:33:25,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 5402 transitions. [2021-06-05 15:33:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:25,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:25,296 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:25,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:25,496 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 46 times [2021-06-05 15:33:25,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:25,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601227192] [2021-06-05 15:33:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:25,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:25,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601227192] [2021-06-05 15:33:25,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601227192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:25,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332464312] [2021-06-05 15:33:25,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:25,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:33:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:25,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:33:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:26,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332464312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:26,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:26,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 15:33:26,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382172098] [2021-06-05 15:33:26,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:33:26,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:26,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:33:26,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:33:26,118 INFO L87 Difference]: Start difference. First operand 2225 states and 5402 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:28,527 INFO L93 Difference]: Finished difference Result 8464 states and 18466 transitions. [2021-06-05 15:33:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 15:33:28,528 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:28,537 INFO L225 Difference]: With dead ends: 8464 [2021-06-05 15:33:28,537 INFO L226 Difference]: Without dead ends: 8230 [2021-06-05 15:33:28,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 1997.2ms TimeCoverageRelationStatistics Valid=2344, Invalid=10996, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 15:33:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-06-05 15:33:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 2241. [2021-06-05 15:33:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.4258928571428573) internal successors, (5434), 2240 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 5434 transitions. [2021-06-05 15:33:28,585 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 5434 transitions. Word has length 43 [2021-06-05 15:33:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:28,585 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 5434 transitions. [2021-06-05 15:33:28,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 5434 transitions. [2021-06-05 15:33:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:28,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:28,588 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:28,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:33:28,805 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 47 times [2021-06-05 15:33:28,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:28,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738200635] [2021-06-05 15:33:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:28,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:28,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738200635] [2021-06-05 15:33:28,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738200635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:28,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519279095] [2021-06-05 15:33:28,975 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 [2021-06-05 15:33:29,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:33:29,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:33:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:29,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519279095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:29,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:29,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 15:33:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497327633] [2021-06-05 15:33:29,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:33:29,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:29,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:33:29,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:33:29,416 INFO L87 Difference]: Start difference. First operand 2241 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:32,060 INFO L93 Difference]: Finished difference Result 7868 states and 17355 transitions. [2021-06-05 15:33:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 15:33:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:32,067 INFO L225 Difference]: With dead ends: 7868 [2021-06-05 15:33:32,067 INFO L226 Difference]: Without dead ends: 7508 [2021-06-05 15:33:32,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 2394.0ms TimeCoverageRelationStatistics Valid=3415, Invalid=13615, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 15:33:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-05 15:33:32,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 2254. [2021-06-05 15:33:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.361739902352419) internal successors, (5321), 2253 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5321 transitions. [2021-06-05 15:33:32,119 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5321 transitions. Word has length 43 [2021-06-05 15:33:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:32,119 INFO L482 AbstractCegarLoop]: Abstraction has 2254 states and 5321 transitions. [2021-06-05 15:33:32,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5321 transitions. [2021-06-05 15:33:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:33:32,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:32,122 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:32,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:32,337 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 48 times [2021-06-05 15:33:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025743653] [2021-06-05 15:33:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:32,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:32,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025743653] [2021-06-05 15:33:32,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025743653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:32,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410262983] [2021-06-05 15:33:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:33:32,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 15:33:32,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:33:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:32,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410262983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:32,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:32,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-06-05 15:33:32,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603097743] [2021-06-05 15:33:32,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:33:32,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:32,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:33:32,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:33:32,904 INFO L87 Difference]: Start difference. First operand 2254 states and 5321 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:36,539 INFO L93 Difference]: Finished difference Result 5015 states and 11067 transitions. [2021-06-05 15:33:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 15:33:36,540 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:33:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:36,544 INFO L225 Difference]: With dead ends: 5015 [2021-06-05 15:33:36,544 INFO L226 Difference]: Without dead ends: 5011 [2021-06-05 15:33:36,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3309.5ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-06-05 15:33:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-05 15:33:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2303. [2021-06-05 15:33:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.385317115551694) internal successors, (5491), 2302 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5491 transitions. [2021-06-05 15:33:36,576 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5491 transitions. Word has length 43 [2021-06-05 15:33:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:36,576 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 5491 transitions. [2021-06-05 15:33:36,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5491 transitions. [2021-06-05 15:33:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:36,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:36,578 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:36,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:36,779 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 49 times [2021-06-05 15:33:36,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:36,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761578532] [2021-06-05 15:33:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:36,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:36,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761578532] [2021-06-05 15:33:36,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761578532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977780378] [2021-06-05 15:33:36,968 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 [2021-06-05 15:33:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:33:37,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:37,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977780378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:37,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:37,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-06-05 15:33:37,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314795653] [2021-06-05 15:33:37,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:33:37,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:37,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:33:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:33:37,432 INFO L87 Difference]: Start difference. First operand 2303 states and 5491 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:40,173 INFO L93 Difference]: Finished difference Result 3620 states and 8022 transitions. [2021-06-05 15:33:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 15:33:40,173 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:40,177 INFO L225 Difference]: With dead ends: 3620 [2021-06-05 15:33:40,177 INFO L226 Difference]: Without dead ends: 3422 [2021-06-05 15:33:40,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2491.8ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 15:33:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-05 15:33:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2306. [2021-06-05 15:33:40,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3800433839479394) internal successors, (5486), 2305 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5486 transitions. [2021-06-05 15:33:40,214 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5486 transitions. Word has length 45 [2021-06-05 15:33:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:40,214 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5486 transitions. [2021-06-05 15:33:40,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5486 transitions. [2021-06-05 15:33:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:40,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:40,218 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:40,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:40,441 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:40,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 50 times [2021-06-05 15:33:40,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:40,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975790753] [2021-06-05 15:33:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:40,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:40,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975790753] [2021-06-05 15:33:40,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975790753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:40,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242940416] [2021-06-05 15:33:40,555 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 [2021-06-05 15:33:40,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:33:40,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:33:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:41,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242940416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:41,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:41,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-06-05 15:33:41,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359038794] [2021-06-05 15:33:41,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:33:41,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:41,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:33:41,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:33:41,024 INFO L87 Difference]: Start difference. First operand 2306 states and 5486 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:43,584 INFO L93 Difference]: Finished difference Result 3140 states and 7114 transitions. [2021-06-05 15:33:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 15:33:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:43,587 INFO L225 Difference]: With dead ends: 3140 [2021-06-05 15:33:43,587 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 15:33:43,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2450.8ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 15:33:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 15:33:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2306. [2021-06-05 15:33:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3796095444685466) internal successors, (5485), 2305 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5485 transitions. [2021-06-05 15:33:43,610 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5485 transitions. Word has length 45 [2021-06-05 15:33:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:43,610 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5485 transitions. [2021-06-05 15:33:43,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5485 transitions. [2021-06-05 15:33:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:43,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:43,613 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:43,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:43,813 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1657156185, now seen corresponding path program 51 times [2021-06-05 15:33:43,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:43,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214944166] [2021-06-05 15:33:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:33:43,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214944166] [2021-06-05 15:33:43,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214944166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947410482] [2021-06-05 15:33:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:43,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 15:33:43,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:33:43,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:44,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947410482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:44,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:44,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-05 15:33:44,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337794014] [2021-06-05 15:33:44,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:33:44,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:33:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:33:44,467 INFO L87 Difference]: Start difference. First operand 2306 states and 5485 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:46,955 INFO L93 Difference]: Finished difference Result 6205 states and 13891 transitions. [2021-06-05 15:33:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 15:33:46,956 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:46,961 INFO L225 Difference]: With dead ends: 6205 [2021-06-05 15:33:46,961 INFO L226 Difference]: Without dead ends: 6205 [2021-06-05 15:33:46,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2418.6ms TimeCoverageRelationStatistics Valid=3242, Invalid=10098, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 15:33:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-06-05 15:33:46,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3688. [2021-06-05 15:33:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.414429075128831) internal successors, (8902), 3687 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 8902 transitions. [2021-06-05 15:33:47,003 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 8902 transitions. Word has length 45 [2021-06-05 15:33:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:47,003 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 8902 transitions. [2021-06-05 15:33:47,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 8902 transitions. [2021-06-05 15:33:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:33:47,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:47,007 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:47,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 15:33:47,208 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 52 times [2021-06-05 15:33:47,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:47,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195549212] [2021-06-05 15:33:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:47,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:47,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195549212] [2021-06-05 15:33:47,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195549212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:47,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183796918] [2021-06-05 15:33:47,316 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 [2021-06-05 15:33:47,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:33:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:33:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183796918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:47,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:47,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 15:33:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105977811] [2021-06-05 15:33:47,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:33:47,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:33:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:33:47,435 INFO L87 Difference]: Start difference. First operand 3688 states and 8902 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:47,565 INFO L93 Difference]: Finished difference Result 4861 states and 11682 transitions. [2021-06-05 15:33:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:33:47,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:33:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:47,571 INFO L225 Difference]: With dead ends: 4861 [2021-06-05 15:33:47,571 INFO L226 Difference]: Without dead ends: 4798 [2021-06-05 15:33:47,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:33:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-06-05 15:33:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4433. [2021-06-05 15:33:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 2.4490072202166067) internal successors, (10854), 4432 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 10854 transitions. [2021-06-05 15:33:47,662 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 10854 transitions. Word has length 47 [2021-06-05 15:33:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:47,662 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 10854 transitions. [2021-06-05 15:33:47,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 10854 transitions. [2021-06-05 15:33:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:33:47,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:47,668 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:47,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:47,889 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 53 times [2021-06-05 15:33:47,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:47,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064454560] [2021-06-05 15:33:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:48,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064454560] [2021-06-05 15:33:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064454560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135400114] [2021-06-05 15:33:48,204 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 [2021-06-05 15:33:48,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:33:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:33:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:48,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135400114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:48,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:48,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-05 15:33:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139602475] [2021-06-05 15:33:48,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:33:48,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:48,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:33:48,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:33:48,786 INFO L87 Difference]: Start difference. First operand 4433 states and 10854 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:51,926 INFO L93 Difference]: Finished difference Result 5913 states and 13861 transitions. [2021-06-05 15:33:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:33:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:33:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:51,932 INFO L225 Difference]: With dead ends: 5913 [2021-06-05 15:33:51,932 INFO L226 Difference]: Without dead ends: 5907 [2021-06-05 15:33:51,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2381.8ms TimeCoverageRelationStatistics Valid=978, Invalid=10152, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 15:33:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-06-05 15:33:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4386. [2021-06-05 15:33:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 2.4408209806157353) internal successors, (10703), 4385 states have internal predecessors, (10703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 10703 transitions. [2021-06-05 15:33:51,987 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 10703 transitions. Word has length 47 [2021-06-05 15:33:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:51,987 INFO L482 AbstractCegarLoop]: Abstraction has 4386 states and 10703 transitions. [2021-06-05 15:33:51,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 10703 transitions. [2021-06-05 15:33:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:33:51,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:51,992 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:52,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:52,193 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 54 times [2021-06-05 15:33:52,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:52,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712690627] [2021-06-05 15:33:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:52,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712690627] [2021-06-05 15:33:52,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712690627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722787774] [2021-06-05 15:33:52,393 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 [2021-06-05 15:33:52,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 15:33:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:33:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:52,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722787774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:52,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:52,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-06-05 15:33:52,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299649830] [2021-06-05 15:33:52,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:33:52,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:52,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:33:52,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:33:52,998 INFO L87 Difference]: Start difference. First operand 4386 states and 10703 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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) [2021-06-05 15:33:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:56,782 INFO L93 Difference]: Finished difference Result 8676 states and 19853 transitions. [2021-06-05 15:33:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 15:33:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:33:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:56,792 INFO L225 Difference]: With dead ends: 8676 [2021-06-05 15:33:56,792 INFO L226 Difference]: Without dead ends: 8652 [2021-06-05 15:33:56,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 2686.0ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 15:33:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-06-05 15:33:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 4780. [2021-06-05 15:33:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 2.446746181209458) internal successors, (11693), 4779 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 11693 transitions. [2021-06-05 15:33:56,856 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 11693 transitions. Word has length 47 [2021-06-05 15:33:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:56,856 INFO L482 AbstractCegarLoop]: Abstraction has 4780 states and 11693 transitions. [2021-06-05 15:33:56,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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) [2021-06-05 15:33:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 11693 transitions. [2021-06-05 15:33:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:33:56,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:56,861 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:57,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:57,065 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 55 times [2021-06-05 15:33:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025714251] [2021-06-05 15:33:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:57,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025714251] [2021-06-05 15:33:57,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025714251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363044477] [2021-06-05 15:33:57,257 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 [2021-06-05 15:33:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:57,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:33:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:57,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363044477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:57,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:57,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-06-05 15:33:57,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356726975] [2021-06-05 15:33:57,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:33:57,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:33:57,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:33:57,820 INFO L87 Difference]: Start difference. First operand 4780 states and 11693 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:01,054 INFO L93 Difference]: Finished difference Result 6903 states and 16158 transitions. [2021-06-05 15:34:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:34:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:34:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:01,061 INFO L225 Difference]: With dead ends: 6903 [2021-06-05 15:34:01,061 INFO L226 Difference]: Without dead ends: 6899 [2021-06-05 15:34:01,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2326.9ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 15:34:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-05 15:34:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4480. [2021-06-05 15:34:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 2.444965394061174) internal successors, (10951), 4479 states have internal predecessors, (10951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 10951 transitions. [2021-06-05 15:34:01,117 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 10951 transitions. Word has length 47 [2021-06-05 15:34:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:01,117 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 10951 transitions. [2021-06-05 15:34:01,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 10951 transitions. [2021-06-05 15:34:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:34:01,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:01,123 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:01,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 15:34:01,325 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 56 times [2021-06-05 15:34:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:01,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811627529] [2021-06-05 15:34:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:01,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:01,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811627529] [2021-06-05 15:34:01,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811627529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:01,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858396811] [2021-06-05 15:34:01,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:01,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:34:01,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:01,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:34:01,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:02,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858396811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:02,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:02,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 15:34:02,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460918766] [2021-06-05 15:34:02,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:34:02,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:34:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:34:02,049 INFO L87 Difference]: Start difference. First operand 4480 states and 10951 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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) [2021-06-05 15:34:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:06,596 INFO L93 Difference]: Finished difference Result 10549 states and 24047 transitions. [2021-06-05 15:34:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 15:34:06,596 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:34:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:06,606 INFO L225 Difference]: With dead ends: 10549 [2021-06-05 15:34:06,606 INFO L226 Difference]: Without dead ends: 10501 [2021-06-05 15:34:06,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 3057.6ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 15:34:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-05 15:34:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 4420. [2021-06-05 15:34:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 2.4433129667345552) internal successors, (10797), 4419 states have internal predecessors, (10797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 10797 transitions. [2021-06-05 15:34:06,690 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 10797 transitions. Word has length 47 [2021-06-05 15:34:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:06,690 INFO L482 AbstractCegarLoop]: Abstraction has 4420 states and 10797 transitions. [2021-06-05 15:34:06,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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) [2021-06-05 15:34:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 10797 transitions. [2021-06-05 15:34:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:34:06,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:06,693 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:06,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 15:34:06,897 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 57 times [2021-06-05 15:34:06,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:06,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783413168] [2021-06-05 15:34:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:07,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:07,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783413168] [2021-06-05 15:34:07,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783413168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:07,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689227461] [2021-06-05 15:34:07,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:34:07,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 15:34:07,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:07,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:34:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:07,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689227461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:07,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:07,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-06-05 15:34:07,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765638861] [2021-06-05 15:34:07,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:34:07,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:34:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:34:07,620 INFO L87 Difference]: Start difference. First operand 4420 states and 10797 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 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) [2021-06-05 15:34:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:12,078 INFO L93 Difference]: Finished difference Result 12102 states and 27344 transitions. [2021-06-05 15:34:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 15:34:12,078 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:34:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:12,090 INFO L225 Difference]: With dead ends: 12102 [2021-06-05 15:34:12,090 INFO L226 Difference]: Without dead ends: 12024 [2021-06-05 15:34:12,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 3174.7ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 15:34:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-06-05 15:34:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 4352. [2021-06-05 15:34:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 2.4474833371638702) internal successors, (10649), 4351 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 10649 transitions. [2021-06-05 15:34:12,173 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 10649 transitions. Word has length 47 [2021-06-05 15:34:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:12,173 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 10649 transitions. [2021-06-05 15:34:12,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 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) [2021-06-05 15:34:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 10649 transitions. [2021-06-05 15:34:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:34:12,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:12,177 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:12,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:12,377 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 58 times [2021-06-05 15:34:12,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:12,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739500950] [2021-06-05 15:34:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:12,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739500950] [2021-06-05 15:34:12,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739500950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670482096] [2021-06-05 15:34:12,580 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 [2021-06-05 15:34:12,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:34:12,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 15:34:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:13,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670482096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:13,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:13,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-06-05 15:34:13,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833876397] [2021-06-05 15:34:13,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:34:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:34:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:34:13,124 INFO L87 Difference]: Start difference. First operand 4352 states and 10649 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 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) [2021-06-05 15:34:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:15,949 INFO L93 Difference]: Finished difference Result 14421 states and 32596 transitions. [2021-06-05 15:34:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 15:34:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:34:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:15,967 INFO L225 Difference]: With dead ends: 14421 [2021-06-05 15:34:15,967 INFO L226 Difference]: Without dead ends: 14229 [2021-06-05 15:34:15,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 2402.2ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 15:34:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14229 states. [2021-06-05 15:34:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14229 to 4384. [2021-06-05 15:34:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4442162902121836) internal successors, (10713), 4383 states have internal predecessors, (10713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10713 transitions. [2021-06-05 15:34:16,073 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10713 transitions. Word has length 47 [2021-06-05 15:34:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:16,073 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 10713 transitions. [2021-06-05 15:34:16,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 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) [2021-06-05 15:34:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10713 transitions. [2021-06-05 15:34:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:34:16,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:16,077 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:16,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 15:34:16,277 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 59 times [2021-06-05 15:34:16,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:16,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252696639] [2021-06-05 15:34:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:16,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:16,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252696639] [2021-06-05 15:34:16,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252696639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:16,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836437946] [2021-06-05 15:34:16,464 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 [2021-06-05 15:34:16,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 15:34:16,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:34:16,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:16,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836437946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:16,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:16,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-06-05 15:34:16,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022005165] [2021-06-05 15:34:16,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:34:16,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:16,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:34:16,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:34:16,960 INFO L87 Difference]: Start difference. First operand 4384 states and 10713 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:20,280 INFO L93 Difference]: Finished difference Result 14220 states and 31957 transitions. [2021-06-05 15:34:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-05 15:34:20,281 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:34:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:20,296 INFO L225 Difference]: With dead ends: 14220 [2021-06-05 15:34:20,296 INFO L226 Difference]: Without dead ends: 13917 [2021-06-05 15:34:20,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 2801.8ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-06-05 15:34:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2021-06-05 15:34:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 4404. [2021-06-05 15:34:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.4421985010220304) internal successors, (10753), 4403 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 10753 transitions. [2021-06-05 15:34:20,384 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 10753 transitions. Word has length 47 [2021-06-05 15:34:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:20,385 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 10753 transitions. [2021-06-05 15:34:20,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 10753 transitions. [2021-06-05 15:34:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:34:20,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:20,388 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:20,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:20,588 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 60 times [2021-06-05 15:34:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:20,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778091985] [2021-06-05 15:34:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:20,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:20,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778091985] [2021-06-05 15:34:20,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778091985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:20,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657869534] [2021-06-05 15:34:20,784 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 [2021-06-05 15:34:20,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 15:34:20,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:20,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:34:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:21,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657869534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:21,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:21,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 15:34:21,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762798172] [2021-06-05 15:34:21,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:34:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:34:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:34:21,334 INFO L87 Difference]: Start difference. First operand 4404 states and 10753 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 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) [2021-06-05 15:34:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:24,782 INFO L93 Difference]: Finished difference Result 13609 states and 30879 transitions. [2021-06-05 15:34:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 15:34:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:34:24,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:24,797 INFO L225 Difference]: With dead ends: 13609 [2021-06-05 15:34:24,797 INFO L226 Difference]: Without dead ends: 13078 [2021-06-05 15:34:24,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8506 ImplicationChecksByTransitivity, 3113.0ms TimeCoverageRelationStatistics Valid=4891, Invalid=19289, Unknown=0, NotChecked=0, Total=24180 [2021-06-05 15:34:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-06-05 15:34:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 4605. [2021-06-05 15:34:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.386185925282363) internal successors, (10986), 4604 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 10986 transitions. [2021-06-05 15:34:24,879 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 10986 transitions. Word has length 47 [2021-06-05 15:34:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:24,879 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 10986 transitions. [2021-06-05 15:34:24,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 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) [2021-06-05 15:34:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 10986 transitions. [2021-06-05 15:34:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:34:24,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:24,883 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:25,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 15:34:25,084 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 61 times [2021-06-05 15:34:25,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:25,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545900368] [2021-06-05 15:34:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:25,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:25,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545900368] [2021-06-05 15:34:25,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545900368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:25,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630289560] [2021-06-05 15:34:25,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:25,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 15:34:25,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:25,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630289560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:25,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:25,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2021-06-05 15:34:25,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642959650] [2021-06-05 15:34:25,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:34:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:25,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:34:25,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:34:25,636 INFO L87 Difference]: Start difference. First operand 4605 states and 10986 transitions. Second operand has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:28,377 INFO L93 Difference]: Finished difference Result 9014 states and 20637 transitions. [2021-06-05 15:34:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 15:34:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:34:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:28,386 INFO L225 Difference]: With dead ends: 9014 [2021-06-05 15:34:28,386 INFO L226 Difference]: Without dead ends: 9010 [2021-06-05 15:34:28,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6196 ImplicationChecksByTransitivity, 2461.0ms TimeCoverageRelationStatistics Valid=3809, Invalid=13221, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 15:34:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-06-05 15:34:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4724. [2021-06-05 15:34:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 2.4084268473427906) internal successors, (11375), 4723 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 11375 transitions. [2021-06-05 15:34:28,451 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 11375 transitions. Word has length 47 [2021-06-05 15:34:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:28,452 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 11375 transitions. [2021-06-05 15:34:28,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 11375 transitions. [2021-06-05 15:34:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:28,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:28,456 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:28,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:28,656 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 62 times [2021-06-05 15:34:28,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:28,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848222063] [2021-06-05 15:34:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:28,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:28,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848222063] [2021-06-05 15:34:28,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848222063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:28,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790447939] [2021-06-05 15:34:28,878 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 [2021-06-05 15:34:28,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:34:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 15:34:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:29,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790447939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:29,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:29,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-06-05 15:34:29,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633815436] [2021-06-05 15:34:29,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:34:29,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:34:29,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:34:29,461 INFO L87 Difference]: Start difference. First operand 4724 states and 11375 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:32,984 INFO L93 Difference]: Finished difference Result 6691 states and 15329 transitions. [2021-06-05 15:34:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 15:34:32,984 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:32,990 INFO L225 Difference]: With dead ends: 6691 [2021-06-05 15:34:32,990 INFO L226 Difference]: Without dead ends: 6421 [2021-06-05 15:34:32,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 3224.8ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 15:34:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-05 15:34:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4591. [2021-06-05 15:34:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 2.4004357298474948) internal successors, (11018), 4590 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 11018 transitions. [2021-06-05 15:34:33,066 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 11018 transitions. Word has length 49 [2021-06-05 15:34:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:33,067 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 11018 transitions. [2021-06-05 15:34:33,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 11018 transitions. [2021-06-05 15:34:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:33,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:33,071 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:33,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 15:34:33,285 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 63 times [2021-06-05 15:34:33,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:33,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459739132] [2021-06-05 15:34:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:33,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:33,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459739132] [2021-06-05 15:34:33,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459739132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:33,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561380006] [2021-06-05 15:34:33,406 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 [2021-06-05 15:34:33,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 15:34:33,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:33,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:34:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 17 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:34,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561380006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:34,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:34,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2021-06-05 15:34:34,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688796676] [2021-06-05 15:34:34,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:34:34,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:34,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:34:34,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:34:34,057 INFO L87 Difference]: Start difference. First operand 4591 states and 11018 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 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) [2021-06-05 15:34:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:39,827 INFO L93 Difference]: Finished difference Result 8254 states and 18601 transitions. [2021-06-05 15:34:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-06-05 15:34:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:39,835 INFO L225 Difference]: With dead ends: 8254 [2021-06-05 15:34:39,835 INFO L226 Difference]: Without dead ends: 8250 [2021-06-05 15:34:39,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19820 ImplicationChecksByTransitivity, 5154.1ms TimeCoverageRelationStatistics Valid=9481, Invalid=36529, Unknown=0, NotChecked=0, Total=46010 [2021-06-05 15:34:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-06-05 15:34:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 4599. [2021-06-05 15:34:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4598 states have (on average 2.4006089604175727) internal successors, (11038), 4598 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 11038 transitions. [2021-06-05 15:34:39,893 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 11038 transitions. Word has length 49 [2021-06-05 15:34:39,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:39,893 INFO L482 AbstractCegarLoop]: Abstraction has 4599 states and 11038 transitions. [2021-06-05 15:34:39,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 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) [2021-06-05 15:34:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 11038 transitions. [2021-06-05 15:34:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:34:39,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:39,897 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:40,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:40,097 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 64 times [2021-06-05 15:34:40,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:40,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697959805] [2021-06-05 15:34:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:40,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:40,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697959805] [2021-06-05 15:34:40,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697959805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:40,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516260111] [2021-06-05 15:34:40,215 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 [2021-06-05 15:34:40,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:34:40,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:40,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 15:34:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:40,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516260111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:40,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:40,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 15:34:40,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846433360] [2021-06-05 15:34:40,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:34:40,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:34:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:34:40,320 INFO L87 Difference]: Start difference. First operand 4599 states and 11038 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:40,457 INFO L93 Difference]: Finished difference Result 5889 states and 14053 transitions. [2021-06-05 15:34:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:34:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:34:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:40,463 INFO L225 Difference]: With dead ends: 5889 [2021-06-05 15:34:40,464 INFO L226 Difference]: Without dead ends: 5820 [2021-06-05 15:34:40,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:34:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-06-05 15:34:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5433. [2021-06-05 15:34:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.43740795287187) internal successors, (13240), 5432 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 13240 transitions. [2021-06-05 15:34:40,536 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 13240 transitions. Word has length 51 [2021-06-05 15:34:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:40,536 INFO L482 AbstractCegarLoop]: Abstraction has 5433 states and 13240 transitions. [2021-06-05 15:34:40,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 13240 transitions. [2021-06-05 15:34:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:34:40,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:40,541 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:40,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 15:34:40,741 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 65 times [2021-06-05 15:34:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:40,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205459205] [2021-06-05 15:34:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:41,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:41,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205459205] [2021-06-05 15:34:41,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205459205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:41,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322897340] [2021-06-05 15:34:41,061 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 [2021-06-05 15:34:41,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 15:34:41,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:34:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:41,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322897340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:41,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:41,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-05 15:34:41,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740457204] [2021-06-05 15:34:41,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:34:41,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:34:41,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:34:41,779 INFO L87 Difference]: Start difference. First operand 5433 states and 13240 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:45,257 INFO L93 Difference]: Finished difference Result 7094 states and 16636 transitions. [2021-06-05 15:34:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:34:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:34:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:45,268 INFO L225 Difference]: With dead ends: 7094 [2021-06-05 15:34:45,268 INFO L226 Difference]: Without dead ends: 7088 [2021-06-05 15:34:45,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2789.2ms TimeCoverageRelationStatistics Valid=1100, Invalid=12706, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 15:34:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-06-05 15:34:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 5314. [2021-06-05 15:34:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 5313 states have (on average 2.43553547901374) internal successors, (12940), 5313 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 12940 transitions. [2021-06-05 15:34:45,418 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 12940 transitions. Word has length 51 [2021-06-05 15:34:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:45,419 INFO L482 AbstractCegarLoop]: Abstraction has 5314 states and 12940 transitions. [2021-06-05 15:34:45,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 12940 transitions. [2021-06-05 15:34:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:34:45,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:45,424 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:45,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 15:34:45,641 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:45,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 66 times [2021-06-05 15:34:45,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:45,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782074764] [2021-06-05 15:34:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:45,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:45,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782074764] [2021-06-05 15:34:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782074764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:45,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336073573] [2021-06-05 15:34:45,867 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 [2021-06-05 15:34:45,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 15:34:45,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:34:45,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:46,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336073573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:46,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:46,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-06-05 15:34:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956859708] [2021-06-05 15:34:46,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:34:46,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:46,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:34:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:34:46,496 INFO L87 Difference]: Start difference. First operand 5314 states and 12940 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:51,230 INFO L93 Difference]: Finished difference Result 10585 states and 24178 transitions. [2021-06-05 15:34:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 15:34:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:34:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:51,240 INFO L225 Difference]: With dead ends: 10585 [2021-06-05 15:34:51,240 INFO L226 Difference]: Without dead ends: 10561 [2021-06-05 15:34:51,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 3150.8ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 15:34:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-05 15:34:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 5782. [2021-06-05 15:34:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5782 states, 5781 states have (on average 2.44075419477599) internal successors, (14110), 5781 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 14110 transitions. [2021-06-05 15:34:51,324 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 14110 transitions. Word has length 51 [2021-06-05 15:34:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:51,324 INFO L482 AbstractCegarLoop]: Abstraction has 5782 states and 14110 transitions. [2021-06-05 15:34:51,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 14110 transitions. [2021-06-05 15:34:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:34:51,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:51,329 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:51,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 15:34:51,545 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 67 times [2021-06-05 15:34:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:51,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605456181] [2021-06-05 15:34:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:51,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:51,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605456181] [2021-06-05 15:34:51,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605456181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:51,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617164497] [2021-06-05 15:34:51,738 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 [2021-06-05 15:34:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:34:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:52,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617164497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:52,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:52,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-06-05 15:34:52,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150657048] [2021-06-05 15:34:52,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:34:52,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:52,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:34:52,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:34:52,344 INFO L87 Difference]: Start difference. First operand 5782 states and 14110 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:56,152 INFO L93 Difference]: Finished difference Result 8201 states and 19178 transitions. [2021-06-05 15:34:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 15:34:56,152 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:34:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:56,159 INFO L225 Difference]: With dead ends: 8201 [2021-06-05 15:34:56,159 INFO L226 Difference]: Without dead ends: 8197 [2021-06-05 15:34:56,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 2627.5ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 15:34:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-06-05 15:34:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 5452. [2021-06-05 15:34:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 2.439185470555861) internal successors, (13296), 5451 states have internal predecessors, (13296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 13296 transitions. [2021-06-05 15:34:56,228 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 13296 transitions. Word has length 51 [2021-06-05 15:34:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:56,228 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 13296 transitions. [2021-06-05 15:34:56,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 13296 transitions. [2021-06-05 15:34:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:34:56,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:56,233 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:56,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:56,456 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:56,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 68 times [2021-06-05 15:34:56,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:56,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753378937] [2021-06-05 15:34:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:56,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:56,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753378937] [2021-06-05 15:34:56,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753378937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:56,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671206653] [2021-06-05 15:34:56,640 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 [2021-06-05 15:34:56,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:34:56,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:56,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:34:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:57,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671206653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:57,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:57,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-06-05 15:34:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016212184] [2021-06-05 15:34:57,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 15:34:57,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:57,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 15:34:57,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:34:57,233 INFO L87 Difference]: Start difference. First operand 5452 states and 13296 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:02,915 INFO L93 Difference]: Finished difference Result 12411 states and 28171 transitions. [2021-06-05 15:35:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 15:35:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:35:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:02,928 INFO L225 Difference]: With dead ends: 12411 [2021-06-05 15:35:02,929 INFO L226 Difference]: Without dead ends: 12363 [2021-06-05 15:35:02,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 3728.1ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 15:35:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2021-06-05 15:35:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 5448. [2021-06-05 15:35:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.4384064622728108) internal successors, (13282), 5447 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 13282 transitions. [2021-06-05 15:35:03,015 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 13282 transitions. Word has length 51 [2021-06-05 15:35:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 13282 transitions. [2021-06-05 15:35:03,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 13282 transitions. [2021-06-05 15:35:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:35:03,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:03,020 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:03,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:03,220 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 69 times [2021-06-05 15:35:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:03,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320328668] [2021-06-05 15:35:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:03,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:03,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320328668] [2021-06-05 15:35:03,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320328668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:03,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043540408] [2021-06-05 15:35:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:03,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 15:35:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:03,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:35:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:04,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043540408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:04,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:04,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-06-05 15:35:04,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420992417] [2021-06-05 15:35:04,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:35:04,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:04,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:35:04,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:35:04,006 INFO L87 Difference]: Start difference. First operand 5448 states and 13282 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:09,921 INFO L93 Difference]: Finished difference Result 15077 states and 34147 transitions. [2021-06-05 15:35:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 15:35:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:35:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:09,937 INFO L225 Difference]: With dead ends: 15077 [2021-06-05 15:35:09,938 INFO L226 Difference]: Without dead ends: 14999 [2021-06-05 15:35:09,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 4057.5ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-06-05 15:35:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14999 states. [2021-06-05 15:35:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14999 to 5335. [2021-06-05 15:35:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5334 states have (on average 2.4401949756280463) internal successors, (13016), 5334 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 13016 transitions. [2021-06-05 15:35:10,057 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 13016 transitions. Word has length 51 [2021-06-05 15:35:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:10,057 INFO L482 AbstractCegarLoop]: Abstraction has 5335 states and 13016 transitions. [2021-06-05 15:35:10,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 13016 transitions. [2021-06-05 15:35:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:35:10,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:10,062 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:10,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 15:35:10,263 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 70 times [2021-06-05 15:35:10,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:10,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193438424] [2021-06-05 15:35:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:10,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:10,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193438424] [2021-06-05 15:35:10,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193438424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:10,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014660529] [2021-06-05 15:35:10,450 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 [2021-06-05 15:35:10,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:35:10,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:35:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014660529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:10,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:10,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-06-05 15:35:10,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578577136] [2021-06-05 15:35:10,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:35:10,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:35:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:35:10,997 INFO L87 Difference]: Start difference. First operand 5335 states and 13016 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:15,562 INFO L93 Difference]: Finished difference Result 16843 states and 37762 transitions. [2021-06-05 15:35:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-05 15:35:15,562 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:35:15,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:15,578 INFO L225 Difference]: With dead ends: 16843 [2021-06-05 15:35:15,578 INFO L226 Difference]: Without dead ends: 16573 [2021-06-05 15:35:15,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 3507.4ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 15:35:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2021-06-05 15:35:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 5289. [2021-06-05 15:35:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 2.440998487140696) internal successors, (12908), 5288 states have internal predecessors, (12908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 12908 transitions. [2021-06-05 15:35:15,675 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 12908 transitions. Word has length 51 [2021-06-05 15:35:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:15,676 INFO L482 AbstractCegarLoop]: Abstraction has 5289 states and 12908 transitions. [2021-06-05 15:35:15,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 12908 transitions. [2021-06-05 15:35:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:35:15,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:15,679 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:15,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 15:35:15,880 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 71 times [2021-06-05 15:35:15,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:15,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373185750] [2021-06-05 15:35:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:16,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:16,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373185750] [2021-06-05 15:35:16,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373185750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:16,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597553049] [2021-06-05 15:35:16,081 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 [2021-06-05 15:35:16,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 15:35:16,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:35:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:16,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597553049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:16,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:16,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-06-05 15:35:16,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954748074] [2021-06-05 15:35:16,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:35:16,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:35:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:35:16,642 INFO L87 Difference]: Start difference. First operand 5289 states and 12908 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:20,439 INFO L93 Difference]: Finished difference Result 18875 states and 42539 transitions. [2021-06-05 15:35:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 15:35:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:35:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:20,458 INFO L225 Difference]: With dead ends: 18875 [2021-06-05 15:35:20,458 INFO L226 Difference]: Without dead ends: 18587 [2021-06-05 15:35:20,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9833 ImplicationChecksByTransitivity, 3155.5ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 15:35:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18587 states. [2021-06-05 15:35:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18587 to 5317. [2021-06-05 15:35:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5316 states have (on average 2.438675696012039) internal successors, (12964), 5316 states have internal predecessors, (12964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 12964 transitions. [2021-06-05 15:35:20,565 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 12964 transitions. Word has length 51 [2021-06-05 15:35:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:20,565 INFO L482 AbstractCegarLoop]: Abstraction has 5317 states and 12964 transitions. [2021-06-05 15:35:20,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 12964 transitions. [2021-06-05 15:35:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:35:20,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:20,569 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:20,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:20,770 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 72 times [2021-06-05 15:35:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:20,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948612051] [2021-06-05 15:35:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:20,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:20,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948612051] [2021-06-05 15:35:20,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948612051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:20,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750207020] [2021-06-05 15:35:20,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:35:21,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:35:21,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:35:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:21,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750207020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:21,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:21,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-06-05 15:35:21,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301251707] [2021-06-05 15:35:21,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:35:21,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:21,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:35:21,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:35:21,547 INFO L87 Difference]: Start difference. First operand 5317 states and 12964 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:25,516 INFO L93 Difference]: Finished difference Result 16588 states and 36726 transitions. [2021-06-05 15:35:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-06-05 15:35:25,516 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:35:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:25,532 INFO L225 Difference]: With dead ends: 16588 [2021-06-05 15:35:25,532 INFO L226 Difference]: Without dead ends: 16174 [2021-06-05 15:35:25,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 3453.5ms TimeCoverageRelationStatistics Valid=5931, Invalid=25575, Unknown=0, NotChecked=0, Total=31506 [2021-06-05 15:35:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2021-06-05 15:35:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 5337. [2021-06-05 15:35:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 2.437031484257871) internal successors, (13004), 5336 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 13004 transitions. [2021-06-05 15:35:25,624 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 13004 transitions. Word has length 51 [2021-06-05 15:35:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:25,624 INFO L482 AbstractCegarLoop]: Abstraction has 5337 states and 13004 transitions. [2021-06-05 15:35:25,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 13004 transitions. [2021-06-05 15:35:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:35:25,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:25,627 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:25,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:25,827 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 73 times [2021-06-05 15:35:25,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:25,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815335183] [2021-06-05 15:35:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:26,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:26,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815335183] [2021-06-05 15:35:26,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815335183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:26,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72698598] [2021-06-05 15:35:26,049 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 [2021-06-05 15:35:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:35:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:26,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72698598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:26,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:26,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-05 15:35:26,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35124195] [2021-06-05 15:35:26,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:35:26,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:35:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:35:26,608 INFO L87 Difference]: Start difference. First operand 5337 states and 13004 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:30,410 INFO L93 Difference]: Finished difference Result 16800 states and 38164 transitions. [2021-06-05 15:35:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 15:35:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:35:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:30,425 INFO L225 Difference]: With dead ends: 16800 [2021-06-05 15:35:30,425 INFO L226 Difference]: Without dead ends: 16146 [2021-06-05 15:35:30,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 3334.9ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 15:35:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2021-06-05 15:35:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 4803. [2021-06-05 15:35:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 2.4123281965847565) internal successors, (11584), 4802 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 11584 transitions. [2021-06-05 15:35:30,518 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 11584 transitions. Word has length 51 [2021-06-05 15:35:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:30,519 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 11584 transitions. [2021-06-05 15:35:30,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 11584 transitions. [2021-06-05 15:35:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 15:35:30,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:30,522 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:30,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:30,722 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 74 times [2021-06-05 15:35:30,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:30,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776367220] [2021-06-05 15:35:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:30,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776367220] [2021-06-05 15:35:30,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776367220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:30,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203452767] [2021-06-05 15:35:30,944 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 [2021-06-05 15:35:30,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:35:30,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:30,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:35:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203452767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:31,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:31,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-06-05 15:35:31,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186796880] [2021-06-05 15:35:31,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:35:31,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:31,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:35:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:35:31,564 INFO L87 Difference]: Start difference. First operand 4803 states and 11584 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:35,921 INFO L93 Difference]: Finished difference Result 6738 states and 15323 transitions. [2021-06-05 15:35:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 15:35:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 15:35:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:35,928 INFO L225 Difference]: With dead ends: 6738 [2021-06-05 15:35:35,928 INFO L226 Difference]: Without dead ends: 6426 [2021-06-05 15:35:35,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 3949.3ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-06-05 15:35:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-06-05 15:35:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 4802. [2021-06-05 15:35:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409289731305978) internal successors, (11567), 4801 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11567 transitions. [2021-06-05 15:35:35,979 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11567 transitions. Word has length 53 [2021-06-05 15:35:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:35,979 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11567 transitions. [2021-06-05 15:35:35,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11567 transitions. [2021-06-05 15:35:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 15:35:35,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:35,983 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:36,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:36,205 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 75 times [2021-06-05 15:35:36,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:36,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399005714] [2021-06-05 15:35:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:36,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399005714] [2021-06-05 15:35:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399005714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749748843] [2021-06-05 15:35:36,334 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 [2021-06-05 15:35:36,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 15:35:36,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:35:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:37,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749748843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:37,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:37,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-06-05 15:35:37,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032725937] [2021-06-05 15:35:37,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:35:37,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:35:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:35:37,013 INFO L87 Difference]: Start difference. First operand 4802 states and 11567 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:44,412 INFO L93 Difference]: Finished difference Result 6316 states and 14547 transitions. [2021-06-05 15:35:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-05 15:35:44,412 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 15:35:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:44,418 INFO L225 Difference]: With dead ends: 6316 [2021-06-05 15:35:44,418 INFO L226 Difference]: Without dead ends: 6312 [2021-06-05 15:35:44,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 7011.8ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-06-05 15:35:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-06-05 15:35:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 4802. [2021-06-05 15:35:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409081441366382) internal successors, (11566), 4801 states have internal predecessors, (11566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11566 transitions. [2021-06-05 15:35:44,469 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11566 transitions. Word has length 53 [2021-06-05 15:35:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:44,469 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11566 transitions. [2021-06-05 15:35:44,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11566 transitions. [2021-06-05 15:35:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:35:44,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:44,472 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:44,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:44,673 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 76 times [2021-06-05 15:35:44,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:44,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906152826] [2021-06-05 15:35:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:44,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:44,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906152826] [2021-06-05 15:35:44,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906152826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:44,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525240444] [2021-06-05 15:35:44,801 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 [2021-06-05 15:35:44,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:35:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:35:44,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:44,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525240444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:44,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:44,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 15:35:44,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826427365] [2021-06-05 15:35:44,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:35:44,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:44,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:35:44,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:35:44,910 INFO L87 Difference]: Start difference. First operand 4802 states and 11566 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:45,060 INFO L93 Difference]: Finished difference Result 6109 states and 14541 transitions. [2021-06-05 15:35:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:35:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:35:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:45,066 INFO L225 Difference]: With dead ends: 6109 [2021-06-05 15:35:45,066 INFO L226 Difference]: Without dead ends: 6034 [2021-06-05 15:35:45,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:35:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2021-06-05 15:35:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5577. [2021-06-05 15:35:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5576 states have (on average 2.438307030129125) internal successors, (13596), 5576 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 13596 transitions. [2021-06-05 15:35:45,127 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 13596 transitions. Word has length 55 [2021-06-05 15:35:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:45,127 INFO L482 AbstractCegarLoop]: Abstraction has 5577 states and 13596 transitions. [2021-06-05 15:35:45,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 13596 transitions. [2021-06-05 15:35:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:35:45,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:45,130 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:45,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:45,331 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 77 times [2021-06-05 15:35:45,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:45,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771927329] [2021-06-05 15:35:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:45,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:45,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771927329] [2021-06-05 15:35:45,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771927329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:45,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415227390] [2021-06-05 15:35:45,696 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 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 [2021-06-05 15:35:45,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 15:35:45,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:45,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:35:45,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:46,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415227390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:46,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:46,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-05 15:35:46,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508186843] [2021-06-05 15:35:46,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 15:35:46,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:46,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 15:35:46,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:35:46,511 INFO L87 Difference]: Start difference. First operand 5577 states and 13596 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:50,816 INFO L93 Difference]: Finished difference Result 7325 states and 17131 transitions. [2021-06-05 15:35:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 15:35:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:35:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:50,824 INFO L225 Difference]: With dead ends: 7325 [2021-06-05 15:35:50,824 INFO L226 Difference]: Without dead ends: 7319 [2021-06-05 15:35:50,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 3294.1ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 15:35:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-06-05 15:35:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5539. [2021-06-05 15:35:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 5538 states have (on average 2.438605994944023) internal successors, (13505), 5538 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 13505 transitions. [2021-06-05 15:35:50,881 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 13505 transitions. Word has length 55 [2021-06-05 15:35:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:50,881 INFO L482 AbstractCegarLoop]: Abstraction has 5539 states and 13505 transitions. [2021-06-05 15:35:50,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 13505 transitions. [2021-06-05 15:35:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:35:50,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:50,885 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:51,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 15:35:51,086 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 78 times [2021-06-05 15:35:51,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:51,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462109726] [2021-06-05 15:35:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:51,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:51,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462109726] [2021-06-05 15:35:51,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462109726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:51,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387072673] [2021-06-05 15:35:51,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:51,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 15:35:51,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:51,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:35:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:52,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387072673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:52,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:52,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-06-05 15:35:52,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404969920] [2021-06-05 15:35:52,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:35:52,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:52,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:35:52,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:35:52,018 INFO L87 Difference]: Start difference. First operand 5539 states and 13505 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:57,474 INFO L93 Difference]: Finished difference Result 10773 states and 24488 transitions. [2021-06-05 15:35:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 15:35:57,474 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:35:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:57,485 INFO L225 Difference]: With dead ends: 10773 [2021-06-05 15:35:57,485 INFO L226 Difference]: Without dead ends: 10749 [2021-06-05 15:35:57,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 3615.6ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 15:35:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-06-05 15:35:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 5893. [2021-06-05 15:35:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 2.4414460285132384) internal successors, (14385), 5892 states have internal predecessors, (14385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 14385 transitions. [2021-06-05 15:35:57,565 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 14385 transitions. Word has length 55 [2021-06-05 15:35:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:57,565 INFO L482 AbstractCegarLoop]: Abstraction has 5893 states and 14385 transitions. [2021-06-05 15:35:57,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 14385 transitions. [2021-06-05 15:35:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:35:57,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:57,569 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:57,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:57,769 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 79 times [2021-06-05 15:35:57,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:57,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775867474] [2021-06-05 15:35:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:57,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:57,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775867474] [2021-06-05 15:35:57,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775867474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:57,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263501091] [2021-06-05 15:35:57,967 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 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 [2021-06-05 15:35:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:57,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:35:57,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263501091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:58,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:58,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-06-05 15:35:58,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323214071] [2021-06-05 15:35:58,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:35:58,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:58,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:35:58,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:35:58,680 INFO L87 Difference]: Start difference. First operand 5893 states and 14385 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:03,545 INFO L93 Difference]: Finished difference Result 8165 states and 19006 transitions. [2021-06-05 15:36:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 15:36:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:03,553 INFO L225 Difference]: With dead ends: 8165 [2021-06-05 15:36:03,553 INFO L226 Difference]: Without dead ends: 8161 [2021-06-05 15:36:03,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 3089.2ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 15:36:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-06-05 15:36:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 5628. [2021-06-05 15:36:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 2.438955038208637) internal successors, (13724), 5627 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 13724 transitions. [2021-06-05 15:36:03,617 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 13724 transitions. Word has length 55 [2021-06-05 15:36:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:03,617 INFO L482 AbstractCegarLoop]: Abstraction has 5628 states and 13724 transitions. [2021-06-05 15:36:03,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 13724 transitions. [2021-06-05 15:36:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:03,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:03,621 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:03,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:03,821 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:03,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 80 times [2021-06-05 15:36:03,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:03,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310493296] [2021-06-05 15:36:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:04,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310493296] [2021-06-05 15:36:04,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310493296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112847274] [2021-06-05 15:36:04,047 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 [2021-06-05 15:36:04,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:36:04,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:36:04,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112847274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:04,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:04,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-06-05 15:36:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308466589] [2021-06-05 15:36:04,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:36:04,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:36:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:36:04,730 INFO L87 Difference]: Start difference. First operand 5628 states and 13724 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:12,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:12,262 INFO L93 Difference]: Finished difference Result 12946 states and 29248 transitions. [2021-06-05 15:36:12,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-05 15:36:12,263 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:12,276 INFO L225 Difference]: With dead ends: 12946 [2021-06-05 15:36:12,276 INFO L226 Difference]: Without dead ends: 12898 [2021-06-05 15:36:12,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 4465.4ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-06-05 15:36:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2021-06-05 15:36:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 5600. [2021-06-05 15:36:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.4365065190212536) internal successors, (13642), 5599 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 13642 transitions. [2021-06-05 15:36:12,359 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 13642 transitions. Word has length 55 [2021-06-05 15:36:12,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:12,359 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 13642 transitions. [2021-06-05 15:36:12,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 13642 transitions. [2021-06-05 15:36:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:12,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:12,363 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:12,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 15:36:12,563 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:12,564 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 81 times [2021-06-05 15:36:12,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:12,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850697401] [2021-06-05 15:36:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:12,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:12,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850697401] [2021-06-05 15:36:12,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850697401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:12,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732346772] [2021-06-05 15:36:12,805 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 [2021-06-05 15:36:12,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 15:36:12,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:36:12,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:13,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732346772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:13,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:13,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-06-05 15:36:13,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945098435] [2021-06-05 15:36:13,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:36:13,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:36:13,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:36:13,480 INFO L87 Difference]: Start difference. First operand 5600 states and 13642 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:20,532 INFO L93 Difference]: Finished difference Result 14970 states and 33594 transitions. [2021-06-05 15:36:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-05 15:36:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:20,546 INFO L225 Difference]: With dead ends: 14970 [2021-06-05 15:36:20,546 INFO L226 Difference]: Without dead ends: 14892 [2021-06-05 15:36:20,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16664 ImplicationChecksByTransitivity, 5042.2ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-06-05 15:36:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-06-05 15:36:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 5524. [2021-06-05 15:36:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4349085641861308) internal successors, (13448), 5523 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13448 transitions. [2021-06-05 15:36:20,629 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13448 transitions. Word has length 55 [2021-06-05 15:36:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:20,629 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13448 transitions. [2021-06-05 15:36:20,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13448 transitions. [2021-06-05 15:36:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:20,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:20,632 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:20,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:20,832 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 82 times [2021-06-05 15:36:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:20,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427726168] [2021-06-05 15:36:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:21,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:21,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427726168] [2021-06-05 15:36:21,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427726168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:21,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259386243] [2021-06-05 15:36:21,042 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 [2021-06-05 15:36:21,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:36:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:36:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:21,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259386243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:21,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:21,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-06-05 15:36:21,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351514803] [2021-06-05 15:36:21,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:36:21,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:36:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:36:21,711 INFO L87 Difference]: Start difference. First operand 5524 states and 13448 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:28,069 INFO L93 Difference]: Finished difference Result 18186 states and 40794 transitions. [2021-06-05 15:36:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 15:36:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:28,088 INFO L225 Difference]: With dead ends: 18186 [2021-06-05 15:36:28,088 INFO L226 Difference]: Without dead ends: 18072 [2021-06-05 15:36:28,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15389 ImplicationChecksByTransitivity, 4602.2ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-06-05 15:36:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18072 states. [2021-06-05 15:36:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18072 to 5412. [2021-06-05 15:36:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.4405839955645905) internal successors, (13206), 5411 states have internal predecessors, (13206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 13206 transitions. [2021-06-05 15:36:28,191 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 13206 transitions. Word has length 55 [2021-06-05 15:36:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:28,192 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 13206 transitions. [2021-06-05 15:36:28,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 13206 transitions. [2021-06-05 15:36:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:28,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:28,195 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:28,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 15:36:28,395 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 83 times [2021-06-05 15:36:28,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:28,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398901320] [2021-06-05 15:36:28,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:28,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:28,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398901320] [2021-06-05 15:36:28,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398901320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:28,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379850247] [2021-06-05 15:36:28,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:28,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 15:36:28,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:36:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379850247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:29,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:29,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 47 [2021-06-05 15:36:29,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676864713] [2021-06-05 15:36:29,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:36:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:36:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:36:29,252 INFO L87 Difference]: Start difference. First operand 5412 states and 13206 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:33,563 INFO L93 Difference]: Finished difference Result 19113 states and 42468 transitions. [2021-06-05 15:36:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 15:36:33,563 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:33,581 INFO L225 Difference]: With dead ends: 19113 [2021-06-05 15:36:33,581 INFO L226 Difference]: Without dead ends: 18873 [2021-06-05 15:36:33,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 3501.6ms TimeCoverageRelationStatistics Valid=4545, Invalid=24867, Unknown=0, NotChecked=0, Total=29412 [2021-06-05 15:36:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2021-06-05 15:36:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 5360. [2021-06-05 15:36:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 2.4448591155066244) internal successors, (13102), 5359 states have internal predecessors, (13102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 13102 transitions. [2021-06-05 15:36:33,687 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 13102 transitions. Word has length 55 [2021-06-05 15:36:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:33,687 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 13102 transitions. [2021-06-05 15:36:33,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 13102 transitions. [2021-06-05 15:36:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:33,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:33,691 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:33,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 15:36:33,891 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 84 times [2021-06-05 15:36:33,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:33,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061678096] [2021-06-05 15:36:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:34,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:34,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061678096] [2021-06-05 15:36:34,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061678096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:34,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331353924] [2021-06-05 15:36:34,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:34,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 15:36:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:36:34,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:34,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331353924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:34,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:34,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-06-05 15:36:34,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314983815] [2021-06-05 15:36:34,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 15:36:34,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:34,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 15:36:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:36:34,792 INFO L87 Difference]: Start difference. First operand 5360 states and 13102 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:39,444 INFO L93 Difference]: Finished difference Result 18758 states and 41177 transitions. [2021-06-05 15:36:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 15:36:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:39,461 INFO L225 Difference]: With dead ends: 18758 [2021-06-05 15:36:39,461 INFO L226 Difference]: Without dead ends: 18353 [2021-06-05 15:36:39,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14275 ImplicationChecksByTransitivity, 3929.3ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-06-05 15:36:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-06-05 15:36:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5380. [2021-06-05 15:36:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 2.443205056701989) internal successors, (13142), 5379 states have internal predecessors, (13142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 13142 transitions. [2021-06-05 15:36:39,565 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 13142 transitions. Word has length 55 [2021-06-05 15:36:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:39,565 INFO L482 AbstractCegarLoop]: Abstraction has 5380 states and 13142 transitions. [2021-06-05 15:36:39,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 13142 transitions. [2021-06-05 15:36:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:39,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:39,568 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:39,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 15:36:39,769 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 85 times [2021-06-05 15:36:39,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:39,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613032423] [2021-06-05 15:36:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:40,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:40,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613032423] [2021-06-05 15:36:40,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613032423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:40,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972496769] [2021-06-05 15:36:40,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:36:40,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972496769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:40,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-06-05 15:36:40,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630848106] [2021-06-05 15:36:40,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 15:36:40,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 15:36:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:36:40,700 INFO L87 Difference]: Start difference. First operand 5380 states and 13142 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:45,260 INFO L93 Difference]: Finished difference Result 18854 states and 41231 transitions. [2021-06-05 15:36:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-05 15:36:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:45,277 INFO L225 Difference]: With dead ends: 18854 [2021-06-05 15:36:45,278 INFO L226 Difference]: Without dead ends: 18251 [2021-06-05 15:36:45,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 3968.7ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-06-05 15:36:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18251 states. [2021-06-05 15:36:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18251 to 5392. [2021-06-05 15:36:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 2.4422185123353737) internal successors, (13166), 5391 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 13166 transitions. [2021-06-05 15:36:45,374 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 13166 transitions. Word has length 55 [2021-06-05 15:36:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:45,374 INFO L482 AbstractCegarLoop]: Abstraction has 5392 states and 13166 transitions. [2021-06-05 15:36:45,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 13166 transitions. [2021-06-05 15:36:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:45,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:45,377 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:45,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:45,577 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:45,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 86 times [2021-06-05 15:36:45,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:45,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942549128] [2021-06-05 15:36:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:45,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:45,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942549128] [2021-06-05 15:36:45,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942549128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:45,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486618426] [2021-06-05 15:36:45,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:45,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:36:45,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:36:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:46,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486618426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:46,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:46,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-05 15:36:46,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504237714] [2021-06-05 15:36:46,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 15:36:46,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 15:36:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:36:46,427 INFO L87 Difference]: Start difference. First operand 5392 states and 13166 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:51,095 INFO L93 Difference]: Finished difference Result 15764 states and 34786 transitions. [2021-06-05 15:36:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 15:36:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:51,109 INFO L225 Difference]: With dead ends: 15764 [2021-06-05 15:36:51,110 INFO L226 Difference]: Without dead ends: 14963 [2021-06-05 15:36:51,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 4000.8ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 15:36:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14963 states. [2021-06-05 15:36:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14963 to 5551. [2021-06-05 15:36:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 2.4086486486486485) internal successors, (13368), 5550 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 13368 transitions. [2021-06-05 15:36:51,198 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 13368 transitions. Word has length 55 [2021-06-05 15:36:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:51,198 INFO L482 AbstractCegarLoop]: Abstraction has 5551 states and 13368 transitions. [2021-06-05 15:36:51,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 13368 transitions. [2021-06-05 15:36:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:36:51,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:51,201 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:36:51,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 15:36:51,402 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 335036743, now seen corresponding path program 87 times [2021-06-05 15:36:51,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:51,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694059368] [2021-06-05 15:36:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:51,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:51,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694059368] [2021-06-05 15:36:51,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694059368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:51,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39397985] [2021-06-05 15:36:51,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:51,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 15:36:51,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:36:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:52,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39397985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:52,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:52,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-06-05 15:36:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939852288] [2021-06-05 15:36:52,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 15:36:52,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:52,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 15:36:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:36:52,160 INFO L87 Difference]: Start difference. First operand 5551 states and 13368 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:59,808 INFO L93 Difference]: Finished difference Result 11259 states and 25238 transitions. [2021-06-05 15:36:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-05 15:36:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:36:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:59,818 INFO L225 Difference]: With dead ends: 11259 [2021-06-05 15:36:59,818 INFO L226 Difference]: Without dead ends: 11255 [2021-06-05 15:36:59,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32929 ImplicationChecksByTransitivity, 6932.3ms TimeCoverageRelationStatistics Valid=15649, Invalid=58063, Unknown=0, NotChecked=0, Total=73712 [2021-06-05 15:36:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2021-06-05 15:36:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 5626. [2021-06-05 15:36:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 2.4208) internal successors, (13617), 5625 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 13617 transitions. [2021-06-05 15:36:59,891 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 13617 transitions. Word has length 55 [2021-06-05 15:36:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:59,891 INFO L482 AbstractCegarLoop]: Abstraction has 5626 states and 13617 transitions. [2021-06-05 15:36:59,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:36:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 13617 transitions. [2021-06-05 15:36:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 15:36:59,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:59,895 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:00,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 15:37:00,095 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash 317372549, now seen corresponding path program 88 times [2021-06-05 15:37:00,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:00,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532015003] [2021-06-05 15:37:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:00,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532015003] [2021-06-05 15:37:00,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532015003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077295987] [2021-06-05 15:37:00,363 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 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 [2021-06-05 15:37:00,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:37:00,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:37:00,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:01,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077295987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:01,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:01,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-06-05 15:37:01,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585372858] [2021-06-05 15:37:01,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 15:37:01,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 15:37:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:37:01,019 INFO L87 Difference]: Start difference. First operand 5626 states and 13617 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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) [2021-06-05 15:37:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:06,628 INFO L93 Difference]: Finished difference Result 7916 states and 18052 transitions. [2021-06-05 15:37:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-06-05 15:37:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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) Word has length 57 [2021-06-05 15:37:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:06,634 INFO L225 Difference]: With dead ends: 7916 [2021-06-05 15:37:06,634 INFO L226 Difference]: Without dead ends: 7538 [2021-06-05 15:37:06,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 5011.5ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-06-05 15:37:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-06-05 15:37:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 5623. [2021-06-05 15:37:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.418000711490573) internal successors, (13594), 5622 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13594 transitions. [2021-06-05 15:37:06,691 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13594 transitions. Word has length 57 [2021-06-05 15:37:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:06,691 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13594 transitions. [2021-06-05 15:37:06,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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) [2021-06-05 15:37:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13594 transitions. [2021-06-05 15:37:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 15:37:06,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:06,694 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:06,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:06,895 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:06,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1117608869, now seen corresponding path program 89 times [2021-06-05 15:37:06,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:06,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522276292] [2021-06-05 15:37:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:07,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:07,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522276292] [2021-06-05 15:37:07,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522276292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:07,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576187647] [2021-06-05 15:37:07,027 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 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 [2021-06-05 15:37:07,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 15:37:07,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:37:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:07,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576187647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:07,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:07,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-06-05 15:37:07,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120518883] [2021-06-05 15:37:07,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:37:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:37:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:37:07,698 INFO L87 Difference]: Start difference. First operand 5623 states and 13594 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:16,458 INFO L93 Difference]: Finished difference Result 7450 states and 17196 transitions. [2021-06-05 15:37:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-06-05 15:37:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 15:37:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:16,465 INFO L225 Difference]: With dead ends: 7450 [2021-06-05 15:37:16,465 INFO L226 Difference]: Without dead ends: 7446 [2021-06-05 15:37:16,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46028 ImplicationChecksByTransitivity, 8229.7ms TimeCoverageRelationStatistics Valid=21517, Invalid=78023, Unknown=0, NotChecked=0, Total=99540 [2021-06-05 15:37:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2021-06-05 15:37:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 5623. [2021-06-05 15:37:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.4178228388473855) internal successors, (13593), 5622 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13593 transitions. [2021-06-05 15:37:16,522 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13593 transitions. Word has length 57 [2021-06-05 15:37:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:16,522 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13593 transitions. [2021-06-05 15:37:16,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13593 transitions. [2021-06-05 15:37:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:37:16,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:16,527 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:16,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:16,727 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:16,727 INFO L82 PathProgramCache]: Analyzing trace with hash -870344253, now seen corresponding path program 90 times [2021-06-05 15:37:16,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:16,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603879397] [2021-06-05 15:37:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:16,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:16,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603879397] [2021-06-05 15:37:16,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603879397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:16,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059657652] [2021-06-05 15:37:16,878 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 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 [2021-06-05 15:37:16,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 15:37:16,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:37:16,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:17,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059657652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:17,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:17,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-06-05 15:37:17,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90561275] [2021-06-05 15:37:17,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:37:17,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:37:17,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:37:17,185 INFO L87 Difference]: Start difference. First operand 5623 states and 13593 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:17,452 INFO L93 Difference]: Finished difference Result 7171 states and 17073 transitions. [2021-06-05 15:37:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:37:17,453 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:37:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:17,460 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 15:37:17,460 INFO L226 Difference]: Without dead ends: 7081 [2021-06-05 15:37:17,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:37:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-06-05 15:37:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6483. [2021-06-05 15:37:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 2.4438444924406046) internal successors, (15841), 6482 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 15841 transitions. [2021-06-05 15:37:17,536 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 15841 transitions. Word has length 59 [2021-06-05 15:37:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:17,536 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 15841 transitions. [2021-06-05 15:37:17,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 15841 transitions. [2021-06-05 15:37:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:37:17,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:17,540 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:17,741 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1705145369, now seen corresponding path program 91 times [2021-06-05 15:37:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775013091] [2021-06-05 15:37:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:17,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:17,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775013091] [2021-06-05 15:37:17,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775013091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:17,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766700352] [2021-06-05 15:37:17,974 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 15:37:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:18,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766700352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:18,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:18,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2021-06-05 15:37:18,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512626176] [2021-06-05 15:37:18,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:37:18,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:18,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:37:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:37:18,739 INFO L87 Difference]: Start difference. First operand 6483 states and 15841 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:25,091 INFO L93 Difference]: Finished difference Result 12343 states and 28098 transitions. [2021-06-05 15:37:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 15:37:25,091 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:37:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:25,103 INFO L225 Difference]: With dead ends: 12343 [2021-06-05 15:37:25,103 INFO L226 Difference]: Without dead ends: 12319 [2021-06-05 15:37:25,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10309 ImplicationChecksByTransitivity, 4127.4ms TimeCoverageRelationStatistics Valid=2449, Invalid=28351, Unknown=0, NotChecked=0, Total=30800 [2021-06-05 15:37:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2021-06-05 15:37:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 6755. [2021-06-05 15:37:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.447290494521765) internal successors, (16529), 6754 states have internal predecessors, (16529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 16529 transitions. [2021-06-05 15:37:25,192 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 16529 transitions. Word has length 59 [2021-06-05 15:37:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:25,192 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 16529 transitions. [2021-06-05 15:37:25,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 16529 transitions. [2021-06-05 15:37:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:37:25,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:25,196 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:25,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 15:37:25,397 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash 974779459, now seen corresponding path program 92 times [2021-06-05 15:37:25,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:25,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907292905] [2021-06-05 15:37:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:25,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:25,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907292905] [2021-06-05 15:37:25,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907292905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:25,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456419094] [2021-06-05 15:37:25,596 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 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 [2021-06-05 15:37:25,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:37:25,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 15:37:25,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:26,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456419094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:26,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:26,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-06-05 15:37:26,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750459024] [2021-06-05 15:37:26,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:37:26,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:26,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:37:26,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:37:26,408 INFO L87 Difference]: Start difference. First operand 6755 states and 16529 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 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) [2021-06-05 15:37:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:31,573 INFO L93 Difference]: Finished difference Result 9269 states and 21605 transitions. [2021-06-05 15:37:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 15:37:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 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) Word has length 59 [2021-06-05 15:37:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:31,581 INFO L225 Difference]: With dead ends: 9269 [2021-06-05 15:37:31,581 INFO L226 Difference]: Without dead ends: 9265 [2021-06-05 15:37:31,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 3461.4ms TimeCoverageRelationStatistics Valid=1733, Invalid=19147, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 15:37:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-06-05 15:37:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 6473. [2021-06-05 15:37:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6473 states, 6472 states have (on average 2.4456118665018542) internal successors, (15828), 6472 states have internal predecessors, (15828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6473 states to 6473 states and 15828 transitions. [2021-06-05 15:37:31,672 INFO L78 Accepts]: Start accepts. Automaton has 6473 states and 15828 transitions. Word has length 59 [2021-06-05 15:37:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:31,673 INFO L482 AbstractCegarLoop]: Abstraction has 6473 states and 15828 transitions. [2021-06-05 15:37:31,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 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) [2021-06-05 15:37:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 6473 states and 15828 transitions. [2021-06-05 15:37:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:37:31,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:31,677 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:31,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:31,877 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1018344093, now seen corresponding path program 93 times [2021-06-05 15:37:31,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:31,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306955076] [2021-06-05 15:37:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:32,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:32,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306955076] [2021-06-05 15:37:32,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306955076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:32,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556860619] [2021-06-05 15:37:32,096 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 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 [2021-06-05 15:37:32,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 15:37:32,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:37:32,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556860619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:32,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:32,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-06-05 15:37:32,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447916742] [2021-06-05 15:37:32,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 15:37:32,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 15:37:32,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:37:32,833 INFO L87 Difference]: Start difference. First operand 6473 states and 15828 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:41,326 INFO L93 Difference]: Finished difference Result 14464 states and 32612 transitions. [2021-06-05 15:37:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-05 15:37:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:37:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:41,340 INFO L225 Difference]: With dead ends: 14464 [2021-06-05 15:37:41,340 INFO L226 Difference]: Without dead ends: 14416 [2021-06-05 15:37:41,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17435 ImplicationChecksByTransitivity, 5175.7ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-06-05 15:37:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14416 states. [2021-06-05 15:37:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14416 to 6523. [2021-06-05 15:37:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.4449555351119288) internal successors, (15946), 6522 states have internal predecessors, (15946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 15946 transitions. [2021-06-05 15:37:41,438 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 15946 transitions. Word has length 59 [2021-06-05 15:37:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:41,438 INFO L482 AbstractCegarLoop]: Abstraction has 6523 states and 15946 transitions. [2021-06-05 15:37:41,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 15946 transitions. [2021-06-05 15:37:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:37:41,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:41,442 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:41,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:41,642 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash -194027999, now seen corresponding path program 94 times [2021-06-05 15:37:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:41,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043641218] [2021-06-05 15:37:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043641218] [2021-06-05 15:37:41,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043641218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874720402] [2021-06-05 15:37:41,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:41,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:37:41,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:37:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874720402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-06-05 15:37:42,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651041320] [2021-06-05 15:37:42,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:37:42,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:42,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:37:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:37:42,608 INFO L87 Difference]: Start difference. First operand 6523 states and 15946 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:50,986 INFO L93 Difference]: Finished difference Result 17210 states and 38597 transitions. [2021-06-05 15:37:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-06-05 15:37:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:37:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:51,002 INFO L225 Difference]: With dead ends: 17210 [2021-06-05 15:37:51,002 INFO L226 Difference]: Without dead ends: 17132 [2021-06-05 15:37:51,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22220 ImplicationChecksByTransitivity, 6070.8ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-06-05 15:37:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2021-06-05 15:37:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 6424. [2021-06-05 15:37:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 6423 states have (on average 2.4406040790907677) internal successors, (15676), 6423 states have internal predecessors, (15676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 15676 transitions. [2021-06-05 15:37:51,111 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 15676 transitions. Word has length 59 [2021-06-05 15:37:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:51,111 INFO L482 AbstractCegarLoop]: Abstraction has 6424 states and 15676 transitions. [2021-06-05 15:37:51,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:37:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 15676 transitions. [2021-06-05 15:37:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:37:51,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:51,116 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:37:51,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:51,316 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1178744485, now seen corresponding path program 95 times [2021-06-05 15:37:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:51,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694679046] [2021-06-05 15:37:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:51,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694679046] [2021-06-05 15:37:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694679046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817316183] [2021-06-05 15:37:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:51,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 15:37:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:37:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:52,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817316183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:52,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:52,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2021-06-05 15:37:52,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713936089] [2021-06-05 15:37:52,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 15:37:52,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 15:37:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:37:52,291 INFO L87 Difference]: Start difference. First operand 6424 states and 15676 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:00,333 INFO L93 Difference]: Finished difference Result 19569 states and 43599 transitions. [2021-06-05 15:38:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-06-05 15:38:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:38:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:00,353 INFO L225 Difference]: With dead ends: 19569 [2021-06-05 15:38:00,353 INFO L226 Difference]: Without dead ends: 19455 [2021-06-05 15:38:00,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22978 ImplicationChecksByTransitivity, 5826.0ms TimeCoverageRelationStatistics Valid=7134, Invalid=52646, Unknown=0, NotChecked=0, Total=59780 [2021-06-05 15:38:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19455 states. [2021-06-05 15:38:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19455 to 6298. [2021-06-05 15:38:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6298 states, 6297 states have (on average 2.4427505161187866) internal successors, (15382), 6297 states have internal predecessors, (15382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 15382 transitions. [2021-06-05 15:38:00,516 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 15382 transitions. Word has length 59 [2021-06-05 15:38:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:00,516 INFO L482 AbstractCegarLoop]: Abstraction has 6298 states and 15382 transitions. [2021-06-05 15:38:00,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 15382 transitions. [2021-06-05 15:38:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:38:00,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:00,519 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:00,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:00,719 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:00,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1738865705, now seen corresponding path program 96 times [2021-06-05 15:38:00,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:00,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338271784] [2021-06-05 15:38:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:00,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:00,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338271784] [2021-06-05 15:38:00,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338271784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:00,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461380540] [2021-06-05 15:38:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:00,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 15:38:00,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:00,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:38:00,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:01,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461380540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:01,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:01,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-06-05 15:38:01,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850383917] [2021-06-05 15:38:01,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:38:01,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:38:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:38:01,671 INFO L87 Difference]: Start difference. First operand 6298 states and 15382 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:07,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:07,856 INFO L93 Difference]: Finished difference Result 22986 states and 51049 transitions. [2021-06-05 15:38:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 15:38:07,857 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:38:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:07,880 INFO L225 Difference]: With dead ends: 22986 [2021-06-05 15:38:07,880 INFO L226 Difference]: Without dead ends: 22683 [2021-06-05 15:38:07,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 4785.1ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-06-05 15:38:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22683 states. [2021-06-05 15:38:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22683 to 5441. [2021-06-05 15:38:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 2.4193014705882354) internal successors, (13161), 5440 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 13161 transitions. [2021-06-05 15:38:08,014 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 13161 transitions. Word has length 59 [2021-06-05 15:38:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:08,014 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 13161 transitions. [2021-06-05 15:38:08,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 13161 transitions. [2021-06-05 15:38:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:38:08,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:08,017 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:08,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 15:38:08,218 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2044629331, now seen corresponding path program 97 times [2021-06-05 15:38:08,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:08,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671253904] [2021-06-05 15:38:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:08,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:08,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671253904] [2021-06-05 15:38:08,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671253904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:08,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251543372] [2021-06-05 15:38:08,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:38:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:09,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251543372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:09,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:09,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-06-05 15:38:09,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638664712] [2021-06-05 15:38:09,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:38:09,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:38:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:38:09,181 INFO L87 Difference]: Start difference. First operand 5441 states and 13161 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:14,270 INFO L93 Difference]: Finished difference Result 22758 states and 49665 transitions. [2021-06-05 15:38:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-05 15:38:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:38:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:14,293 INFO L225 Difference]: With dead ends: 22758 [2021-06-05 15:38:14,293 INFO L226 Difference]: Without dead ends: 22332 [2021-06-05 15:38:14,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14328 ImplicationChecksByTransitivity, 4106.8ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-06-05 15:38:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2021-06-05 15:38:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 5465. [2021-06-05 15:38:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5464 states have (on average 2.417459736456808) internal successors, (13209), 5464 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 13209 transitions. [2021-06-05 15:38:14,415 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 13209 transitions. Word has length 59 [2021-06-05 15:38:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:14,415 INFO L482 AbstractCegarLoop]: Abstraction has 5465 states and 13209 transitions. [2021-06-05 15:38:14,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 13209 transitions. [2021-06-05 15:38:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:38:14,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:14,418 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:14,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:14,619 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1129401905, now seen corresponding path program 98 times [2021-06-05 15:38:14,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:14,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479867501] [2021-06-05 15:38:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:14,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479867501] [2021-06-05 15:38:14,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479867501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584369141] [2021-06-05 15:38:14,902 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 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 [2021-06-05 15:38:14,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:38:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:14,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:38:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:15,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584369141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:15,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:15,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-06-05 15:38:15,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508890361] [2021-06-05 15:38:15,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 15:38:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:15,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 15:38:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:38:15,614 INFO L87 Difference]: Start difference. First operand 5465 states and 13209 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:21,146 INFO L93 Difference]: Finished difference Result 22040 states and 47868 transitions. [2021-06-05 15:38:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-06-05 15:38:21,146 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:38:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:21,166 INFO L225 Difference]: With dead ends: 22040 [2021-06-05 15:38:21,166 INFO L226 Difference]: Without dead ends: 21506 [2021-06-05 15:38:21,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19899 ImplicationChecksByTransitivity, 4803.0ms TimeCoverageRelationStatistics Valid=8757, Invalid=41195, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 15:38:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21506 states. [2021-06-05 15:38:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21506 to 5481. [2021-06-05 15:38:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.4162408759124085) internal successors, (13241), 5480 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 13241 transitions. [2021-06-05 15:38:21,284 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 13241 transitions. Word has length 59 [2021-06-05 15:38:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:21,284 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 13241 transitions. [2021-06-05 15:38:21,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 13241 transitions. [2021-06-05 15:38:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:38:21,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:21,287 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:21,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:21,488 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 819878581, now seen corresponding path program 99 times [2021-06-05 15:38:21,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:21,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110102420] [2021-06-05 15:38:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:21,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110102420] [2021-06-05 15:38:21,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110102420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54188489] [2021-06-05 15:38:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:21,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 15:38:21,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:38:21,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:22,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54188489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:22,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:22,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-06-05 15:38:22,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698353147] [2021-06-05 15:38:22,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:38:22,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:22,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:38:22,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:38:22,509 INFO L87 Difference]: Start difference. First operand 5481 states and 13241 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:28,550 INFO L93 Difference]: Finished difference Result 19025 states and 40337 transitions. [2021-06-05 15:38:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-06-05 15:38:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:38:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:28,570 INFO L225 Difference]: With dead ends: 19025 [2021-06-05 15:38:28,570 INFO L226 Difference]: Without dead ends: 18353 [2021-06-05 15:38:28,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23147 ImplicationChecksByTransitivity, 5264.8ms TimeCoverageRelationStatistics Valid=11132, Invalid=46228, Unknown=0, NotChecked=0, Total=57360 [2021-06-05 15:38:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-06-05 15:38:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5493. [2021-06-05 15:38:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.415331391114348) internal successors, (13265), 5492 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 13265 transitions. [2021-06-05 15:38:28,680 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 13265 transitions. Word has length 59 [2021-06-05 15:38:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:28,680 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 13265 transitions. [2021-06-05 15:38:28,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 13265 transitions. [2021-06-05 15:38:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:38:28,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:28,684 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:28,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 15:38:28,884 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1283609657, now seen corresponding path program 100 times [2021-06-05 15:38:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718085832] [2021-06-05 15:38:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718085832] [2021-06-05 15:38:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718085832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214675661] [2021-06-05 15:38:29,239 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 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 [2021-06-05 15:38:29,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:38:29,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:38:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:29,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214675661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:29,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:29,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-05 15:38:29,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013571512] [2021-06-05 15:38:29,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:38:29,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:38:29,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:38:29,932 INFO L87 Difference]: Start difference. First operand 5493 states and 13265 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:35,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:35,499 INFO L93 Difference]: Finished difference Result 17796 states and 38889 transitions. [2021-06-05 15:38:35,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-05 15:38:35,499 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:38:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:35,514 INFO L225 Difference]: With dead ends: 17796 [2021-06-05 15:38:35,514 INFO L226 Difference]: Without dead ends: 16833 [2021-06-05 15:38:35,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18178 ImplicationChecksByTransitivity, 5068.8ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-06-05 15:38:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-06-05 15:38:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 5659. [2021-06-05 15:38:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.376458112407211) internal successors, (13446), 5658 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 13446 transitions. [2021-06-05 15:38:35,613 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 13446 transitions. Word has length 59 [2021-06-05 15:38:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:35,613 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 13446 transitions. [2021-06-05 15:38:35,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 13446 transitions. [2021-06-05 15:38:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:38:35,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:35,616 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:35,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 15:38:35,817 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash -994946229, now seen corresponding path program 101 times [2021-06-05 15:38:35,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:35,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685464645] [2021-06-05 15:38:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:36,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:36,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685464645] [2021-06-05 15:38:36,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685464645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:36,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162132044] [2021-06-05 15:38:36,012 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 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 [2021-06-05 15:38:36,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 15:38:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:38:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:36,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162132044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:36,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:36,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-06-05 15:38:36,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42699813] [2021-06-05 15:38:36,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:38:36,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:36,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:38:36,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:38:36,713 INFO L87 Difference]: Start difference. First operand 5659 states and 13446 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 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) [2021-06-05 15:38:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:45,930 INFO L93 Difference]: Finished difference Result 12575 states and 27866 transitions. [2021-06-05 15:38:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-06-05 15:38:45,930 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 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) Word has length 59 [2021-06-05 15:38:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:45,941 INFO L225 Difference]: With dead ends: 12575 [2021-06-05 15:38:45,941 INFO L226 Difference]: Without dead ends: 12571 [2021-06-05 15:38:45,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 8531.3ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-06-05 15:38:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12571 states. [2021-06-05 15:38:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12571 to 5767. [2021-06-05 15:38:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 2.392126257370794) internal successors, (13793), 5766 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 13793 transitions. [2021-06-05 15:38:46,022 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 13793 transitions. Word has length 59 [2021-06-05 15:38:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:46,022 INFO L482 AbstractCegarLoop]: Abstraction has 5767 states and 13793 transitions. [2021-06-05 15:38:46,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 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) [2021-06-05 15:38:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 13793 transitions. [2021-06-05 15:38:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 15:38:46,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:46,025 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:46,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:46,229 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash -192628671, now seen corresponding path program 102 times [2021-06-05 15:38:46,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:46,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189320522] [2021-06-05 15:38:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:46,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:46,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189320522] [2021-06-05 15:38:46,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189320522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:46,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58278911] [2021-06-05 15:38:46,522 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 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 [2021-06-05 15:38:46,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 15:38:46,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:38:46,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:47,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58278911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:47,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:47,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-06-05 15:38:47,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046439496] [2021-06-05 15:38:47,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-06-05 15:38:47,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-06-05 15:38:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:38:47,365 INFO L87 Difference]: Start difference. First operand 5767 states and 13793 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 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) [2021-06-05 15:38:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:53,846 INFO L93 Difference]: Finished difference Result 8440 states and 18980 transitions. [2021-06-05 15:38:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 15:38:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 15:38:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:53,852 INFO L225 Difference]: With dead ends: 8440 [2021-06-05 15:38:53,852 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 15:38:53,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24730 ImplicationChecksByTransitivity, 5909.0ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-06-05 15:38:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 15:38:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5762. [2021-06-05 15:38:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.389168547127235) internal successors, (13764), 5761 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13764 transitions. [2021-06-05 15:38:53,903 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13764 transitions. Word has length 61 [2021-06-05 15:38:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:53,903 INFO L482 AbstractCegarLoop]: Abstraction has 5762 states and 13764 transitions. [2021-06-05 15:38:53,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 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) [2021-06-05 15:38:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13764 transitions. [2021-06-05 15:38:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 15:38:53,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:53,907 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:38:54,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:54,107 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:54,107 INFO L82 PathProgramCache]: Analyzing trace with hash 559420251, now seen corresponding path program 103 times [2021-06-05 15:38:54,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:54,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581871730] [2021-06-05 15:38:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:54,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:54,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581871730] [2021-06-05 15:38:54,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581871730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:54,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785716513] [2021-06-05 15:38:54,249 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 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 [2021-06-05 15:38:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:38:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:54,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785716513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:54,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:54,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28] total 42 [2021-06-05 15:38:54,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580174375] [2021-06-05 15:38:54,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:38:54,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:38:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:38:54,928 INFO L87 Difference]: Start difference. First operand 5762 states and 13764 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:00,785 INFO L93 Difference]: Finished difference Result 7544 states and 17272 transitions. [2021-06-05 15:39:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 15:39:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 15:39:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:00,792 INFO L225 Difference]: With dead ends: 7544 [2021-06-05 15:39:00,792 INFO L226 Difference]: Without dead ends: 7540 [2021-06-05 15:39:00,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23464 ImplicationChecksByTransitivity, 5575.2ms TimeCoverageRelationStatistics Valid=12941, Invalid=42519, Unknown=0, NotChecked=0, Total=55460 [2021-06-05 15:39:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2021-06-05 15:39:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 5718. [2021-06-05 15:39:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.391988805317474) internal successors, (13675), 5717 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 13675 transitions. [2021-06-05 15:39:00,845 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 13675 transitions. Word has length 61 [2021-06-05 15:39:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:00,845 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 13675 transitions. [2021-06-05 15:39:00,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 13675 transitions. [2021-06-05 15:39:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 15:39:00,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:00,849 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:01,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 15:39:01,049 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:01,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1867745943, now seen corresponding path program 104 times [2021-06-05 15:39:01,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:01,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770229892] [2021-06-05 15:39:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:39:01,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:01,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770229892] [2021-06-05 15:39:01,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770229892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:01,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560281656] [2021-06-05 15:39:01,225 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 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 [2021-06-05 15:39:01,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:39:01,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 15:39:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:01,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560281656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:01,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:01,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-06-05 15:39:01,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637241756] [2021-06-05 15:39:01,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:39:01,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:01,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:39:01,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:39:01,902 INFO L87 Difference]: Start difference. First operand 5718 states and 13675 transitions. Second operand has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 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) [2021-06-05 15:39:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:05,126 INFO L93 Difference]: Finished difference Result 12090 states and 27556 transitions. [2021-06-05 15:39:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 15:39:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 15:39:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:05,138 INFO L225 Difference]: With dead ends: 12090 [2021-06-05 15:39:05,138 INFO L226 Difference]: Without dead ends: 12081 [2021-06-05 15:39:05,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5212 ImplicationChecksByTransitivity, 2627.1ms TimeCoverageRelationStatistics Valid=2862, Invalid=14694, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 15:39:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-06-05 15:39:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 7235. [2021-06-05 15:39:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 2.380702239424938) internal successors, (17222), 7234 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 17222 transitions. [2021-06-05 15:39:05,227 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 17222 transitions. Word has length 61 [2021-06-05 15:39:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:05,227 INFO L482 AbstractCegarLoop]: Abstraction has 7235 states and 17222 transitions. [2021-06-05 15:39:05,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 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) [2021-06-05 15:39:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 17222 transitions. [2021-06-05 15:39:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:39:05,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:05,232 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:05,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 15:39:05,433 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:05,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1355244929, now seen corresponding path program 105 times [2021-06-05 15:39:05,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:05,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761763488] [2021-06-05 15:39:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:05,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761763488] [2021-06-05 15:39:05,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761763488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309566803] [2021-06-05 15:39:05,601 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 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 [2021-06-05 15:39:05,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 15:39:05,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:05,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:39:05,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 25 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309566803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:05,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:05,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 23 [2021-06-05 15:39:05,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444824492] [2021-06-05 15:39:05,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:39:05,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:39:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:39:05,850 INFO L87 Difference]: Start difference. First operand 7235 states and 17222 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:06,194 INFO L93 Difference]: Finished difference Result 9195 states and 21714 transitions. [2021-06-05 15:39:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:39:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:39:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:06,204 INFO L225 Difference]: With dead ends: 9195 [2021-06-05 15:39:06,204 INFO L226 Difference]: Without dead ends: 9102 [2021-06-05 15:39:06,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:39:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9102 states. [2021-06-05 15:39:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9102 to 8338. [2021-06-05 15:39:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 2.408900083963056) internal successors, (20083), 8337 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 20083 transitions. [2021-06-05 15:39:06,303 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 20083 transitions. Word has length 63 [2021-06-05 15:39:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:06,303 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 20083 transitions. [2021-06-05 15:39:06,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 20083 transitions. [2021-06-05 15:39:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:39:06,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:06,347 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:06,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:06,548 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2045530241, now seen corresponding path program 106 times [2021-06-05 15:39:06,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:06,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942694464] [2021-06-05 15:39:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:06,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:06,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942694464] [2021-06-05 15:39:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942694464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:06,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308236388] [2021-06-05 15:39:06,785 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 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 [2021-06-05 15:39:06,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:39:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-05 15:39:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:07,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308236388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:07,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:07,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30] total 47 [2021-06-05 15:39:07,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697197095] [2021-06-05 15:39:07,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:39:07,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:39:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:39:07,662 INFO L87 Difference]: Start difference. First operand 8338 states and 20083 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 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) [2021-06-05 15:39:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:14,876 INFO L93 Difference]: Finished difference Result 11486 states and 26531 transitions. [2021-06-05 15:39:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 15:39:14,877 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:39:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:14,888 INFO L225 Difference]: With dead ends: 11486 [2021-06-05 15:39:14,888 INFO L226 Difference]: Without dead ends: 11482 [2021-06-05 15:39:14,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8732 ImplicationChecksByTransitivity, 4234.8ms TimeCoverageRelationStatistics Valid=2129, Invalid=25593, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 15:39:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-06-05 15:39:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 8616. [2021-06-05 15:39:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8615 states have (on average 2.4174114915844456) internal successors, (20826), 8615 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 20826 transitions. [2021-06-05 15:39:14,990 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 20826 transitions. Word has length 63 [2021-06-05 15:39:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:14,990 INFO L482 AbstractCegarLoop]: Abstraction has 8616 states and 20826 transitions. [2021-06-05 15:39:14,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 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) [2021-06-05 15:39:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 20826 transitions. [2021-06-05 15:39:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:39:14,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:14,997 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:15,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:15,198 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2113535449, now seen corresponding path program 107 times [2021-06-05 15:39:15,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:15,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943565410] [2021-06-05 15:39:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:15,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943565410] [2021-06-05 15:39:15,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943565410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230855772] [2021-06-05 15:39:15,444 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 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 [2021-06-05 15:39:15,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 15:39:15,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 15:39:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:16,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230855772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:16,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:16,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 50 [2021-06-05 15:39:16,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609042315] [2021-06-05 15:39:16,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:39:16,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:16,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:39:16,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:39:16,290 INFO L87 Difference]: Start difference. First operand 8616 states and 20826 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:26,336 INFO L93 Difference]: Finished difference Result 18453 states and 41420 transitions. [2021-06-05 15:39:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-06-05 15:39:26,336 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:39:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:26,355 INFO L225 Difference]: With dead ends: 18453 [2021-06-05 15:39:26,355 INFO L226 Difference]: Without dead ends: 18405 [2021-06-05 15:39:26,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22263 ImplicationChecksByTransitivity, 6275.5ms TimeCoverageRelationStatistics Valid=5109, Invalid=55161, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 15:39:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-06-05 15:39:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 8296. [2021-06-05 15:39:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8296 states, 8295 states have (on average 2.4176009644364074) internal successors, (20054), 8295 states have internal predecessors, (20054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8296 states to 8296 states and 20054 transitions. [2021-06-05 15:39:26,488 INFO L78 Accepts]: Start accepts. Automaton has 8296 states and 20054 transitions. Word has length 63 [2021-06-05 15:39:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:26,488 INFO L482 AbstractCegarLoop]: Abstraction has 8296 states and 20054 transitions. [2021-06-05 15:39:26,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 8296 states and 20054 transitions. [2021-06-05 15:39:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:39:26,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:26,494 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:26,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 15:39:26,695 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 232798557, now seen corresponding path program 108 times [2021-06-05 15:39:26,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:26,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80596491] [2021-06-05 15:39:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:26,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:26,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80596491] [2021-06-05 15:39:26,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80596491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:26,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439199122] [2021-06-05 15:39:26,987 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:27,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 15:39:27,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:39:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:27,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439199122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:27,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:27,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2021-06-05 15:39:27,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263602390] [2021-06-05 15:39:27,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:39:27,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:27,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:39:27,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2297, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:39:27,830 INFO L87 Difference]: Start difference. First operand 8296 states and 20054 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:38,108 INFO L93 Difference]: Finished difference Result 20814 states and 46375 transitions. [2021-06-05 15:39:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 15:39:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:39:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:38,128 INFO L225 Difference]: With dead ends: 20814 [2021-06-05 15:39:38,129 INFO L226 Difference]: Without dead ends: 20736 [2021-06-05 15:39:38,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28610 ImplicationChecksByTransitivity, 7192.9ms TimeCoverageRelationStatistics Valid=6992, Invalid=68358, Unknown=0, NotChecked=0, Total=75350 [2021-06-05 15:39:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20736 states. [2021-06-05 15:39:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20736 to 8280. [2021-06-05 15:39:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 2.4179248701534) internal successors, (20018), 8279 states have internal predecessors, (20018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 20018 transitions. [2021-06-05 15:39:38,305 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 20018 transitions. Word has length 63 [2021-06-05 15:39:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:38,305 INFO L482 AbstractCegarLoop]: Abstraction has 8280 states and 20018 transitions. [2021-06-05 15:39:38,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 20018 transitions. [2021-06-05 15:39:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:39:38,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:38,311 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:38,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:38,511 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash -742874655, now seen corresponding path program 109 times [2021-06-05 15:39:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:38,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318025476] [2021-06-05 15:39:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:38,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:38,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318025476] [2021-06-05 15:39:38,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318025476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:38,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133181169] [2021-06-05 15:39:38,765 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 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 [2021-06-05 15:39:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:38,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 15:39:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:39,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133181169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:39,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:39,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-06-05 15:39:39,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806585093] [2021-06-05 15:39:39,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 15:39:39,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 15:39:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:39:39,569 INFO L87 Difference]: Start difference. First operand 8280 states and 20018 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:49,313 INFO L93 Difference]: Finished difference Result 23395 states and 51906 transitions. [2021-06-05 15:39:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-06-05 15:39:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:39:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:49,335 INFO L225 Difference]: With dead ends: 23395 [2021-06-05 15:39:49,335 INFO L226 Difference]: Without dead ends: 23281 [2021-06-05 15:39:49,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31036 ImplicationChecksByTransitivity, 7206.1ms TimeCoverageRelationStatistics Valid=8486, Invalid=71886, Unknown=0, NotChecked=0, Total=80372 [2021-06-05 15:39:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23281 states. [2021-06-05 15:39:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23281 to 8204. [2021-06-05 15:39:49,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 2.4183835182250397) internal successors, (19838), 8203 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 19838 transitions. [2021-06-05 15:39:49,542 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 19838 transitions. Word has length 63 [2021-06-05 15:39:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:49,542 INFO L482 AbstractCegarLoop]: Abstraction has 8204 states and 19838 transitions. [2021-06-05 15:39:49,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 19838 transitions. [2021-06-05 15:39:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:39:49,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:49,548 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:39:49,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 15:39:49,748 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2113730405, now seen corresponding path program 110 times [2021-06-05 15:39:49,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:49,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206670724] [2021-06-05 15:39:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:50,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:50,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206670724] [2021-06-05 15:39:50,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206670724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:50,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709721716] [2021-06-05 15:39:50,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:39:50,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:39:50,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:39:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:50,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709721716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:50,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:50,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 52 [2021-06-05 15:39:50,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287966971] [2021-06-05 15:39:50,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 15:39:50,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:50,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 15:39:50,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:39:50,845 INFO L87 Difference]: Start difference. First operand 8204 states and 19838 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:59,835 INFO L93 Difference]: Finished difference Result 26465 states and 58445 transitions. [2021-06-05 15:39:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-06-05 15:39:59,836 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:39:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:59,862 INFO L225 Difference]: With dead ends: 26465 [2021-06-05 15:39:59,863 INFO L226 Difference]: Without dead ends: 26309 [2021-06-05 15:39:59,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26772 ImplicationChecksByTransitivity, 6163.1ms TimeCoverageRelationStatistics Valid=8589, Invalid=60843, Unknown=0, NotChecked=0, Total=69432 [2021-06-05 15:39:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2021-06-05 15:40:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 8152. [2021-06-05 15:40:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.4210526315789473) internal successors, (19734), 8151 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 19734 transitions. [2021-06-05 15:40:00,020 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 19734 transitions. Word has length 63 [2021-06-05 15:40:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:00,020 INFO L482 AbstractCegarLoop]: Abstraction has 8152 states and 19734 transitions. [2021-06-05 15:40:00,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 19734 transitions. [2021-06-05 15:40:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:40:00,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:00,026 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:00,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:00,229 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:00,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:00,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1932982761, now seen corresponding path program 111 times [2021-06-05 15:40:00,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:00,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487792075] [2021-06-05 15:40:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:00,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:00,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487792075] [2021-06-05 15:40:00,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487792075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:00,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617107576] [2021-06-05 15:40:00,487 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 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 [2021-06-05 15:40:00,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 15:40:00,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:40:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:01,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617107576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:01,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:01,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 53 [2021-06-05 15:40:01,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462691596] [2021-06-05 15:40:01,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:40:01,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:40:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:40:01,298 INFO L87 Difference]: Start difference. First operand 8152 states and 19734 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:07,305 INFO L93 Difference]: Finished difference Result 29047 states and 63963 transitions. [2021-06-05 15:40:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-05 15:40:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:40:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:07,339 INFO L225 Difference]: With dead ends: 29047 [2021-06-05 15:40:07,339 INFO L226 Difference]: Without dead ends: 28687 [2021-06-05 15:40:07,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16150 ImplicationChecksByTransitivity, 4712.0ms TimeCoverageRelationStatistics Valid=6194, Invalid=36862, Unknown=0, NotChecked=0, Total=43056 [2021-06-05 15:40:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-06-05 15:40:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 8192. [2021-06-05 15:40:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8191 states have (on average 2.418996459528751) internal successors, (19814), 8191 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:07,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 19814 transitions. [2021-06-05 15:40:07,517 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 19814 transitions. Word has length 63 [2021-06-05 15:40:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:07,517 INFO L482 AbstractCegarLoop]: Abstraction has 8192 states and 19814 transitions. [2021-06-05 15:40:07,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 19814 transitions. [2021-06-05 15:40:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:40:07,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:07,523 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:07,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-05 15:40:07,724 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:07,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1308649837, now seen corresponding path program 112 times [2021-06-05 15:40:07,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:07,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113306402] [2021-06-05 15:40:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:07,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:07,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113306402] [2021-06-05 15:40:07,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113306402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:07,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550659429] [2021-06-05 15:40:07,991 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 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 [2021-06-05 15:40:08,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:40:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:08,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:40:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550659429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:08,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:08,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2021-06-05 15:40:08,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120759278] [2021-06-05 15:40:08,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 15:40:08,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 15:40:08,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:40:08,815 INFO L87 Difference]: Start difference. First operand 8192 states and 19814 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:14,799 INFO L93 Difference]: Finished difference Result 29747 states and 65287 transitions. [2021-06-05 15:40:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-05 15:40:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:40:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:14,832 INFO L225 Difference]: With dead ends: 29747 [2021-06-05 15:40:14,832 INFO L226 Difference]: Without dead ends: 29174 [2021-06-05 15:40:14,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19920 ImplicationChecksByTransitivity, 5097.9ms TimeCoverageRelationStatistics Valid=8171, Invalid=43585, Unknown=0, NotChecked=0, Total=51756 [2021-06-05 15:40:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29174 states. [2021-06-05 15:40:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29174 to 8224. [2021-06-05 15:40:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8224 states, 8223 states have (on average 2.417365924844947) internal successors, (19878), 8223 states have internal predecessors, (19878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 19878 transitions. [2021-06-05 15:40:15,020 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 19878 transitions. Word has length 63 [2021-06-05 15:40:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:15,020 INFO L482 AbstractCegarLoop]: Abstraction has 8224 states and 19878 transitions. [2021-06-05 15:40:15,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 19878 transitions. [2021-06-05 15:40:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:40:15,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:15,026 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:15,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 15:40:15,228 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1493370353, now seen corresponding path program 113 times [2021-06-05 15:40:15,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:15,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435677227] [2021-06-05 15:40:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:15,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:15,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435677227] [2021-06-05 15:40:15,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435677227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:15,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372742897] [2021-06-05 15:40:15,553 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 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 [2021-06-05 15:40:15,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 15:40:15,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:15,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:40:15,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:16,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372742897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:16,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:16,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2021-06-05 15:40:16,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261728563] [2021-06-05 15:40:16,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 15:40:16,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 15:40:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:40:16,329 INFO L87 Difference]: Start difference. First operand 8224 states and 19878 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:23,607 INFO L93 Difference]: Finished difference Result 28419 states and 62099 transitions. [2021-06-05 15:40:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-06-05 15:40:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:40:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:23,638 INFO L225 Difference]: With dead ends: 28419 [2021-06-05 15:40:23,638 INFO L226 Difference]: Without dead ends: 27744 [2021-06-05 15:40:23,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26898 ImplicationChecksByTransitivity, 5898.3ms TimeCoverageRelationStatistics Valid=11861, Invalid=54445, Unknown=0, NotChecked=0, Total=66306 [2021-06-05 15:40:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2021-06-05 15:40:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 8248. [2021-06-05 15:40:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8248 states, 8247 states have (on average 2.4161513277555473) internal successors, (19926), 8247 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8248 states to 8248 states and 19926 transitions. [2021-06-05 15:40:23,839 INFO L78 Accepts]: Start accepts. Automaton has 8248 states and 19926 transitions. Word has length 63 [2021-06-05 15:40:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:23,839 INFO L482 AbstractCegarLoop]: Abstraction has 8248 states and 19926 transitions. [2021-06-05 15:40:23,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 8248 states and 19926 transitions. [2021-06-05 15:40:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:40:23,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:23,846 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:24,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:24,046 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 184061813, now seen corresponding path program 114 times [2021-06-05 15:40:24,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:24,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232344342] [2021-06-05 15:40:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:24,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:24,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232344342] [2021-06-05 15:40:24,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232344342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:24,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177788329] [2021-06-05 15:40:24,350 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 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 [2021-06-05 15:40:24,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 15:40:24,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:40:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:25,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177788329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:25,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:25,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-06-05 15:40:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250657424] [2021-06-05 15:40:25,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 15:40:25,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 15:40:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:40:25,133 INFO L87 Difference]: Start difference. First operand 8248 states and 19926 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:31,799 INFO L93 Difference]: Finished difference Result 27835 states and 60645 transitions. [2021-06-05 15:40:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 15:40:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:40:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:31,826 INFO L225 Difference]: With dead ends: 27835 [2021-06-05 15:40:31,826 INFO L226 Difference]: Without dead ends: 26926 [2021-06-05 15:40:31,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 5778.9ms TimeCoverageRelationStatistics Valid=12784, Invalid=52496, Unknown=0, NotChecked=0, Total=65280 [2021-06-05 15:40:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-06-05 15:40:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 8264. [2021-06-05 15:40:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8264 states, 8263 states have (on average 2.4153455161563597) internal successors, (19958), 8263 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8264 states to 8264 states and 19958 transitions. [2021-06-05 15:40:31,983 INFO L78 Accepts]: Start accepts. Automaton has 8264 states and 19958 transitions. Word has length 63 [2021-06-05 15:40:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:31,983 INFO L482 AbstractCegarLoop]: Abstraction has 8264 states and 19958 transitions. [2021-06-05 15:40:31,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 8264 states and 19958 transitions. [2021-06-05 15:40:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:40:31,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:31,989 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:32,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:32,189 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:32,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2102737415, now seen corresponding path program 115 times [2021-06-05 15:40:32,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:32,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057422820] [2021-06-05 15:40:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:32,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:32,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057422820] [2021-06-05 15:40:32,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057422820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:32,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724626091] [2021-06-05 15:40:32,541 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 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 [2021-06-05 15:40:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:32,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:40:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:33,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724626091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:33,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:33,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-06-05 15:40:33,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819354091] [2021-06-05 15:40:33,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-06-05 15:40:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-06-05 15:40:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:40:33,438 INFO L87 Difference]: Start difference. First operand 8264 states and 19958 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:41,407 INFO L93 Difference]: Finished difference Result 25077 states and 55934 transitions. [2021-06-05 15:40:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-06-05 15:40:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:40:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:41,427 INFO L225 Difference]: With dead ends: 25077 [2021-06-05 15:40:41,427 INFO L226 Difference]: Without dead ends: 24000 [2021-06-05 15:40:41,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29595 ImplicationChecksByTransitivity, 7071.2ms TimeCoverageRelationStatistics Valid=15969, Invalid=59931, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 15:40:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24000 states. [2021-06-05 15:40:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24000 to 8860. [2021-06-05 15:40:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.3754374082853595) internal successors, (21044), 8859 states have internal predecessors, (21044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 21044 transitions. [2021-06-05 15:40:41,575 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 21044 transitions. Word has length 63 [2021-06-05 15:40:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:41,575 INFO L482 AbstractCegarLoop]: Abstraction has 8860 states and 21044 transitions. [2021-06-05 15:40:41,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 21044 transitions. [2021-06-05 15:40:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:40:41,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:41,582 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:41,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 15:40:41,782 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:41,782 INFO L82 PathProgramCache]: Analyzing trace with hash 248636239, now seen corresponding path program 116 times [2021-06-05 15:40:41,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:41,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815687291] [2021-06-05 15:40:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:41,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:41,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815687291] [2021-06-05 15:40:41,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815687291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:41,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119043128] [2021-06-05 15:40:41,958 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 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 [2021-06-05 15:40:41,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:40:41,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:40:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:42,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119043128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:42,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:42,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 46 [2021-06-05 15:40:42,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609532865] [2021-06-05 15:40:42,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 15:40:42,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:42,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 15:40:42,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:40:42,717 INFO L87 Difference]: Start difference. First operand 8860 states and 21044 transitions. Second operand has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 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) [2021-06-05 15:40:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:54,403 INFO L93 Difference]: Finished difference Result 18047 states and 40389 transitions. [2021-06-05 15:40:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-06-05 15:40:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:40:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:54,418 INFO L225 Difference]: With dead ends: 18047 [2021-06-05 15:40:54,419 INFO L226 Difference]: Without dead ends: 18043 [2021-06-05 15:40:54,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65131 ImplicationChecksByTransitivity, 10567.7ms TimeCoverageRelationStatistics Valid=28937, Invalid=109075, Unknown=0, NotChecked=0, Total=138012 [2021-06-05 15:40:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18043 states. [2021-06-05 15:40:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18043 to 9034. [2021-06-05 15:40:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9034 states, 9033 states have (on average 2.3871360566810584) internal successors, (21563), 9033 states have internal predecessors, (21563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:40:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9034 states to 9034 states and 21563 transitions. [2021-06-05 15:40:54,538 INFO L78 Accepts]: Start accepts. Automaton has 9034 states and 21563 transitions. Word has length 63 [2021-06-05 15:40:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:54,539 INFO L482 AbstractCegarLoop]: Abstraction has 9034 states and 21563 transitions. [2021-06-05 15:40:54,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 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) [2021-06-05 15:40:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9034 states and 21563 transitions. [2021-06-05 15:40:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 15:40:54,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:54,545 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:40:54,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:54,746 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash -892450307, now seen corresponding path program 117 times [2021-06-05 15:40:54,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:54,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824157325] [2021-06-05 15:40:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:55,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:55,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824157325] [2021-06-05 15:40:55,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824157325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:55,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821544768] [2021-06-05 15:40:55,082 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 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 [2021-06-05 15:40:55,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 15:40:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 15:40:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:56,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821544768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:56,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:56,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-06-05 15:40:56,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600893652] [2021-06-05 15:40:56,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 15:40:56,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 15:40:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:40:56,107 INFO L87 Difference]: Start difference. First operand 9034 states and 21563 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:04,055 INFO L93 Difference]: Finished difference Result 12913 states and 29503 transitions. [2021-06-05 15:41:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-06-05 15:41:04,055 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 15:41:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:04,066 INFO L225 Difference]: With dead ends: 12913 [2021-06-05 15:41:04,067 INFO L226 Difference]: Without dead ends: 12355 [2021-06-05 15:41:04,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32726 ImplicationChecksByTransitivity, 7271.3ms TimeCoverageRelationStatistics Valid=21240, Invalid=58002, Unknown=0, NotChecked=0, Total=79242 [2021-06-05 15:41:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2021-06-05 15:41:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 8889. [2021-06-05 15:41:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8889 states, 8888 states have (on average 2.3834383438343836) internal successors, (21184), 8888 states have internal predecessors, (21184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 21184 transitions. [2021-06-05 15:41:04,168 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 21184 transitions. Word has length 65 [2021-06-05 15:41:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:04,168 INFO L482 AbstractCegarLoop]: Abstraction has 8889 states and 21184 transitions. [2021-06-05 15:41:04,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 21184 transitions. [2021-06-05 15:41:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 15:41:04,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:04,174 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:04,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:04,375 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1356747611, now seen corresponding path program 118 times [2021-06-05 15:41:04,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:04,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513154969] [2021-06-05 15:41:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:04,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:04,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513154969] [2021-06-05 15:41:04,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513154969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:04,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488320531] [2021-06-05 15:41:04,540 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 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 [2021-06-05 15:41:04,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:04,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:41:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:05,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488320531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:05,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:05,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 45 [2021-06-05 15:41:05,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193161340] [2021-06-05 15:41:05,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:41:05,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:41:05,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:05,335 INFO L87 Difference]: Start difference. First operand 8889 states and 21184 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:12,508 INFO L93 Difference]: Finished difference Result 10949 states and 25244 transitions. [2021-06-05 15:41:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-06-05 15:41:12,508 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 15:41:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:12,516 INFO L225 Difference]: With dead ends: 10949 [2021-06-05 15:41:12,516 INFO L226 Difference]: Without dead ends: 10945 [2021-06-05 15:41:12,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31134 ImplicationChecksByTransitivity, 6678.6ms TimeCoverageRelationStatistics Valid=16708, Invalid=54848, Unknown=0, NotChecked=0, Total=71556 [2021-06-05 15:41:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10945 states. [2021-06-05 15:41:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10945 to 8841. [2021-06-05 15:41:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3854072398190045) internal successors, (21087), 8840 states have internal predecessors, (21087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 21087 transitions. [2021-06-05 15:41:12,601 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 21087 transitions. Word has length 65 [2021-06-05 15:41:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:12,601 INFO L482 AbstractCegarLoop]: Abstraction has 8841 states and 21087 transitions. [2021-06-05 15:41:12,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 21087 transitions. [2021-06-05 15:41:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:41:12,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:12,608 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:12,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-05 15:41:12,817 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash 426028347, now seen corresponding path program 119 times [2021-06-05 15:41:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:12,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302302418] [2021-06-05 15:41:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:13,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:13,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302302418] [2021-06-05 15:41:13,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302302418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:13,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150725436] [2021-06-05 15:41:13,014 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 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 [2021-06-05 15:41:13,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 15:41:13,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:41:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:13,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150725436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:13,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:13,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 15:41:13,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939072909] [2021-06-05 15:41:13,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:41:13,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:13,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:41:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:13,157 INFO L87 Difference]: Start difference. First operand 8841 states and 21087 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:13,403 INFO L93 Difference]: Finished difference Result 10902 states and 25809 transitions. [2021-06-05 15:41:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:41:13,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:41:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:13,415 INFO L225 Difference]: With dead ends: 10902 [2021-06-05 15:41:13,415 INFO L226 Difference]: Without dead ends: 10809 [2021-06-05 15:41:13,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2021-06-05 15:41:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10150. [2021-06-05 15:41:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 2.4184648733865406) internal successors, (24545), 10149 states have internal predecessors, (24545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 24545 transitions. [2021-06-05 15:41:13,521 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 24545 transitions. Word has length 67 [2021-06-05 15:41:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:13,521 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 24545 transitions. [2021-06-05 15:41:13,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 24545 transitions. [2021-06-05 15:41:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:41:13,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:13,528 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:13,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:13,728 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash -815506287, now seen corresponding path program 120 times [2021-06-05 15:41:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:13,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820142796] [2021-06-05 15:41:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:13,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:13,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820142796] [2021-06-05 15:41:13,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820142796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:13,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914958880] [2021-06-05 15:41:13,991 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 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 [2021-06-05 15:41:14,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 15:41:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 15:41:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914958880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:14,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:14,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2021-06-05 15:41:14,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556632801] [2021-06-05 15:41:14,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 15:41:14,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 15:41:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:41:14,995 INFO L87 Difference]: Start difference. First operand 10150 states and 24545 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:24,335 INFO L93 Difference]: Finished difference Result 19443 states and 44030 transitions. [2021-06-05 15:41:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-05 15:41:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:41:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:24,353 INFO L225 Difference]: With dead ends: 19443 [2021-06-05 15:41:24,353 INFO L226 Difference]: Without dead ends: 19410 [2021-06-05 15:41:24,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14672 ImplicationChecksByTransitivity, 5403.9ms TimeCoverageRelationStatistics Valid=2943, Invalid=40113, Unknown=0, NotChecked=0, Total=43056 [2021-06-05 15:41:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19410 states. [2021-06-05 15:41:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19410 to 10699. [2021-06-05 15:41:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 10698 states have (on average 2.419798093101514) internal successors, (25887), 10698 states have internal predecessors, (25887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 25887 transitions. [2021-06-05 15:41:24,497 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 25887 transitions. Word has length 67 [2021-06-05 15:41:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:24,497 INFO L482 AbstractCegarLoop]: Abstraction has 10699 states and 25887 transitions. [2021-06-05 15:41:24,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 25887 transitions. [2021-06-05 15:41:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:41:24,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:24,504 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:24,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:24,705 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1545872197, now seen corresponding path program 121 times [2021-06-05 15:41:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:24,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159129023] [2021-06-05 15:41:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:24,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:24,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159129023] [2021-06-05 15:41:24,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159129023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:24,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755588693] [2021-06-05 15:41:24,948 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 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 [2021-06-05 15:41:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 15:41:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:25,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755588693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:25,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:25,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32] total 50 [2021-06-05 15:41:25,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768720717] [2021-06-05 15:41:25,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:41:25,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:41:25,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:41:25,982 INFO L87 Difference]: Start difference. First operand 10699 states and 25887 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:33,131 INFO L93 Difference]: Finished difference Result 13973 states and 32494 transitions. [2021-06-05 15:41:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 15:41:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:41:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:33,142 INFO L225 Difference]: With dead ends: 13973 [2021-06-05 15:41:33,142 INFO L226 Difference]: Without dead ends: 13969 [2021-06-05 15:41:33,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8803 ImplicationChecksByTransitivity, 4491.3ms TimeCoverageRelationStatistics Valid=2057, Invalid=26335, Unknown=0, NotChecked=0, Total=28392 [2021-06-05 15:41:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-06-05 15:41:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10321. [2021-06-05 15:41:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 2.4169573643410853) internal successors, (24943), 10320 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 24943 transitions. [2021-06-05 15:41:33,260 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 24943 transitions. Word has length 67 [2021-06-05 15:41:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:33,261 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 24943 transitions. [2021-06-05 15:41:33,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 24943 transitions. [2021-06-05 15:41:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:41:33,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:33,268 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:33,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:33,468 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1944828693, now seen corresponding path program 122 times [2021-06-05 15:41:33,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:33,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735973876] [2021-06-05 15:41:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:33,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:33,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735973876] [2021-06-05 15:41:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735973876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:33,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169423748] [2021-06-05 15:41:33,738 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 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 [2021-06-05 15:41:33,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 15:41:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:34,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169423748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:34,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:34,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31] total 52 [2021-06-05 15:41:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060687071] [2021-06-05 15:41:34,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 15:41:34,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 15:41:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:41:34,683 INFO L87 Difference]: Start difference. First operand 10321 states and 24943 transitions. Second operand has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:46,825 INFO L93 Difference]: Finished difference Result 22051 states and 49545 transitions. [2021-06-05 15:41:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-06-05 15:41:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:41:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:46,843 INFO L225 Difference]: With dead ends: 22051 [2021-06-05 15:41:46,844 INFO L226 Difference]: Without dead ends: 22003 [2021-06-05 15:41:46,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26033 ImplicationChecksByTransitivity, 6924.3ms TimeCoverageRelationStatistics Valid=5439, Invalid=65051, Unknown=0, NotChecked=0, Total=70490 [2021-06-05 15:41:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22003 states. [2021-06-05 15:41:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22003 to 10745. [2021-06-05 15:41:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.415860014892033) internal successors, (25956), 10744 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 25956 transitions. [2021-06-05 15:41:47,006 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 25956 transitions. Word has length 67 [2021-06-05 15:41:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:47,006 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 25956 transitions. [2021-06-05 15:41:47,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 25956 transitions. [2021-06-05 15:41:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:41:47,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:47,013 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:47,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:47,214 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:47,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2010613401, now seen corresponding path program 123 times [2021-06-05 15:41:47,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:47,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950160724] [2021-06-05 15:41:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:47,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:47,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950160724] [2021-06-05 15:41:47,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950160724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:47,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718624881] [2021-06-05 15:41:47,490 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 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 [2021-06-05 15:41:47,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 15:41:47,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 15:41:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:48,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718624881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:48,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 53 [2021-06-05 15:41:48,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015011090] [2021-06-05 15:41:48,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:41:48,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:48,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:41:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2592, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:41:48,457 INFO L87 Difference]: Start difference. First operand 10745 states and 25956 transitions. Second operand has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:02,609 INFO L93 Difference]: Finished difference Result 25316 states and 56566 transitions. [2021-06-05 15:42:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 15:42:02,609 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:42:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:02,634 INFO L225 Difference]: With dead ends: 25316 [2021-06-05 15:42:02,634 INFO L226 Difference]: Without dead ends: 25238 [2021-06-05 15:42:02,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35837 ImplicationChecksByTransitivity, 8433.2ms TimeCoverageRelationStatistics Valid=7939, Invalid=85391, Unknown=0, NotChecked=0, Total=93330 [2021-06-05 15:42:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25238 states. [2021-06-05 15:42:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25238 to 10379. [2021-06-05 15:42:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 2.4208903449604935) internal successors, (25124), 10378 states have internal predecessors, (25124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 25124 transitions. [2021-06-05 15:42:02,799 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 25124 transitions. Word has length 67 [2021-06-05 15:42:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:02,799 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 25124 transitions. [2021-06-05 15:42:02,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 25124 transitions. [2021-06-05 15:42:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:42:02,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:02,807 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:03,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 15:42:03,007 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash -963543267, now seen corresponding path program 124 times [2021-06-05 15:42:03,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:03,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828891340] [2021-06-05 15:42:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:03,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828891340] [2021-06-05 15:42:03,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828891340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334164166] [2021-06-05 15:42:03,283 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 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 [2021-06-05 15:42:03,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:03,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:03,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-05 15:42:03,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:04,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334164166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:04,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:04,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 54 [2021-06-05 15:42:04,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388405343] [2021-06-05 15:42:04,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 15:42:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 15:42:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:42:04,235 INFO L87 Difference]: Start difference. First operand 10379 states and 25124 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:18,249 INFO L93 Difference]: Finished difference Result 28045 states and 62416 transitions. [2021-06-05 15:42:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-06-05 15:42:18,250 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:42:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:18,281 INFO L225 Difference]: With dead ends: 28045 [2021-06-05 15:42:18,281 INFO L226 Difference]: Without dead ends: 27931 [2021-06-05 15:42:18,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40964 ImplicationChecksByTransitivity, 8791.7ms TimeCoverageRelationStatistics Valid=10037, Invalid=94615, Unknown=0, NotChecked=0, Total=104652 [2021-06-05 15:42:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27931 states. [2021-06-05 15:42:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27931 to 10315. [2021-06-05 15:42:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10315 states, 10314 states have (on average 2.4203994570486715) internal successors, (24964), 10314 states have internal predecessors, (24964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 24964 transitions. [2021-06-05 15:42:18,472 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 24964 transitions. Word has length 67 [2021-06-05 15:42:18,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:18,472 INFO L482 AbstractCegarLoop]: Abstraction has 10315 states and 24964 transitions. [2021-06-05 15:42:18,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 24964 transitions. [2021-06-05 15:42:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:42:18,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:18,479 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:18,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:18,680 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1200841889, now seen corresponding path program 125 times [2021-06-05 15:42:18,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:18,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422890217] [2021-06-05 15:42:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:18,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:18,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422890217] [2021-06-05 15:42:18,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422890217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:18,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708975783] [2021-06-05 15:42:18,963 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 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 [2021-06-05 15:42:19,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-05 15:42:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 15:42:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:19,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708975783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:19,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:19,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 56 [2021-06-05 15:42:19,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125717129] [2021-06-05 15:42:19,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 15:42:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 15:42:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:42:19,860 INFO L87 Difference]: Start difference. First operand 10315 states and 24964 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:30,974 INFO L93 Difference]: Finished difference Result 31079 states and 68899 transitions. [2021-06-05 15:42:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-06-05 15:42:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:42:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:31,006 INFO L225 Difference]: With dead ends: 31079 [2021-06-05 15:42:31,006 INFO L226 Difference]: Without dead ends: 30923 [2021-06-05 15:42:31,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39065 ImplicationChecksByTransitivity, 8237.0ms TimeCoverageRelationStatistics Valid=11051, Invalid=87231, Unknown=0, NotChecked=0, Total=98282 [2021-06-05 15:42:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30923 states. [2021-06-05 15:42:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30923 to 10231. [2021-06-05 15:42:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10231 states, 10230 states have (on average 2.4218963831867057) internal successors, (24776), 10230 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10231 states to 10231 states and 24776 transitions. [2021-06-05 15:42:31,184 INFO L78 Accepts]: Start accepts. Automaton has 10231 states and 24776 transitions. Word has length 67 [2021-06-05 15:42:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:31,184 INFO L482 AbstractCegarLoop]: Abstraction has 10231 states and 24776 transitions. [2021-06-05 15:42:31,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10231 states and 24776 transitions. [2021-06-05 15:42:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:42:31,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:31,191 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:31,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-05 15:42:31,393 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1516697381, now seen corresponding path program 126 times [2021-06-05 15:42:31,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:31,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344622750] [2021-06-05 15:42:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:31,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:31,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344622750] [2021-06-05 15:42:31,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344622750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:31,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902130162] [2021-06-05 15:42:31,782 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 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 [2021-06-05 15:42:31,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-05 15:42:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 15:42:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:32,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902130162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:32,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:32,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 56 [2021-06-05 15:42:32,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606867760] [2021-06-05 15:42:32,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 15:42:32,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:32,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 15:42:32,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:42:32,655 INFO L87 Difference]: Start difference. First operand 10231 states and 24776 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:42,365 INFO L93 Difference]: Finished difference Result 35057 states and 77375 transitions. [2021-06-05 15:42:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-06-05 15:42:42,366 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:42:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:42,398 INFO L225 Difference]: With dead ends: 35057 [2021-06-05 15:42:42,398 INFO L226 Difference]: Without dead ends: 34541 [2021-06-05 15:42:42,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29483 ImplicationChecksByTransitivity, 6853.1ms TimeCoverageRelationStatistics Valid=9853, Invalid=66047, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 15:42:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34541 states. [2021-06-05 15:42:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34541 to 10223. [2021-06-05 15:42:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10223 states, 10222 states have (on average 2.422226570142829) internal successors, (24760), 10222 states have internal predecessors, (24760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10223 states to 10223 states and 24760 transitions. [2021-06-05 15:42:42,594 INFO L78 Accepts]: Start accepts. Automaton has 10223 states and 24760 transitions. Word has length 67 [2021-06-05 15:42:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:42,594 INFO L482 AbstractCegarLoop]: Abstraction has 10223 states and 24760 transitions. [2021-06-05 15:42:42,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 10223 states and 24760 transitions. [2021-06-05 15:42:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:42:42,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:42,602 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:42,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 15:42:42,809 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1386608297, now seen corresponding path program 127 times [2021-06-05 15:42:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:42,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118259592] [2021-06-05 15:42:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:43,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:43,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118259592] [2021-06-05 15:42:43,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118259592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:43,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733608066] [2021-06-05 15:42:43,098 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 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 [2021-06-05 15:42:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:42:43,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:43,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733608066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:43,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:43,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 57 [2021-06-05 15:42:43,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453139224] [2021-06-05 15:42:43,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-05 15:42:43,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:43,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-05 15:42:43,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:42:43,971 INFO L87 Difference]: Start difference. First operand 10223 states and 24760 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:51,501 INFO L93 Difference]: Finished difference Result 37059 states and 81726 transitions. [2021-06-05 15:42:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-05 15:42:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:42:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:51,539 INFO L225 Difference]: With dead ends: 37059 [2021-06-05 15:42:51,539 INFO L226 Difference]: Without dead ends: 36519 [2021-06-05 15:42:51,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22513 ImplicationChecksByTransitivity, 5621.4ms TimeCoverageRelationStatistics Valid=8563, Invalid=49759, Unknown=0, NotChecked=0, Total=58322 [2021-06-05 15:42:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36519 states. [2021-06-05 15:42:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36519 to 10263. [2021-06-05 15:42:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.420580783473007) internal successors, (24840), 10262 states have internal predecessors, (24840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 24840 transitions. [2021-06-05 15:42:51,759 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 24840 transitions. Word has length 67 [2021-06-05 15:42:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:51,759 INFO L482 AbstractCegarLoop]: Abstraction has 10263 states and 24840 transitions. [2021-06-05 15:42:51,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 24840 transitions. [2021-06-05 15:42:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:42:51,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:51,766 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:51,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 15:42:51,967 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:51,967 INFO L82 PathProgramCache]: Analyzing trace with hash -201710803, now seen corresponding path program 128 times [2021-06-05 15:42:51,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:51,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548032551] [2021-06-05 15:42:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:52,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548032551] [2021-06-05 15:42:52,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548032551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110756723] [2021-06-05 15:42:52,316 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 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 [2021-06-05 15:42:52,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 15:42:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:53,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110756723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:53,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:53,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 59 [2021-06-05 15:42:53,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898516704] [2021-06-05 15:42:53,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 15:42:53,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 15:42:53,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3118, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:42:53,214 INFO L87 Difference]: Start difference. First operand 10263 states and 24840 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:01,125 INFO L93 Difference]: Finished difference Result 36366 states and 79874 transitions. [2021-06-05 15:43:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-06-05 15:43:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:43:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:01,162 INFO L225 Difference]: With dead ends: 36366 [2021-06-05 15:43:01,162 INFO L226 Difference]: Without dead ends: 35634 [2021-06-05 15:43:01,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30002 ImplicationChecksByTransitivity, 6476.4ms TimeCoverageRelationStatistics Valid=12366, Invalid=62436, Unknown=0, NotChecked=0, Total=74802 [2021-06-05 15:43:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35634 states. [2021-06-05 15:43:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35634 to 10295. [2021-06-05 15:43:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10295 states, 10294 states have (on average 2.41927336312415) internal successors, (24904), 10294 states have internal predecessors, (24904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10295 states to 10295 states and 24904 transitions. [2021-06-05 15:43:01,373 INFO L78 Accepts]: Start accepts. Automaton has 10295 states and 24904 transitions. Word has length 67 [2021-06-05 15:43:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:01,374 INFO L482 AbstractCegarLoop]: Abstraction has 10295 states and 24904 transitions. [2021-06-05 15:43:01,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 10295 states and 24904 transitions. [2021-06-05 15:43:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:43:01,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:01,380 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:01,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:01,581 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -300073807, now seen corresponding path program 129 times [2021-06-05 15:43:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:01,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274864305] [2021-06-05 15:43:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:01,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274864305] [2021-06-05 15:43:01,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274864305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130829551] [2021-06-05 15:43:01,894 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:01,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 15:43:01,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:43:01,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:02,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130829551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:02,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:02,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-06-05 15:43:02,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169201242] [2021-06-05 15:43:02,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 15:43:02,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 15:43:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:43:02,817 INFO L87 Difference]: Start difference. First operand 10295 states and 24904 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:10,745 INFO L93 Difference]: Finished difference Result 35312 states and 77377 transitions. [2021-06-05 15:43:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-06-05 15:43:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:43:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:10,779 INFO L225 Difference]: With dead ends: 35312 [2021-06-05 15:43:10,779 INFO L226 Difference]: Without dead ends: 34400 [2021-06-05 15:43:10,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30734 ImplicationChecksByTransitivity, 6615.3ms TimeCoverageRelationStatistics Valid=13856, Invalid=63150, Unknown=0, NotChecked=0, Total=77006 [2021-06-05 15:43:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34400 states. [2021-06-05 15:43:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34400 to 10319. [2021-06-05 15:43:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 2.418298119790657) internal successors, (24952), 10318 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 24952 transitions. [2021-06-05 15:43:10,985 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 24952 transitions. Word has length 67 [2021-06-05 15:43:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:10,985 INFO L482 AbstractCegarLoop]: Abstraction has 10319 states and 24952 transitions. [2021-06-05 15:43:10,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 24952 transitions. [2021-06-05 15:43:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:43:10,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:10,992 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:11,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 15:43:11,193 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1490617141, now seen corresponding path program 130 times [2021-06-05 15:43:11,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:11,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965564904] [2021-06-05 15:43:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:11,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:11,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965564904] [2021-06-05 15:43:11,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965564904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:11,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610634773] [2021-06-05 15:43:11,525 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 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 [2021-06-05 15:43:11,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:43:11,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:12,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610634773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:12,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:12,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-06-05 15:43:12,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282616652] [2021-06-05 15:43:12,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-06-05 15:43:12,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:12,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-06-05 15:43:12,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:43:12,484 INFO L87 Difference]: Start difference. First operand 10319 states and 24952 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:20,441 INFO L93 Difference]: Finished difference Result 33658 states and 73530 transitions. [2021-06-05 15:43:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-06-05 15:43:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:43:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:20,472 INFO L225 Difference]: With dead ends: 33658 [2021-06-05 15:43:20,473 INFO L226 Difference]: Without dead ends: 32578 [2021-06-05 15:43:20,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33793 ImplicationChecksByTransitivity, 7043.5ms TimeCoverageRelationStatistics Valid=16733, Invalid=67077, Unknown=0, NotChecked=0, Total=83810 [2021-06-05 15:43:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32578 states. [2021-06-05 15:43:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32578 to 10335. [2021-06-05 15:43:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.4176504741629574) internal successors, (24984), 10334 states have internal predecessors, (24984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 24984 transitions. [2021-06-05 15:43:20,664 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 24984 transitions. Word has length 67 [2021-06-05 15:43:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:20,664 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 24984 transitions. [2021-06-05 15:43:20,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 24984 transitions. [2021-06-05 15:43:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:43:20,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:20,670 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:20,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:20,871 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:20,871 INFO L82 PathProgramCache]: Analyzing trace with hash 805779129, now seen corresponding path program 131 times [2021-06-05 15:43:20,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:20,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492468556] [2021-06-05 15:43:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:21,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:21,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492468556] [2021-06-05 15:43:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492468556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:21,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660473729] [2021-06-05 15:43:21,218 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 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 [2021-06-05 15:43:21,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 15:43:21,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:43:21,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:22,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660473729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:22,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:22,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-06-05 15:43:22,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372172538] [2021-06-05 15:43:22,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-05 15:43:22,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:22,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-05 15:43:22,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3340, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:43:22,082 INFO L87 Difference]: Start difference. First operand 10335 states and 24984 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:31,287 INFO L93 Difference]: Finished difference Result 29282 states and 65375 transitions. [2021-06-05 15:43:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-06-05 15:43:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:43:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:31,314 INFO L225 Difference]: With dead ends: 29282 [2021-06-05 15:43:31,314 INFO L226 Difference]: Without dead ends: 28076 [2021-06-05 15:43:31,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39537 ImplicationChecksByTransitivity, 8183.9ms TimeCoverageRelationStatistics Valid=20497, Invalid=75913, Unknown=0, NotChecked=0, Total=96410 [2021-06-05 15:43:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28076 states. [2021-06-05 15:43:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28076 to 10468. [2021-06-05 15:43:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3830132798318524) internal successors, (24943), 10467 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 24943 transitions. [2021-06-05 15:43:31,500 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 24943 transitions. Word has length 67 [2021-06-05 15:43:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:31,500 INFO L482 AbstractCegarLoop]: Abstraction has 10468 states and 24943 transitions. [2021-06-05 15:43:31,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 24943 transitions. [2021-06-05 15:43:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:43:31,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:31,508 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:31,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:31,709 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1637879469, now seen corresponding path program 132 times [2021-06-05 15:43:31,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:31,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874695158] [2021-06-05 15:43:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:31,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:31,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874695158] [2021-06-05 15:43:31,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874695158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:31,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024769183] [2021-06-05 15:43:31,888 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 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 [2021-06-05 15:43:31,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 15:43:31,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:31,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 15:43:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:32,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024769183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:32,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:32,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 49 [2021-06-05 15:43:32,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521989188] [2021-06-05 15:43:32,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 15:43:32,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:32,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 15:43:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:43:32,773 INFO L87 Difference]: Start difference. First operand 10468 states and 24943 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:46,990 INFO L93 Difference]: Finished difference Result 20078 states and 44963 transitions. [2021-06-05 15:43:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-06-05 15:43:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:43:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:47,007 INFO L225 Difference]: With dead ends: 20078 [2021-06-05 15:43:47,007 INFO L226 Difference]: Without dead ends: 20074 [2021-06-05 15:43:47,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88148 ImplicationChecksByTransitivity, 13196.3ms TimeCoverageRelationStatistics Valid=38110, Invalid=144646, Unknown=0, NotChecked=0, Total=182756 [2021-06-05 15:43:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20074 states. [2021-06-05 15:43:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20074 to 10541. [2021-06-05 15:43:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10541 states, 10540 states have (on average 2.3928842504743835) internal successors, (25221), 10540 states have internal predecessors, (25221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 25221 transitions. [2021-06-05 15:43:47,207 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 25221 transitions. Word has length 67 [2021-06-05 15:43:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:47,207 INFO L482 AbstractCegarLoop]: Abstraction has 10541 states and 25221 transitions. [2021-06-05 15:43:47,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 25221 transitions. [2021-06-05 15:43:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 15:43:47,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:47,215 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:47,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-06-05 15:43:47,415 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash 192572857, now seen corresponding path program 133 times [2021-06-05 15:43:47,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:47,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556988550] [2021-06-05 15:43:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:47,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:47,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556988550] [2021-06-05 15:43:47,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556988550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:47,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611411907] [2021-06-05 15:43:47,811 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 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 [2021-06-05 15:43:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:43:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:48,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611411907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:48,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:48,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2021-06-05 15:43:48,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288349135] [2021-06-05 15:43:48,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-06-05 15:43:48,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-06-05 15:43:48,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:43:48,738 INFO L87 Difference]: Start difference. First operand 10541 states and 25221 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:58,235 INFO L93 Difference]: Finished difference Result 14048 states and 32048 transitions. [2021-06-05 15:43:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-06-05 15:43:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 15:43:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:58,245 INFO L225 Difference]: With dead ends: 14048 [2021-06-05 15:43:58,246 INFO L226 Difference]: Without dead ends: 13436 [2021-06-05 15:43:58,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42486 ImplicationChecksByTransitivity, 8607.3ms TimeCoverageRelationStatistics Valid=27030, Invalid=73142, Unknown=0, NotChecked=0, Total=100172 [2021-06-05 15:43:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2021-06-05 15:43:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 10532. [2021-06-05 15:43:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.3910359889849016) internal successors, (25180), 10531 states have internal predecessors, (25180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25180 transitions. [2021-06-05 15:43:58,357 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25180 transitions. Word has length 69 [2021-06-05 15:43:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:58,358 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25180 transitions. [2021-06-05 15:43:58,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25180 transitions. [2021-06-05 15:43:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 15:43:58,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:58,365 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:58,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:58,565 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1907055525, now seen corresponding path program 134 times [2021-06-05 15:43:58,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:58,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478324006] [2021-06-05 15:43:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:58,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:58,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478324006] [2021-06-05 15:43:58,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478324006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:58,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276615045] [2021-06-05 15:43:58,737 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 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 [2021-06-05 15:43:58,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:58,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:58,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:43:58,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:59,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276615045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:59,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:59,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32] total 48 [2021-06-05 15:43:59,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544696141] [2021-06-05 15:43:59,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 15:43:59,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:59,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 15:43:59,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1881, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:43:59,612 INFO L87 Difference]: Start difference. First operand 10532 states and 25180 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:44:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-06-05 15:44:07,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:07,049 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:44:07,050 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:44:07,051 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:44:07,051 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:44:07 BasicIcfg [2021-06-05 15:44:07,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:44:07,052 INFO L168 Benchmark]: Toolchain (without parser) took 725432.79 ms. Allocated memory was 339.7 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 319.4 MB in the beginning and 785.4 MB in the end (delta: -466.0 MB). Peak memory consumption was 674.3 MB. Max. memory is 16.0 GB. [2021-06-05 15:44:07,052 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 339.7 MB. Free memory was 320.5 MB in the beginning and 320.4 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:44:07,052 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 339.7 MB. Free memory was 319.3 MB in the beginning and 317.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:44:07,052 INFO L168 Benchmark]: Boogie Preprocessor took 17.78 ms. Allocated memory is still 339.7 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 938.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:44:07,052 INFO L168 Benchmark]: RCFGBuilder took 239.26 ms. Allocated memory is still 339.7 MB. Free memory was 316.8 MB in the beginning and 305.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 15:44:07,052 INFO L168 Benchmark]: TraceAbstraction took 725142.19 ms. Allocated memory was 339.7 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 305.3 MB in the beginning and 785.4 MB in the end (delta: -480.0 MB). Peak memory consumption was 659.6 MB. Max. memory is 16.0 GB. [2021-06-05 15:44:07,052 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 0.15 ms. Allocated memory is still 339.7 MB. Free memory was 320.5 MB in the beginning and 320.4 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 339.7 MB. Free memory was 319.3 MB in the beginning and 317.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.78 ms. Allocated memory is still 339.7 MB. Free memory was 317.9 MB in the beginning and 316.9 MB in the end (delta: 938.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 239.26 ms. Allocated memory is still 339.7 MB. Free memory was 316.8 MB in the beginning and 305.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 725142.19 ms. Allocated memory was 339.7 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 305.3 MB in the beginning and 785.4 MB in the end (delta: -480.0 MB). Peak memory consumption was 659.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10532states) and FLOYD_HOARE automaton (currently 231 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 275 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10532states) and FLOYD_HOARE automaton (currently 231 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 275 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (10532states) and FLOYD_HOARE automaton (currently 231 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 275 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 725033.5ms, OverallIterations: 136, TraceHistogramMax: 14, EmptinessCheckTime: 531.6ms, AutomataDifference: 586699.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8413 SDtfs, 70702 SDslu, 142990 SDs, 0 SdLazy, 415200 SolverSat, 21448 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 141031.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24803 GetRequests, 4485 SyntacticMatches, 88 SemanticMatches, 20229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684752 ImplicationChecksByTransitivity, 462581.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10745occurred in iteration=124, InterpolantAutomatonStates: 15929, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10107.6ms AutomataMinimizationTime, 135 MinimizatonAttempts, 828612 StatesRemovedByMinimization, 135 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 570.4ms SsaConstructionTime, 2833.5ms SatisfiabilityAnalysisTime, 93643.3ms InterpolantComputationTime, 13120 NumberOfCodeBlocks, 13120 NumberOfCodeBlocksAsserted, 964 NumberOfCheckSat, 12850 ConstructedInterpolants, 0 QuantifiedInterpolants, 117854 SizeOfPredicates, 503 NumberOfNonLiveVariables, 15221 ConjunctsInSsa, 5646 ConjunctsInUnsatCore, 270 InterpolantComputations, 2 PerfectInterpolantSequences, 8126/44611 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