/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:24:03,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:24:03,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:24:03,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:24:03,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:24:03,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:24:03,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:24:03,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:24:03,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:24:03,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:24:03,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:24:03,482 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:24:03,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:24:03,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:24:03,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:24:03,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:24:03,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:24:03,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:24:03,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:24:03,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:24:03,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:24:03,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:24:03,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:24:03,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:24:03,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:24:03,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:24:03,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:24:03,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:24:03,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:24:03,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:24:03,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:24:03,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:24:03,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:24:03,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:24:03,485 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:24:03,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:24:03,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:24:03,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:24:03,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:24:03,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:24:03,796 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:24:03,797 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:24:03,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2021-06-05 21:24:03,798 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2021-06-05 21:24:03,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:24:03,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:24:03,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:24:03,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:24:03,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:24:03,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:24:03,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:24:03,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:24:03,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:24:03,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/1) ... [2021-06-05 21:24:03,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:24:03,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:24:03,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:24:03,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:24:03,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (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 21:24:03,953 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:24:03,954 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:24:03,954 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:24:03,954 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:24:03,954 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:24:03,954 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:24:03,954 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:24:03,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:24:03,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:24:03,955 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 21:24:04,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:24:04,229 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:24:04,230 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 21:24:04,230 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 21:24:04,231 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:24:04 BoogieIcfgContainer [2021-06-05 21:24:04,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:24:04,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:24:04,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:24:04,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:24:04,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:24:03" (1/2) ... [2021-06-05 21:24:04,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28236015 and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:24:04, skipping insertion in model container [2021-06-05 21:24:04,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:24:04" (2/2) ... [2021-06-05 21:24:04,237 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2021-06-05 21:24:04,256 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:24:04,256 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:24:04,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:24:04,257 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:24:04,310 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:24:04,327 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:24:04,343 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:24:04,343 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:24:04,344 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:24:04,344 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:24:04,344 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:24:04,344 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:24:04,344 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:24:04,344 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:24:04,351 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 21:24:04,359 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 21:24:04,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:04,366 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:04,366 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:04,370 INFO L82 PathProgramCache]: Analyzing trace with hash -525039273, now seen corresponding path program 1 times [2021-06-05 21:24:04,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:04,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082813832] [2021-06-05 21:24:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:04,475 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 21:24:04,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:04,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082813832] [2021-06-05 21:24:04,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082813832] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:24:04,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:24:04,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:24:04,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956137747] [2021-06-05 21:24:04,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:24:04,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:24:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:24:04,492 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:04,509 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 21:24:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:24:04,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 21:24:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:04,518 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:24:04,518 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 21:24:04,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:24:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 21:24:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 21:24:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 21:24:04,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 21:24:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:04,545 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 21:24:04,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 21:24:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:24:04,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:04,546 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:04,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:24:04,546 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1892497481, now seen corresponding path program 1 times [2021-06-05 21:24:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:04,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571576809] [2021-06-05 21:24:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:04,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:04,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571576809] [2021-06-05 21:24:04,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571576809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127137022] [2021-06-05 21:24:04,583 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 21:24:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:24:04,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:04,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127137022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:04,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:04,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 21:24:04,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904599544] [2021-06-05 21:24:04,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:24:04,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:24:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:24:04,717 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:04,752 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 21:24:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:24:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:24:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:04,754 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:24:04,754 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 21:24:04,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:24:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 21:24:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 21:24:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 21:24:04,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 21:24:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:04,767 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 21:24:04,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 21:24:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:24:04,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:04,769 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:04,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:24:04,982 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash 904379190, now seen corresponding path program 1 times [2021-06-05 21:24:04,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:04,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358921996] [2021-06-05 21:24:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:05,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358921996] [2021-06-05 21:24:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358921996] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:24:05,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:24:05,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:24:05,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8533239] [2021-06-05 21:24:05,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:24:05,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:05,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:24:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:24:05,049 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:05,086 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 21:24:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:24:05,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:24:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:05,091 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:24:05,091 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 21:24:05,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:24:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 21:24:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 21:24:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 21:24:05,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 21:24:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:05,095 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 21:24:05,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 21:24:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:24:05,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:05,096 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:05,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:24:05,097 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:05,097 INFO L82 PathProgramCache]: Analyzing trace with hash -974494568, now seen corresponding path program 2 times [2021-06-05 21:24:05,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:05,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117992159] [2021-06-05 21:24:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:05,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:05,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117992159] [2021-06-05 21:24:05,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117992159] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:24:05,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:24:05,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:24:05,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29518254] [2021-06-05 21:24:05,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:24:05,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:05,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:24:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:24:05,147 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:05,168 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 21:24:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:24:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:24:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:05,170 INFO L225 Difference]: With dead ends: 20 [2021-06-05 21:24:05,171 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 21:24:05,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:24:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 21:24:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 21:24:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 21:24:05,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 21:24:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:05,179 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 21:24:05,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 21:24:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:24:05,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:05,180 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:05,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:24:05,181 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1462847702, now seen corresponding path program 1 times [2021-06-05 21:24:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:05,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342271663] [2021-06-05 21:24:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:05,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:05,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342271663] [2021-06-05 21:24:05,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342271663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:05,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735534919] [2021-06-05 21:24:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:24:05,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:05,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735534919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:05,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:05,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 21:24:05,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582758497] [2021-06-05 21:24:05,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:24:05,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:05,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:24:05,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:24:05,336 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:05,355 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 21:24:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:24:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:24:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:05,357 INFO L225 Difference]: With dead ends: 24 [2021-06-05 21:24:05,357 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 21:24:05,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:24:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 21:24:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 21:24:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 21:24:05,360 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 21:24:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:05,360 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 21:24:05,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 21:24:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:24:05,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:05,361 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:05,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:05,564 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1595502390, now seen corresponding path program 2 times [2021-06-05 21:24:05,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:05,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497686764] [2021-06-05 21:24:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:05,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:05,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497686764] [2021-06-05 21:24:05,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497686764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:05,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213598453] [2021-06-05 21:24:05,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:05,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:05,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:24:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:05,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213598453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:05,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:05,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 21:24:05,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084832592] [2021-06-05 21:24:05,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:24:05,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:05,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:24:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:24:05,693 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:05,716 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 21:24:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:24:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:24:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:05,717 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:24:05,717 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 21:24:05,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:24:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 21:24:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 21:24:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 21:24:05,721 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 21:24:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:05,721 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 21:24:05,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 21:24:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:24:05,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:05,722 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:05,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:05,946 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:05,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1412830422, now seen corresponding path program 3 times [2021-06-05 21:24:05,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:05,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372168761] [2021-06-05 21:24:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:06,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372168761] [2021-06-05 21:24:06,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372168761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327589933] [2021-06-05 21:24:06,051 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 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 21:24:06,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:24:06,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:24:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327589933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:06,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:06,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:24:06,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608768566] [2021-06-05 21:24:06,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:06,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:06,177 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:24:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:06,224 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-06-05 21:24:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:24:06,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:24:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:06,227 INFO L225 Difference]: With dead ends: 32 [2021-06-05 21:24:06,227 INFO L226 Difference]: Without dead ends: 32 [2021-06-05 21:24:06,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-05 21:24:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-06-05 21:24:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 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 21:24:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-06-05 21:24:06,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-06-05 21:24:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:06,236 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-06-05 21:24:06,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:24:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-06-05 21:24:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:24:06,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:06,238 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:06,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:06,453 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash 44966710, now seen corresponding path program 4 times [2021-06-05 21:24:06,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:06,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034783771] [2021-06-05 21:24:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:06,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:06,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034783771] [2021-06-05 21:24:06,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034783771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:06,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678543621] [2021-06-05 21:24:06,532 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 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 21:24:06,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:06,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:24:06,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:06,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:06,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:24:06,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:06,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:06,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:06,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:24:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:06,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678543621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:06,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:06,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 21:24:06,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849416962] [2021-06-05 21:24:06,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:24:06,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:24:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:06,792 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:06,881 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-06-05 21:24:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:24:06,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:24:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:06,886 INFO L225 Difference]: With dead ends: 80 [2021-06-05 21:24:06,886 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 21:24:06,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 21:24:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-06-05 21:24:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2021-06-05 21:24:06,895 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2021-06-05 21:24:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:06,895 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2021-06-05 21:24:06,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2021-06-05 21:24:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:24:06,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:06,896 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:07,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:07,096 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1649963104, now seen corresponding path program 5 times [2021-06-05 21:24:07,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:07,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112325183] [2021-06-05 21:24:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:07,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:07,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112325183] [2021-06-05 21:24:07,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112325183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:07,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802074388] [2021-06-05 21:24:07,142 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 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 21:24:07,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:24:07,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:24:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:07,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:07,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:24:07,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:07,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:07,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:07,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:24:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:07,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802074388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:07,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:07,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 21:24:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768583187] [2021-06-05 21:24:07,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:24:07,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:24:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:07,324 INFO L87 Difference]: Start difference. First operand 44 states and 94 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:07,392 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-06-05 21:24:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:24:07,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:24:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:07,393 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:24:07,393 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 21:24:07,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 21:24:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-06-05 21:24:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2021-06-05 21:24:07,399 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2021-06-05 21:24:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:07,399 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2021-06-05 21:24:07,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2021-06-05 21:24:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:24:07,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:07,400 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:07,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:07,624 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2019211880, now seen corresponding path program 6 times [2021-06-05 21:24:07,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:07,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907293836] [2021-06-05 21:24:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:07,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:07,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907293836] [2021-06-05 21:24:07,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907293836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:07,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461105911] [2021-06-05 21:24:07,683 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 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 21:24:07,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:24:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:24:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:07,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:07,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:24:07,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:07,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:07,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:07,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:24:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:07,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461105911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:07,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:07,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 21:24:07,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785102120] [2021-06-05 21:24:07,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:24:07,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:24:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:07,937 INFO L87 Difference]: Start difference. First operand 51 states and 119 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:08,037 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2021-06-05 21:24:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:24:08,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:24:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:08,039 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:24:08,039 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 21:24:08,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 21:24:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-06-05 21:24:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-06-05 21:24:08,055 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2021-06-05 21:24:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:08,055 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-06-05 21:24:08,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-06-05 21:24:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:24:08,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:08,056 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:08,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 21:24:08,283 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash 200480608, now seen corresponding path program 7 times [2021-06-05 21:24:08,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:08,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179816279] [2021-06-05 21:24:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:08,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179816279] [2021-06-05 21:24:08,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179816279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345716609] [2021-06-05 21:24:08,331 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 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 21:24:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:24:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:08,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:08,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:24:08,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:08,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:08,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:08,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:24:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:08,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345716609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:08,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:08,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 21:24:08,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231872053] [2021-06-05 21:24:08,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:24:08,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:24:08,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:08,542 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:08,604 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-05 21:24:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:24:08,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:24:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:08,606 INFO L225 Difference]: With dead ends: 108 [2021-06-05 21:24:08,606 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 21:24:08,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 21:24:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-06-05 21:24:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2021-06-05 21:24:08,616 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2021-06-05 21:24:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:08,616 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2021-06-05 21:24:08,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2021-06-05 21:24:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:24:08,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:08,618 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:08,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 21:24:08,841 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash 291471000, now seen corresponding path program 8 times [2021-06-05 21:24:08,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:08,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169950882] [2021-06-05 21:24:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:08,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:08,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169950882] [2021-06-05 21:24:08,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169950882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:08,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458598210] [2021-06-05 21:24:08,893 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 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 21:24:08,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:08,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:08,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:24:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:09,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:09,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:24:09,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:09,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:09,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:09,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:24:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:09,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458598210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:09,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:09,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 21:24:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131812345] [2021-06-05 21:24:09,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:24:09,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:24:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:09,114 INFO L87 Difference]: Start difference. First operand 68 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:09,198 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2021-06-05 21:24:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:24:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:24:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:09,199 INFO L225 Difference]: With dead ends: 119 [2021-06-05 21:24:09,199 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:24:09,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:24:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-06-05 21:24:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2021-06-05 21:24:09,210 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2021-06-05 21:24:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:09,210 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2021-06-05 21:24:09,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2021-06-05 21:24:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:09,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:09,214 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:09,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:24:09,437 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:09,437 INFO L82 PathProgramCache]: Analyzing trace with hash 590864598, now seen corresponding path program 9 times [2021-06-05 21:24:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:09,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654934659] [2021-06-05 21:24:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:09,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:09,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654934659] [2021-06-05 21:24:09,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654934659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:09,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058313685] [2021-06-05 21:24:09,490 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 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 21:24:09,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:24:09,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:09,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:09,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058313685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:09,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:09,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:09,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009036216] [2021-06-05 21:24:09,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:09,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:09,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:09,591 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:09,682 INFO L93 Difference]: Finished difference Result 141 states and 295 transitions. [2021-06-05 21:24:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:24:09,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:09,684 INFO L225 Difference]: With dead ends: 141 [2021-06-05 21:24:09,684 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 21:24:09,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 21:24:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 81. [2021-06-05 21:24:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.7375) internal successors, (219), 80 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 219 transitions. [2021-06-05 21:24:09,688 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 219 transitions. Word has length 15 [2021-06-05 21:24:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:09,688 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 219 transitions. [2021-06-05 21:24:09,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 219 transitions. [2021-06-05 21:24:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:09,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:09,689 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:09,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:09,913 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:09,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:09,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1394695479, now seen corresponding path program 10 times [2021-06-05 21:24:09,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:09,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460136265] [2021-06-05 21:24:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:09,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:09,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460136265] [2021-06-05 21:24:09,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460136265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:09,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279840515] [2021-06-05 21:24:09,962 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 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 21:24:10,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:10,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279840515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:10,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:10,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:10,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132356673] [2021-06-05 21:24:10,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:10,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:10,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:10,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:10,046 INFO L87 Difference]: Start difference. First operand 81 states and 219 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:10,218 INFO L93 Difference]: Finished difference Result 161 states and 349 transitions. [2021-06-05 21:24:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:10,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:10,219 INFO L225 Difference]: With dead ends: 161 [2021-06-05 21:24:10,219 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:24:10,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:24:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:24:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2021-06-05 21:24:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2021-06-05 21:24:10,224 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2021-06-05 21:24:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:10,224 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2021-06-05 21:24:10,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2021-06-05 21:24:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:10,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:10,225 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:10,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 21:24:10,438 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash -359013994, now seen corresponding path program 11 times [2021-06-05 21:24:10,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:10,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422181989] [2021-06-05 21:24:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:10,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:10,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422181989] [2021-06-05 21:24:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422181989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:10,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063407512] [2021-06-05 21:24:10,487 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 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 21:24:10,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:24:10,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:10,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:10,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063407512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:10,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:10,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:10,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702608417] [2021-06-05 21:24:10,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:10,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:10,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:10,571 INFO L87 Difference]: Start difference. First operand 98 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:10,680 INFO L93 Difference]: Finished difference Result 121 states and 296 transitions. [2021-06-05 21:24:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:10,683 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:24:10,683 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:24:10,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:24:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-06-05 21:24:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-06-05 21:24:10,690 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-06-05 21:24:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:10,690 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-06-05 21:24:10,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-06-05 21:24:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:10,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:10,691 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:10,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:10,915 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash 563404739, now seen corresponding path program 12 times [2021-06-05 21:24:10,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:10,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583497510] [2021-06-05 21:24:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:10,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:10,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583497510] [2021-06-05 21:24:10,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583497510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:10,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156530061] [2021-06-05 21:24:10,962 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 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 21:24:10,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:24:10,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:10,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:11,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156530061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:11,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:11,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177232946] [2021-06-05 21:24:11,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:11,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:11,044 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:11,090 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2021-06-05 21:24:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:24:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:11,091 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:24:11,091 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:24:11,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:24:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2021-06-05 21:24:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-06-05 21:24:11,095 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-06-05 21:24:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:11,095 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-06-05 21:24:11,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-06-05 21:24:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:11,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:11,096 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:11,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 21:24:11,309 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1473313992, now seen corresponding path program 13 times [2021-06-05 21:24:11,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:11,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709736942] [2021-06-05 21:24:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:11,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709736942] [2021-06-05 21:24:11,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709736942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:11,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115689317] [2021-06-05 21:24:11,360 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 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 21:24:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:11,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:11,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:11,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115689317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:11,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:11,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:11,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313986707] [2021-06-05 21:24:11,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:11,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:11,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:11,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:11,447 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:11,505 INFO L93 Difference]: Finished difference Result 169 states and 365 transitions. [2021-06-05 21:24:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:24:11,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:11,507 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:24:11,507 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 21:24:11,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:11,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 21:24:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 104. [2021-06-05 21:24:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.70873786407767) internal successors, (279), 103 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 279 transitions. [2021-06-05 21:24:11,511 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 279 transitions. Word has length 15 [2021-06-05 21:24:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:11,512 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 279 transitions. [2021-06-05 21:24:11,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 279 transitions. [2021-06-05 21:24:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:11,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:11,512 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:11,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:11,729 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -390023859, now seen corresponding path program 14 times [2021-06-05 21:24:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267571774] [2021-06-05 21:24:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:11,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267571774] [2021-06-05 21:24:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267571774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226360942] [2021-06-05 21:24:11,768 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 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 21:24:11,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:11,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:11,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226360942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:11,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:11,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:11,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347427982] [2021-06-05 21:24:11,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:11,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:11,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:11,833 INFO L87 Difference]: Start difference. First operand 104 states and 279 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:11,919 INFO L93 Difference]: Finished difference Result 177 states and 389 transitions. [2021-06-05 21:24:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:11,920 INFO L225 Difference]: With dead ends: 177 [2021-06-05 21:24:11,921 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 21:24:11,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 21:24:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 110. [2021-06-05 21:24:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.761467889908257) internal successors, (301), 109 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 301 transitions. [2021-06-05 21:24:11,925 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 301 transitions. Word has length 15 [2021-06-05 21:24:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:11,925 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 301 transitions. [2021-06-05 21:24:11,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 301 transitions. [2021-06-05 21:24:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:11,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:11,925 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:12,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 21:24:12,149 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash 266778318, now seen corresponding path program 15 times [2021-06-05 21:24:12,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:12,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660223310] [2021-06-05 21:24:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:12,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:12,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660223310] [2021-06-05 21:24:12,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660223310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:12,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957924556] [2021-06-05 21:24:12,194 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 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 21:24:12,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:24:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:12,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:12,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957924556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:12,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:12,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:12,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640218705] [2021-06-05 21:24:12,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:12,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:12,258 INFO L87 Difference]: Start difference. First operand 110 states and 301 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:12,337 INFO L93 Difference]: Finished difference Result 167 states and 373 transitions. [2021-06-05 21:24:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:12,339 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:24:12,339 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:24:12,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:24:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2021-06-05 21:24:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-06-05 21:24:12,343 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-06-05 21:24:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:12,343 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-06-05 21:24:12,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-06-05 21:24:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:12,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:12,344 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:12,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:12,566 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:12,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1189197051, now seen corresponding path program 16 times [2021-06-05 21:24:12,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:12,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528129048] [2021-06-05 21:24:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:12,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:12,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528129048] [2021-06-05 21:24:12,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528129048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:12,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840437729] [2021-06-05 21:24:12,603 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 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 21:24:12,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:12,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:12,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:12,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840437729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:12,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:12,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:12,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582394579] [2021-06-05 21:24:12,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:12,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:12,664 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:12,704 INFO L93 Difference]: Finished difference Result 181 states and 397 transitions. [2021-06-05 21:24:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:24:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:12,706 INFO L225 Difference]: With dead ends: 181 [2021-06-05 21:24:12,706 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:24:12,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:24:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 110. [2021-06-05 21:24:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-06-05 21:24:12,710 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-06-05 21:24:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:12,710 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-06-05 21:24:12,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-06-05 21:24:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:12,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:12,710 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:12,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 21:24:12,933 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:12,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1977391626, now seen corresponding path program 17 times [2021-06-05 21:24:12,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:12,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740085062] [2021-06-05 21:24:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:12,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740085062] [2021-06-05 21:24:12,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740085062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925973880] [2021-06-05 21:24:12,992 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 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 21:24:13,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:24:13,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:13,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925973880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:13,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:13,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:13,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465211220] [2021-06-05 21:24:13,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:13,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:13,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:13,070 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:13,160 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2021-06-05 21:24:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:24:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:13,162 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:24:13,162 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:24:13,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:24:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2021-06-05 21:24:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-06-05 21:24:13,166 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-06-05 21:24:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:13,166 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-06-05 21:24:13,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-06-05 21:24:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:13,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:13,168 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:13,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 21:24:13,381 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash -539850283, now seen corresponding path program 18 times [2021-06-05 21:24:13,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:13,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821653286] [2021-06-05 21:24:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:13,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:13,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821653286] [2021-06-05 21:24:13,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821653286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:13,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827576065] [2021-06-05 21:24:13,425 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 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 21:24:13,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:24:13,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:13,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827576065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:13,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:13,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:13,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705750480] [2021-06-05 21:24:13,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:13,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:13,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:13,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:13,512 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:13,583 INFO L93 Difference]: Finished difference Result 194 states and 419 transitions. [2021-06-05 21:24:13,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:24:13,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:13,584 INFO L225 Difference]: With dead ends: 194 [2021-06-05 21:24:13,585 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 21:24:13,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:24:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 21:24:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2021-06-05 21:24:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-06-05 21:24:13,590 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-06-05 21:24:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:13,590 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-06-05 21:24:13,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-06-05 21:24:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:13,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:13,591 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:13,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:24:13,805 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 746378496, now seen corresponding path program 19 times [2021-06-05 21:24:13,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:13,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919593055] [2021-06-05 21:24:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:13,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:13,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919593055] [2021-06-05 21:24:13,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919593055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:13,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248533657] [2021-06-05 21:24:13,847 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 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 21:24:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:13,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:13,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248533657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:13,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:13,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:13,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545713670] [2021-06-05 21:24:13,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:13,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:13,924 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:13,970 INFO L93 Difference]: Finished difference Result 186 states and 412 transitions. [2021-06-05 21:24:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:24:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:13,971 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:24:13,971 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:24:13,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:24:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:24:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 116. [2021-06-05 21:24:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.756521739130435) internal successors, (317), 115 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 317 transitions. [2021-06-05 21:24:13,976 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 317 transitions. Word has length 15 [2021-06-05 21:24:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:13,976 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 317 transitions. [2021-06-05 21:24:13,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 317 transitions. [2021-06-05 21:24:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:13,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:13,977 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:14,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 21:24:14,200 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1829668629, now seen corresponding path program 20 times [2021-06-05 21:24:14,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:14,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235403379] [2021-06-05 21:24:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:14,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:14,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235403379] [2021-06-05 21:24:14,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235403379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:14,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437721002] [2021-06-05 21:24:14,239 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 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 21:24:14,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:14,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:14,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437721002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:14,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:14,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647649785] [2021-06-05 21:24:14,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:14,320 INFO L87 Difference]: Start difference. First operand 116 states and 317 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:14,415 INFO L93 Difference]: Finished difference Result 190 states and 428 transitions. [2021-06-05 21:24:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:14,417 INFO L225 Difference]: With dead ends: 190 [2021-06-05 21:24:14,417 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 21:24:14,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 21:24:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-06-05 21:24:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.8048780487804876) internal successors, (345), 123 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 345 transitions. [2021-06-05 21:24:14,422 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 345 transitions. Word has length 15 [2021-06-05 21:24:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:14,422 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 345 transitions. [2021-06-05 21:24:14,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:14,422 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 345 transitions. [2021-06-05 21:24:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:14,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:14,423 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:14,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:14,637 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1808496490, now seen corresponding path program 21 times [2021-06-05 21:24:14,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:14,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240270763] [2021-06-05 21:24:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:14,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:14,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240270763] [2021-06-05 21:24:14,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240270763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:14,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19319728] [2021-06-05 21:24:14,683 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 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 21:24:14,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:24:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19319728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:14,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:14,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:14,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624217572] [2021-06-05 21:24:14,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:14,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:14,741 INFO L87 Difference]: Start difference. First operand 124 states and 345 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:14,826 INFO L93 Difference]: Finished difference Result 188 states and 429 transitions. [2021-06-05 21:24:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:14,827 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:24:14,827 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:24:14,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:24:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2021-06-05 21:24:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-06-05 21:24:14,833 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-06-05 21:24:14,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:14,833 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-06-05 21:24:14,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-06-05 21:24:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:14,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:14,834 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:15,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:15,057 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash -886077757, now seen corresponding path program 22 times [2021-06-05 21:24:15,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:15,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300419718] [2021-06-05 21:24:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:15,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:15,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300419718] [2021-06-05 21:24:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300419718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027021813] [2021-06-05 21:24:15,095 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 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 21:24:15,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:15,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:15,167 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 21:24:15,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027021813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:15,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:15,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:15,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771076302] [2021-06-05 21:24:15,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:15,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:15,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:15,169 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:15,214 INFO L93 Difference]: Finished difference Result 191 states and 431 transitions. [2021-06-05 21:24:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:24:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:15,215 INFO L225 Difference]: With dead ends: 191 [2021-06-05 21:24:15,215 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 21:24:15,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 21:24:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-06-05 21:24:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-06-05 21:24:15,225 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-06-05 21:24:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:15,225 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-06-05 21:24:15,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-06-05 21:24:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:15,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:15,227 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:15,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 21:24:15,441 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:15,441 INFO L82 PathProgramCache]: Analyzing trace with hash -97883182, now seen corresponding path program 23 times [2021-06-05 21:24:15,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:15,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316343011] [2021-06-05 21:24:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:15,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316343011] [2021-06-05 21:24:15,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316343011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395536805] [2021-06-05 21:24:15,488 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 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 21:24:15,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:24:15,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:15,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:15,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395536805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:15,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:15,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:15,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082823955] [2021-06-05 21:24:15,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:15,563 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:15,681 INFO L93 Difference]: Finished difference Result 193 states and 435 transitions. [2021-06-05 21:24:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:24:15,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:15,682 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:24:15,682 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 21:24:15,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 21:24:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-06-05 21:24:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-06-05 21:24:15,686 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-06-05 21:24:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:15,686 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-06-05 21:24:15,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-06-05 21:24:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:15,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:15,687 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:15,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:15,897 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1679842205, now seen corresponding path program 24 times [2021-06-05 21:24:15,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:15,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218999555] [2021-06-05 21:24:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:15,955 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 21:24:15,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:15,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218999555] [2021-06-05 21:24:15,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218999555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:15,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065506620] [2021-06-05 21:24:15,955 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 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 21:24:15,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:24:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:16,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065506620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:16,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:16,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:16,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771615728] [2021-06-05 21:24:16,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:16,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:16,032 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:16,097 INFO L93 Difference]: Finished difference Result 200 states and 445 transitions. [2021-06-05 21:24:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:24:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:16,098 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:24:16,098 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:24:16,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:24:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:24:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 124. [2021-06-05 21:24:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-06-05 21:24:16,103 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-06-05 21:24:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:16,103 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-06-05 21:24:16,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-06-05 21:24:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:16,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:16,105 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:16,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 21:24:16,328 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1391521814, now seen corresponding path program 25 times [2021-06-05 21:24:16,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:16,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477780421] [2021-06-05 21:24:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:16,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:16,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477780421] [2021-06-05 21:24:16,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477780421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:16,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438556003] [2021-06-05 21:24:16,371 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 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 21:24:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:16,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:16,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438556003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:16,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:16,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:16,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302605548] [2021-06-05 21:24:16,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:16,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:16,435 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:16,505 INFO L93 Difference]: Finished difference Result 157 states and 418 transitions. [2021-06-05 21:24:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:24:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:16,507 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:24:16,507 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:24:16,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:24:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2021-06-05 21:24:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7804878048780486) internal successors, (342), 123 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 342 transitions. [2021-06-05 21:24:16,512 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 342 transitions. Word has length 15 [2021-06-05 21:24:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:16,513 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 342 transitions. [2021-06-05 21:24:16,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 342 transitions. [2021-06-05 21:24:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:16,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:16,513 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:16,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:16,729 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -381017597, now seen corresponding path program 26 times [2021-06-05 21:24:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116970546] [2021-06-05 21:24:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:16,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:16,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116970546] [2021-06-05 21:24:16,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116970546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:16,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369594679] [2021-06-05 21:24:16,770 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 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 21:24:16,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:16,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:16,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:16,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369594679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:16,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:16,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:16,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285446267] [2021-06-05 21:24:16,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:16,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:16,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:16,858 INFO L87 Difference]: Start difference. First operand 124 states and 342 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:16,962 INFO L93 Difference]: Finished difference Result 208 states and 481 transitions. [2021-06-05 21:24:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:24:16,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:16,970 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:24:16,970 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:24:16,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:24:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2021-06-05 21:24:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-06-05 21:24:16,974 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 15 [2021-06-05 21:24:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:16,975 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-06-05 21:24:16,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-06-05 21:24:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:16,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:16,976 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:17,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 21:24:17,189 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash 837368888, now seen corresponding path program 27 times [2021-06-05 21:24:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:17,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294213627] [2021-06-05 21:24:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:17,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294213627] [2021-06-05 21:24:17,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294213627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591387414] [2021-06-05 21:24:17,232 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 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 21:24:17,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:24:17,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591387414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:17,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:17,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:17,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099619805] [2021-06-05 21:24:17,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:17,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:17,293 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:17,332 INFO L93 Difference]: Finished difference Result 216 states and 502 transitions. [2021-06-05 21:24:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:24:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:17,334 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:24:17,334 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:24:17,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:24:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 139. [2021-06-05 21:24:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-06-05 21:24:17,339 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 15 [2021-06-05 21:24:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:17,339 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-06-05 21:24:17,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-06-05 21:24:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:17,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:17,339 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:17,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:17,553 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1920659021, now seen corresponding path program 28 times [2021-06-05 21:24:17,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:17,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251884468] [2021-06-05 21:24:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:17,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:17,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251884468] [2021-06-05 21:24:17,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251884468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:17,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988925686] [2021-06-05 21:24:17,588 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 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 21:24:17,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:17,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:17,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:17,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988925686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:17,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:17,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:17,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622597777] [2021-06-05 21:24:17,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:17,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:17,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:17,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:17,650 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:17,728 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2021-06-05 21:24:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:17,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:17,732 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:24:17,732 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:24:17,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:24:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2021-06-05 21:24:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9166666666666665) internal successors, (455), 156 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 455 transitions. [2021-06-05 21:24:17,738 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 455 transitions. Word has length 15 [2021-06-05 21:24:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:17,738 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 455 transitions. [2021-06-05 21:24:17,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 455 transitions. [2021-06-05 21:24:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:17,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:17,739 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:17,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 21:24:17,953 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:17,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:17,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1717506098, now seen corresponding path program 29 times [2021-06-05 21:24:17,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:17,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728925883] [2021-06-05 21:24:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:17,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728925883] [2021-06-05 21:24:17,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728925883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761984525] [2021-06-05 21:24:17,995 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 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 21:24:18,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:24:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:18,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761984525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:18,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:18,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:18,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809159224] [2021-06-05 21:24:18,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:18,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:18,059 INFO L87 Difference]: Start difference. First operand 157 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:18,153 INFO L93 Difference]: Finished difference Result 232 states and 558 transitions. [2021-06-05 21:24:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:18,154 INFO L225 Difference]: With dead ends: 232 [2021-06-05 21:24:18,154 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 21:24:18,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 21:24:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 157. [2021-06-05 21:24:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9038461538461537) internal successors, (453), 156 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2021-06-05 21:24:18,159 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 15 [2021-06-05 21:24:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:18,160 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2021-06-05 21:24:18,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2021-06-05 21:24:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:18,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:18,160 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:18,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:18,361 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash -795087365, now seen corresponding path program 30 times [2021-06-05 21:24:18,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:18,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689566712] [2021-06-05 21:24:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:18,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689566712] [2021-06-05 21:24:18,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689566712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569886480] [2021-06-05 21:24:18,404 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 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 21:24:18,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:24:18,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:18,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:18,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569886480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:18,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:18,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:18,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262288242] [2021-06-05 21:24:18,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:18,474 INFO L87 Difference]: Start difference. First operand 157 states and 453 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:18,511 INFO L93 Difference]: Finished difference Result 220 states and 530 transitions. [2021-06-05 21:24:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:24:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:18,514 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:24:18,514 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:24:18,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:24:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2021-06-05 21:24:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8967741935483873) internal successors, (449), 155 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 449 transitions. [2021-06-05 21:24:18,519 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 449 transitions. Word has length 15 [2021-06-05 21:24:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:18,519 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 449 transitions. [2021-06-05 21:24:18,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 449 transitions. [2021-06-05 21:24:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:18,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:18,520 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:18,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:18,744 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:18,744 INFO L82 PathProgramCache]: Analyzing trace with hash -6892790, now seen corresponding path program 31 times [2021-06-05 21:24:18,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:18,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212770374] [2021-06-05 21:24:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:18,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212770374] [2021-06-05 21:24:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212770374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173298038] [2021-06-05 21:24:18,777 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 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 21:24:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:18,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:18,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173298038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:18,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:18,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:18,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091942395] [2021-06-05 21:24:18,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:18,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:18,858 INFO L87 Difference]: Start difference. First operand 156 states and 449 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:18,962 INFO L93 Difference]: Finished difference Result 236 states and 559 transitions. [2021-06-05 21:24:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:24:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:18,963 INFO L225 Difference]: With dead ends: 236 [2021-06-05 21:24:18,963 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:24:18,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:24:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 156. [2021-06-05 21:24:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-06-05 21:24:18,968 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-06-05 21:24:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:18,968 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-06-05 21:24:18,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-06-05 21:24:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:18,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:18,968 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:19,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 21:24:19,185 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1770832597, now seen corresponding path program 32 times [2021-06-05 21:24:19,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:19,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091390041] [2021-06-05 21:24:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:19,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091390041] [2021-06-05 21:24:19,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091390041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942658933] [2021-06-05 21:24:19,223 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 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 21:24:19,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:19,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:19,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:19,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942658933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:19,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:19,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:19,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653851755] [2021-06-05 21:24:19,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:19,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:19,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:19,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:19,294 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:19,372 INFO L93 Difference]: Finished difference Result 225 states and 538 transitions. [2021-06-05 21:24:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:24:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:19,374 INFO L225 Difference]: With dead ends: 225 [2021-06-05 21:24:19,374 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 21:24:19,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:24:19,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 21:24:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 156. [2021-06-05 21:24:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-06-05 21:24:19,378 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-06-05 21:24:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:19,378 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-06-05 21:24:19,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-06-05 21:24:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:19,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:19,378 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:19,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:19,602 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1482512206, now seen corresponding path program 33 times [2021-06-05 21:24:19,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:19,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821454560] [2021-06-05 21:24:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:19,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:19,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821454560] [2021-06-05 21:24:19,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821454560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:19,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112969258] [2021-06-05 21:24:19,640 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 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 21:24:19,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:24:19,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:19,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112969258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:19,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:19,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:19,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150095455] [2021-06-05 21:24:19,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:19,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:19,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:19,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:19,706 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:19,779 INFO L93 Difference]: Finished difference Result 210 states and 549 transitions. [2021-06-05 21:24:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:24:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:19,780 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:24:19,780 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:24:19,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:24:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:24:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2021-06-05 21:24:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-06-05 21:24:19,784 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-06-05 21:24:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:19,784 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-06-05 21:24:19,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-06-05 21:24:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:19,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:19,784 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:20,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 21:24:20,001 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:20,001 INFO L82 PathProgramCache]: Analyzing trace with hash -290027205, now seen corresponding path program 34 times [2021-06-05 21:24:20,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:20,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117611175] [2021-06-05 21:24:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:20,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:20,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117611175] [2021-06-05 21:24:20,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117611175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:20,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814204046] [2021-06-05 21:24:20,036 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 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 21:24:20,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:20,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:20,101 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 21:24:20,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814204046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:20,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:20,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:20,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872725795] [2021-06-05 21:24:20,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:20,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:20,103 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:20,178 INFO L93 Difference]: Finished difference Result 201 states and 501 transitions. [2021-06-05 21:24:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:24:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:20,182 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:24:20,182 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 21:24:20,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 21:24:20,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-06-05 21:24:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-06-05 21:24:20,187 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-06-05 21:24:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:20,187 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-06-05 21:24:20,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-06-05 21:24:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:20,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:20,188 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:20,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:20,401 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:20,401 INFO L82 PathProgramCache]: Analyzing trace with hash 409426826, now seen corresponding path program 35 times [2021-06-05 21:24:20,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:20,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945703262] [2021-06-05 21:24:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:20,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:20,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945703262] [2021-06-05 21:24:20,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945703262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:20,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182376235] [2021-06-05 21:24:20,441 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 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 21:24:20,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:24:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:20,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:20,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182376235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:20,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:20,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:20,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046419775] [2021-06-05 21:24:20,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:20,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:20,516 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:20,583 INFO L93 Difference]: Finished difference Result 199 states and 536 transitions. [2021-06-05 21:24:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:24:20,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:20,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:20,584 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:24:20,585 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 21:24:20,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:24:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 21:24:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 156. [2021-06-05 21:24:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8774193548387097) internal successors, (446), 155 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 446 transitions. [2021-06-05 21:24:20,610 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 446 transitions. Word has length 15 [2021-06-05 21:24:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:20,610 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 446 transitions. [2021-06-05 21:24:20,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 446 transitions. [2021-06-05 21:24:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:20,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:20,611 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:20,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 21:24:20,835 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:20,835 INFO L82 PathProgramCache]: Analyzing trace with hash 247828373, now seen corresponding path program 36 times [2021-06-05 21:24:20,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:20,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184885092] [2021-06-05 21:24:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:20,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184885092] [2021-06-05 21:24:20,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184885092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532107091] [2021-06-05 21:24:20,870 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 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 21:24:20,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:24:20,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:20,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532107091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:20,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:20,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:20,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020528564] [2021-06-05 21:24:20,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:20,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:20,949 INFO L87 Difference]: Start difference. First operand 156 states and 446 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:21,061 INFO L93 Difference]: Finished difference Result 212 states and 544 transitions. [2021-06-05 21:24:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:24:21,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 21:24:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:21,071 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:24:21,071 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 21:24:21,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:24:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 21:24:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-06-05 21:24:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.888198757763975) internal successors, (465), 161 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 465 transitions. [2021-06-05 21:24:21,075 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 465 transitions. Word has length 15 [2021-06-05 21:24:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:21,075 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 465 transitions. [2021-06-05 21:24:21,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 465 transitions. [2021-06-05 21:24:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:21,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:21,076 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:21,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 21:24:21,288 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash -636896256, now seen corresponding path program 37 times [2021-06-05 21:24:21,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:21,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711082153] [2021-06-05 21:24:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:21,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711082153] [2021-06-05 21:24:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711082153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542779523] [2021-06-05 21:24:21,323 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 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 21:24:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:21,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:21,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:21,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542779523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:21,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:21,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:21,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144717928] [2021-06-05 21:24:21,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:21,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:21,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:21,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:21,383 INFO L87 Difference]: Start difference. First operand 162 states and 465 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:21,422 INFO L93 Difference]: Finished difference Result 260 states and 622 transitions. [2021-06-05 21:24:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:24:21,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:21,423 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:24:21,423 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 21:24:21,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 21:24:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 168. [2021-06-05 21:24:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9221556886227544) internal successors, (488), 167 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 488 transitions. [2021-06-05 21:24:21,426 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 488 transitions. Word has length 15 [2021-06-05 21:24:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:21,426 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 488 transitions. [2021-06-05 21:24:21,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 488 transitions. [2021-06-05 21:24:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:21,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:21,427 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:21,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:21,633 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash 446393877, now seen corresponding path program 38 times [2021-06-05 21:24:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:21,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266286282] [2021-06-05 21:24:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:21,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:21,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266286282] [2021-06-05 21:24:21,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266286282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:21,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970570523] [2021-06-05 21:24:21,671 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 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 21:24:21,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:21,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:21,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970570523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:21,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:21,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175360956] [2021-06-05 21:24:21,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:21,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:21,738 INFO L87 Difference]: Start difference. First operand 168 states and 488 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:21,828 INFO L93 Difference]: Finished difference Result 258 states and 649 transitions. [2021-06-05 21:24:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:21,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:21,829 INFO L225 Difference]: With dead ends: 258 [2021-06-05 21:24:21,829 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 21:24:21,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 21:24:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 195. [2021-06-05 21:24:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-06-05 21:24:21,834 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 15 [2021-06-05 21:24:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:21,834 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-06-05 21:24:21,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-06-05 21:24:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:21,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:21,835 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:22,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 21:24:22,058 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:22,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1103196054, now seen corresponding path program 39 times [2021-06-05 21:24:22,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:22,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954531599] [2021-06-05 21:24:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:22,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:22,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954531599] [2021-06-05 21:24:22,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954531599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:22,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623109003] [2021-06-05 21:24:22,093 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 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 21:24:22,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:24:22,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:22,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623109003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:22,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:22,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:22,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600640642] [2021-06-05 21:24:22,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:22,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:22,142 INFO L87 Difference]: Start difference. First operand 195 states and 577 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:22,217 INFO L93 Difference]: Finished difference Result 275 states and 689 transitions. [2021-06-05 21:24:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:22,219 INFO L225 Difference]: With dead ends: 275 [2021-06-05 21:24:22,219 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 21:24:22,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 21:24:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2021-06-05 21:24:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-06-05 21:24:22,223 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 15 [2021-06-05 21:24:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:22,223 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-06-05 21:24:22,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-06-05 21:24:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:22,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:22,224 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:22,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:22,437 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2025614787, now seen corresponding path program 40 times [2021-06-05 21:24:22,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:22,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672692663] [2021-06-05 21:24:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:22,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:22,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672692663] [2021-06-05 21:24:22,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672692663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:22,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10292720] [2021-06-05 21:24:22,475 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 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 21:24:22,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:22,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:22,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:22,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10292720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:22,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:22,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:24:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763857909] [2021-06-05 21:24:22,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:24:22,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:22,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:24:22,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:24:22,582 INFO L87 Difference]: Start difference. First operand 195 states and 576 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:22,620 INFO L93 Difference]: Finished difference Result 245 states and 630 transitions. [2021-06-05 21:24:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:24:22,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:22,621 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:24:22,621 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:24:22,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:24:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2021-06-05 21:24:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9533678756476682) internal successors, (570), 193 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 570 transitions. [2021-06-05 21:24:22,626 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 570 transitions. Word has length 15 [2021-06-05 21:24:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:22,626 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 570 transitions. [2021-06-05 21:24:22,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 570 transitions. [2021-06-05 21:24:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:22,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:22,627 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:22,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:22,841 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:22,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1481157934, now seen corresponding path program 41 times [2021-06-05 21:24:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:22,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084375894] [2021-06-05 21:24:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:22,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:22,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084375894] [2021-06-05 21:24:22,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084375894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:22,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37680801] [2021-06-05 21:24:22,872 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 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 21:24:22,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:24:22,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:22,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37680801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:22,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:22,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:22,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048679992] [2021-06-05 21:24:22,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:22,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:22,942 INFO L87 Difference]: Start difference. First operand 194 states and 570 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:23,026 INFO L93 Difference]: Finished difference Result 279 states and 689 transitions. [2021-06-05 21:24:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:24:23,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:23,027 INFO L225 Difference]: With dead ends: 279 [2021-06-05 21:24:23,027 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 21:24:23,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 21:24:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 194. [2021-06-05 21:24:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.948186528497409) internal successors, (569), 193 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 569 transitions. [2021-06-05 21:24:23,050 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 569 transitions. Word has length 15 [2021-06-05 21:24:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:23,050 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 569 transitions. [2021-06-05 21:24:23,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 569 transitions. [2021-06-05 21:24:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:23,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:23,051 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:23,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:23,273 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash 296567453, now seen corresponding path program 42 times [2021-06-05 21:24:23,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:23,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945227472] [2021-06-05 21:24:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:23,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:23,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945227472] [2021-06-05 21:24:23,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945227472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:23,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553001943] [2021-06-05 21:24:23,311 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 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 21:24:23,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:24:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:23,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553001943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:23,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:23,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:23,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443540842] [2021-06-05 21:24:23,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:23,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:23,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:23,381 INFO L87 Difference]: Start difference. First operand 194 states and 569 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:23,450 INFO L93 Difference]: Finished difference Result 248 states and 633 transitions. [2021-06-05 21:24:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:24:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:23,451 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:24:23,451 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 21:24:23,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:24:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 21:24:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2021-06-05 21:24:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9424083769633507) internal successors, (562), 191 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-06-05 21:24:23,456 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 15 [2021-06-05 21:24:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:23,456 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-06-05 21:24:23,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-06-05 21:24:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:23,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:23,457 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:23,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:23,669 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash 8247062, now seen corresponding path program 43 times [2021-06-05 21:24:23,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:23,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186374810] [2021-06-05 21:24:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:23,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:23,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186374810] [2021-06-05 21:24:23,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186374810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:23,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222945259] [2021-06-05 21:24:23,704 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 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 21:24:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:23,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:23,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:23,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222945259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:23,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:23,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:23,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119670510] [2021-06-05 21:24:23,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:23,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:23,759 INFO L87 Difference]: Start difference. First operand 192 states and 562 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:23,842 INFO L93 Difference]: Finished difference Result 252 states and 674 transitions. [2021-06-05 21:24:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:24:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:23,843 INFO L225 Difference]: With dead ends: 252 [2021-06-05 21:24:23,843 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 21:24:23,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 21:24:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2021-06-05 21:24:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.93717277486911) internal successors, (561), 191 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 561 transitions. [2021-06-05 21:24:23,847 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 561 transitions. Word has length 15 [2021-06-05 21:24:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:23,848 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 561 transitions. [2021-06-05 21:24:23,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 561 transitions. [2021-06-05 21:24:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:23,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:23,848 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:24,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 21:24:24,071 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1764292349, now seen corresponding path program 44 times [2021-06-05 21:24:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868533058] [2021-06-05 21:24:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:24,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868533058] [2021-06-05 21:24:24,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868533058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004421167] [2021-06-05 21:24:24,104 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 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 21:24:24,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004421167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:24,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:24,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667669044] [2021-06-05 21:24:24,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:24,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:24,165 INFO L87 Difference]: Start difference. First operand 192 states and 561 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:24,228 INFO L93 Difference]: Finished difference Result 226 states and 602 transitions. [2021-06-05 21:24:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:24:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:24,229 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:24:24,229 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:24:24,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:24:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2021-06-05 21:24:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-06-05 21:24:24,233 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 15 [2021-06-05 21:24:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:24,233 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-06-05 21:24:24,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-06-05 21:24:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:24,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:24,234 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:24,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:24,449 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1064838318, now seen corresponding path program 45 times [2021-06-05 21:24:24,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:24,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644367851] [2021-06-05 21:24:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:24,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644367851] [2021-06-05 21:24:24,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644367851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624764964] [2021-06-05 21:24:24,481 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 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 21:24:24,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:24:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624764964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:24,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:24,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065404071] [2021-06-05 21:24:24,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:24,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:24,537 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:24,611 INFO L93 Difference]: Finished difference Result 241 states and 654 transitions. [2021-06-05 21:24:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:24:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:24,612 INFO L225 Difference]: With dead ends: 241 [2021-06-05 21:24:24,612 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 21:24:24,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 21:24:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 189. [2021-06-05 21:24:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-06-05 21:24:24,616 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-06-05 21:24:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:24,616 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-06-05 21:24:24,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-06-05 21:24:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:24,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:24,617 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:24,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 21:24:24,833 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1226436771, now seen corresponding path program 46 times [2021-06-05 21:24:24,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:24,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027412224] [2021-06-05 21:24:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027412224] [2021-06-05 21:24:24,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027412224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990150818] [2021-06-05 21:24:24,872 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 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 21:24:24,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:24,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:24,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990150818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:24,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:24,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953741936] [2021-06-05 21:24:24,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:24,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:24,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:24,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:24,951 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:25,043 INFO L93 Difference]: Finished difference Result 216 states and 593 transitions. [2021-06-05 21:24:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:24:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:25,047 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:24:25,047 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:24:25,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:24:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:24:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2021-06-05 21:24:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-06-05 21:24:25,051 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-06-05 21:24:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:25,051 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-06-05 21:24:25,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-06-05 21:24:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:25,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:25,052 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:25,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:25,269 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash 29253270, now seen corresponding path program 47 times [2021-06-05 21:24:25,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:25,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692470573] [2021-06-05 21:24:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:25,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692470573] [2021-06-05 21:24:25,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692470573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841976428] [2021-06-05 21:24:25,309 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 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 21:24:25,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:24:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:25,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841976428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:25,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:25,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:25,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586554883] [2021-06-05 21:24:25,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:25,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:25,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:25,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:25,384 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:25,473 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-06-05 21:24:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:24:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:25,475 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:24:25,475 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 21:24:25,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 21:24:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 188. [2021-06-05 21:24:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.93048128342246) internal successors, (548), 187 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 548 transitions. [2021-06-05 21:24:25,480 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 548 transitions. Word has length 15 [2021-06-05 21:24:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:25,480 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 548 transitions. [2021-06-05 21:24:25,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 548 transitions. [2021-06-05 21:24:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:24:25,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:25,481 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:25,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 21:24:25,705 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1732783037, now seen corresponding path program 48 times [2021-06-05 21:24:25,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:25,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46808328] [2021-06-05 21:24:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:25,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:25,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46808328] [2021-06-05 21:24:25,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46808328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:25,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935091602] [2021-06-05 21:24:25,749 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 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 21:24:25,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:24:25,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:24:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:25,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935091602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:25,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:25,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:24:25,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486245003] [2021-06-05 21:24:25,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:24:25,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:24:25,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:24:25,814 INFO L87 Difference]: Start difference. First operand 188 states and 548 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:25,914 INFO L93 Difference]: Finished difference Result 251 states and 681 transitions. [2021-06-05 21:24:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:24:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:24:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:25,915 INFO L225 Difference]: With dead ends: 251 [2021-06-05 21:24:25,915 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 21:24:25,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:24:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 21:24:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-06-05 21:24:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.923076923076923) internal successors, (570), 195 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 570 transitions. [2021-06-05 21:24:25,919 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 570 transitions. Word has length 15 [2021-06-05 21:24:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:25,919 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 570 transitions. [2021-06-05 21:24:25,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 570 transitions. [2021-06-05 21:24:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:24:25,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:25,920 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:26,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 21:24:26,137 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:26,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1137660823, now seen corresponding path program 49 times [2021-06-05 21:24:26,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:26,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553158914] [2021-06-05 21:24:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:24:26,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:26,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553158914] [2021-06-05 21:24:26,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553158914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:26,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737884670] [2021-06-05 21:24:26,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:24:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:26,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:24:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:24:26,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737884670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:26,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:26,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:24:26,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870847714] [2021-06-05 21:24:26,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:24:26,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:24:26,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:26,285 INFO L87 Difference]: Start difference. First operand 196 states and 570 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:26,331 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2021-06-05 21:24:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:24:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:24:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:26,333 INFO L225 Difference]: With dead ends: 378 [2021-06-05 21:24:26,333 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 21:24:26,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 21:24:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 234. [2021-06-05 21:24:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8583690987124464) internal successors, (666), 233 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 666 transitions. [2021-06-05 21:24:26,348 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 666 transitions. Word has length 16 [2021-06-05 21:24:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:26,348 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 666 transitions. [2021-06-05 21:24:26,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 666 transitions. [2021-06-05 21:24:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:24:26,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:26,349 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:26,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 21:24:26,565 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1759521079, now seen corresponding path program 50 times [2021-06-05 21:24:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:26,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507016546] [2021-06-05 21:24:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:24:26,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507016546] [2021-06-05 21:24:26,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507016546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090630794] [2021-06-05 21:24:26,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:24:26,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:26,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:24:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:24:26,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090630794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:26,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:26,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:24:26,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331507027] [2021-06-05 21:24:26,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:24:26,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:26,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:24:26,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:24:26,720 INFO L87 Difference]: Start difference. First operand 234 states and 666 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:26,787 INFO L93 Difference]: Finished difference Result 439 states and 1228 transitions. [2021-06-05 21:24:26,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:24:26,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 21:24:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:26,789 INFO L225 Difference]: With dead ends: 439 [2021-06-05 21:24:26,789 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 21:24:26,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:24:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 21:24:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 282. [2021-06-05 21:24:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8362989323843415) internal successors, (797), 281 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:26,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 797 transitions. [2021-06-05 21:24:26,794 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 797 transitions. Word has length 17 [2021-06-05 21:24:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:26,794 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 797 transitions. [2021-06-05 21:24:26,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 797 transitions. [2021-06-05 21:24:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:24:26,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:26,795 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:27,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 21:24:27,013 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:27,013 INFO L82 PathProgramCache]: Analyzing trace with hash -437647465, now seen corresponding path program 51 times [2021-06-05 21:24:27,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:27,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556669065] [2021-06-05 21:24:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:24:27,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:27,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556669065] [2021-06-05 21:24:27,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556669065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:27,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680879617] [2021-06-05 21:24:27,112 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 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 21:24:27,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:24:27,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:27,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:24:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:24:27,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680879617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:27,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:27,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:24:27,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213315029] [2021-06-05 21:24:27,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:24:27,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:24:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:24:27,240 INFO L87 Difference]: Start difference. First operand 282 states and 797 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:27,351 INFO L93 Difference]: Finished difference Result 508 states and 1418 transitions. [2021-06-05 21:24:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:24:27,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:24:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:27,353 INFO L225 Difference]: With dead ends: 508 [2021-06-05 21:24:27,353 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 21:24:27,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:24:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 21:24:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 340. [2021-06-05 21:24:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.8348082595870205) internal successors, (961), 339 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 961 transitions. [2021-06-05 21:24:27,359 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 961 transitions. Word has length 18 [2021-06-05 21:24:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:27,359 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 961 transitions. [2021-06-05 21:24:27,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 961 transitions. [2021-06-05 21:24:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:27,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:27,360 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:27,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 21:24:27,569 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 169604407, now seen corresponding path program 52 times [2021-06-05 21:24:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849838172] [2021-06-05 21:24:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:27,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849838172] [2021-06-05 21:24:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849838172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803654687] [2021-06-05 21:24:27,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:24:27,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:27,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:27,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:29,031 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 145 [2021-06-05 21:24:29,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:29,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:29,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:29,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:29,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803654687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:29,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:29,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:29,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147550173] [2021-06-05 21:24:29,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:29,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:29,709 INFO L87 Difference]: Start difference. First operand 340 states and 961 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 21:24:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:29,933 INFO L93 Difference]: Finished difference Result 489 states and 1247 transitions. [2021-06-05 21:24:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 19 [2021-06-05 21:24:29,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:29,935 INFO L225 Difference]: With dead ends: 489 [2021-06-05 21:24:29,936 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 21:24:29,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 21:24:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 387. [2021-06-05 21:24:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.8626943005181347) internal successors, (1105), 386 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1105 transitions. [2021-06-05 21:24:29,943 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1105 transitions. Word has length 19 [2021-06-05 21:24:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:29,943 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1105 transitions. [2021-06-05 21:24:29,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 21:24:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1105 transitions. [2021-06-05 21:24:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:29,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:29,944 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:30,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 21:24:30,171 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1764941355, now seen corresponding path program 53 times [2021-06-05 21:24:30,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:30,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102730130] [2021-06-05 21:24:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:30,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:30,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102730130] [2021-06-05 21:24:30,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102730130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:30,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152475656] [2021-06-05 21:24:30,235 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 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 21:24:30,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:24:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:30,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:30,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:30,990 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 203 [2021-06-05 21:24:31,968 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 209 [2021-06-05 21:24:32,115 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 221 [2021-06-05 21:24:32,266 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 236 [2021-06-05 21:24:33,156 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 310 [2021-06-05 21:24:33,378 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 310 [2021-06-05 21:24:33,689 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 315 [2021-06-05 21:24:33,876 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 349 [2021-06-05 21:24:34,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:34,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:34,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:34,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:34,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152475656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:34,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:34,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:34,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438970622] [2021-06-05 21:24:34,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:34,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:34,571 INFO L87 Difference]: Start difference. First operand 387 states and 1105 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:34,771 INFO L93 Difference]: Finished difference Result 556 states and 1456 transitions. [2021-06-05 21:24:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:34,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:24:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:34,774 INFO L225 Difference]: With dead ends: 556 [2021-06-05 21:24:34,774 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 21:24:34,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 21:24:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 432. [2021-06-05 21:24:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.9419953596287702) internal successors, (1268), 431 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1268 transitions. [2021-06-05 21:24:34,782 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1268 transitions. Word has length 19 [2021-06-05 21:24:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:34,783 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1268 transitions. [2021-06-05 21:24:34,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1268 transitions. [2021-06-05 21:24:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:34,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:34,784 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:35,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:35,005 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1606108669, now seen corresponding path program 54 times [2021-06-05 21:24:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:35,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68482822] [2021-06-05 21:24:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:35,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:35,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68482822] [2021-06-05 21:24:35,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68482822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:35,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983017134] [2021-06-05 21:24:35,083 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 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 21:24:35,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:24:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:35,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:36,417 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 363 [2021-06-05 21:24:36,554 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 363 [2021-06-05 21:24:36,726 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 374 [2021-06-05 21:24:37,453 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 181 [2021-06-05 21:24:38,301 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 320 [2021-06-05 21:24:38,547 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 372 [2021-06-05 21:24:38,790 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 372 [2021-06-05 21:24:39,056 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 379 [2021-06-05 21:24:39,414 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 432 [2021-06-05 21:24:39,764 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 187 [2021-06-05 21:24:40,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:40,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:40,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:40,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:40,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983017134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:40,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:40,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696634400] [2021-06-05 21:24:40,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:40,400 INFO L87 Difference]: Start difference. First operand 432 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:40,566 INFO L93 Difference]: Finished difference Result 627 states and 1702 transitions. [2021-06-05 21:24:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:24:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:40,569 INFO L225 Difference]: With dead ends: 627 [2021-06-05 21:24:40,569 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 21:24:40,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 21:24:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 493. [2021-06-05 21:24:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.042682926829268) internal successors, (1497), 492 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1497 transitions. [2021-06-05 21:24:40,577 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1497 transitions. Word has length 19 [2021-06-05 21:24:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:40,577 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1497 transitions. [2021-06-05 21:24:40,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1497 transitions. [2021-06-05 21:24:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:40,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:40,578 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:40,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:40,793 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:40,793 INFO L82 PathProgramCache]: Analyzing trace with hash -977262699, now seen corresponding path program 55 times [2021-06-05 21:24:40,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:40,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628853684] [2021-06-05 21:24:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:40,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:40,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628853684] [2021-06-05 21:24:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628853684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:40,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126110861] [2021-06-05 21:24:40,856 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 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 21:24:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:41,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:41,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:42,191 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 248 [2021-06-05 21:24:42,332 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 267 [2021-06-05 21:24:42,535 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 272 [2021-06-05 21:24:42,647 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 270 [2021-06-05 21:24:43,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:43,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:43,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:43,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:43,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126110861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:43,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:43,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:43,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774101734] [2021-06-05 21:24:43,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:43,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:43,401 INFO L87 Difference]: Start difference. First operand 493 states and 1497 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:43,656 INFO L93 Difference]: Finished difference Result 708 states and 2005 transitions. [2021-06-05 21:24:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:24:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:43,659 INFO L225 Difference]: With dead ends: 708 [2021-06-05 21:24:43,659 INFO L226 Difference]: Without dead ends: 705 [2021-06-05 21:24:43,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-05 21:24:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 574. [2021-06-05 21:24:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.1448516579406633) internal successors, (1802), 573 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1802 transitions. [2021-06-05 21:24:43,671 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1802 transitions. Word has length 19 [2021-06-05 21:24:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:43,671 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1802 transitions. [2021-06-05 21:24:43,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1802 transitions. [2021-06-05 21:24:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:43,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:43,673 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:43,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-06-05 21:24:43,895 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1337093187, now seen corresponding path program 56 times [2021-06-05 21:24:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:43,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651309338] [2021-06-05 21:24:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:24:43,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:43,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651309338] [2021-06-05 21:24:43,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651309338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:43,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350305215] [2021-06-05 21:24:43,954 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 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 21:24:43,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:44,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:44,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:45,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:45,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:45,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:45,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:45,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350305215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:45,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:45,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580104412] [2021-06-05 21:24:45,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:45,441 INFO L87 Difference]: Start difference. First operand 574 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:45,636 INFO L93 Difference]: Finished difference Result 810 states and 2379 transitions. [2021-06-05 21:24:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:24:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:45,640 INFO L225 Difference]: With dead ends: 810 [2021-06-05 21:24:45,640 INFO L226 Difference]: Without dead ends: 807 [2021-06-05 21:24:45,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-06-05 21:24:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 673. [2021-06-05 21:24:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.232142857142857) internal successors, (2172), 672 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2172 transitions. [2021-06-05 21:24:45,653 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2172 transitions. Word has length 19 [2021-06-05 21:24:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:45,653 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2172 transitions. [2021-06-05 21:24:45,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2172 transitions. [2021-06-05 21:24:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:45,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:45,654 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:45,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:45,872 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash 67681621, now seen corresponding path program 57 times [2021-06-05 21:24:45,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:45,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814566903] [2021-06-05 21:24:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:45,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:45,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814566903] [2021-06-05 21:24:45,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814566903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:45,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471767760] [2021-06-05 21:24:45,933 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 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 21:24:45,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:24:45,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:46,251 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 21:24:46,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:46,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:46,862 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 291 [2021-06-05 21:24:46,975 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 291 [2021-06-05 21:24:47,115 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 298 [2021-06-05 21:24:47,987 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 255 [2021-06-05 21:24:48,092 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 255 [2021-06-05 21:24:48,224 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 263 [2021-06-05 21:24:48,407 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 210 [2021-06-05 21:24:48,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:48,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:48,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:48,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:48,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471767760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:48,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:48,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524552752] [2021-06-05 21:24:48,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:48,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:48,964 INFO L87 Difference]: Start difference. First operand 673 states and 2172 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:49,154 INFO L93 Difference]: Finished difference Result 900 states and 2698 transitions. [2021-06-05 21:24:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:24:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:49,157 INFO L225 Difference]: With dead ends: 900 [2021-06-05 21:24:49,157 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 21:24:49,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 21:24:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 767. [2021-06-05 21:24:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.27023498694517) internal successors, (2505), 766 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2505 transitions. [2021-06-05 21:24:49,170 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2505 transitions. Word has length 19 [2021-06-05 21:24:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:49,170 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2505 transitions. [2021-06-05 21:24:49,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2505 transitions. [2021-06-05 21:24:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:49,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:49,171 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:49,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1509 [2021-06-05 21:24:49,385 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash -629371261, now seen corresponding path program 58 times [2021-06-05 21:24:49,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:49,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684274867] [2021-06-05 21:24:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:49,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:49,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684274867] [2021-06-05 21:24:49,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684274867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752410966] [2021-06-05 21:24:49,444 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 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 21:24:49,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:49,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:49,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:49,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:49,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:49,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:51,134 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-06-05 21:24:51,383 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 455 [2021-06-05 21:24:51,641 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 455 [2021-06-05 21:24:51,919 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 460 [2021-06-05 21:24:52,037 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 256 [2021-06-05 21:24:52,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:52,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:52,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:52,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:52,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752410966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:52,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:52,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441315126] [2021-06-05 21:24:52,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:52,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:52,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:52,525 INFO L87 Difference]: Start difference. First operand 767 states and 2505 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:52,763 INFO L93 Difference]: Finished difference Result 993 states and 3021 transitions. [2021-06-05 21:24:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:52,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:24:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:52,768 INFO L225 Difference]: With dead ends: 993 [2021-06-05 21:24:52,768 INFO L226 Difference]: Without dead ends: 990 [2021-06-05 21:24:52,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-06-05 21:24:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 859. [2021-06-05 21:24:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.297202797202797) internal successors, (2829), 858 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2829 transitions. [2021-06-05 21:24:52,785 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2829 transitions. Word has length 19 [2021-06-05 21:24:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:52,785 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2829 transitions. [2021-06-05 21:24:52,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2829 transitions. [2021-06-05 21:24:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:52,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:52,787 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:53,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1805,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:53,001 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -763174123, now seen corresponding path program 59 times [2021-06-05 21:24:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045898152] [2021-06-05 21:24:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:53,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:53,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045898152] [2021-06-05 21:24:53,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045898152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:53,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37514509] [2021-06-05 21:24:53,065 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 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 21:24:53,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:24:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:53,395 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 21:24:53,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:53,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:54,897 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 250 [2021-06-05 21:24:55,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:55,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:55,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:55,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:24:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:55,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37514509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:55,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:55,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:24:55,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968441747] [2021-06-05 21:24:55,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:55,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:55,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:55,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:55,126 INFO L87 Difference]: Start difference. First operand 859 states and 2829 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:55,326 INFO L93 Difference]: Finished difference Result 1089 states and 3338 transitions. [2021-06-05 21:24:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:24:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:24:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:55,330 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 21:24:55,330 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 21:24:55,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 21:24:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 952. [2021-06-05 21:24:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.3070452155625656) internal successors, (3145), 951 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3145 transitions. [2021-06-05 21:24:55,345 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3145 transitions. Word has length 19 [2021-06-05 21:24:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:55,346 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3145 transitions. [2021-06-05 21:24:55,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3145 transitions. [2021-06-05 21:24:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:24:55,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:55,348 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:55,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-06-05 21:24:55,571 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash -616095549, now seen corresponding path program 60 times [2021-06-05 21:24:55,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:55,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051241292] [2021-06-05 21:24:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:55,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:55,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051241292] [2021-06-05 21:24:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051241292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:55,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307581071] [2021-06-05 21:24:55,623 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 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 21:24:55,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:24:55,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:24:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:55,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:55,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:24:56,505 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 348 [2021-06-05 21:24:57,056 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 507 [2021-06-05 21:24:57,284 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 507 [2021-06-05 21:24:57,562 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 518 [2021-06-05 21:24:58,460 WARN L205 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 701 [2021-06-05 21:24:59,189 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 513 [2021-06-05 21:24:59,784 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 264 [2021-06-05 21:25:00,680 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 280 [2021-06-05 21:25:00,845 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 335 [2021-06-05 21:25:01,157 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 347 [2021-06-05 21:25:01,455 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 347 [2021-06-05 21:25:01,787 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 998 DAG size of output: 352 [2021-06-05 21:25:02,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:02,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:02,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:02,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:25:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:02,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307581071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:02,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:02,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 21:25:02,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458249611] [2021-06-05 21:25:02,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:25:02,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:25:02,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:02,308 INFO L87 Difference]: Start difference. First operand 952 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:02,519 INFO L93 Difference]: Finished difference Result 1152 states and 3567 transitions. [2021-06-05 21:25:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:25:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:25:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:02,524 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 21:25:02,524 INFO L226 Difference]: Without dead ends: 1149 [2021-06-05 21:25:02,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-06-05 21:25:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1030. [2021-06-05 21:25:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.308066083576288) internal successors, (3404), 1029 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3404 transitions. [2021-06-05 21:25:02,542 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3404 transitions. Word has length 19 [2021-06-05 21:25:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:02,542 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3404 transitions. [2021-06-05 21:25:02,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3404 transitions. [2021-06-05 21:25:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:02,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:02,544 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:02,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:02,764 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:02,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:02,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1814543255, now seen corresponding path program 61 times [2021-06-05 21:25:02,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:02,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505518198] [2021-06-05 21:25:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:02,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505518198] [2021-06-05 21:25:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505518198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721952437] [2021-06-05 21:25:02,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:25:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:02,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721952437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:02,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:02,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507979519] [2021-06-05 21:25:02,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:02,946 INFO L87 Difference]: Start difference. First operand 1030 states and 3404 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:03,114 INFO L93 Difference]: Finished difference Result 1163 states and 3561 transitions. [2021-06-05 21:25:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:03,117 INFO L225 Difference]: With dead ends: 1163 [2021-06-05 21:25:03,118 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 21:25:03,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:25:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 21:25:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1002. [2021-06-05 21:25:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.2927072927072927) internal successors, (3296), 1001 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3296 transitions. [2021-06-05 21:25:03,136 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3296 transitions. Word has length 20 [2021-06-05 21:25:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:03,136 INFO L482 AbstractCegarLoop]: Abstraction has 1002 states and 3296 transitions. [2021-06-05 21:25:03,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3296 transitions. [2021-06-05 21:25:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:03,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:03,138 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:03,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3016,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:03,353 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash 963496790, now seen corresponding path program 62 times [2021-06-05 21:25:03,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:03,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254757487] [2021-06-05 21:25:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:03,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:03,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254757487] [2021-06-05 21:25:03,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254757487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:03,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525516835] [2021-06-05 21:25:03,422 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 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 21:25:03,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:03,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:03,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525516835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:03,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:03,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:03,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419325724] [2021-06-05 21:25:03,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:03,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:03,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:03,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:03,483 INFO L87 Difference]: Start difference. First operand 1002 states and 3296 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:03,739 INFO L93 Difference]: Finished difference Result 1245 states and 3687 transitions. [2021-06-05 21:25:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:25:03,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:03,741 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 21:25:03,741 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 21:25:03,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:25:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 21:25:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1029. [2021-06-05 21:25:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.277237354085603) internal successors, (3369), 1028 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3369 transitions. [2021-06-05 21:25:03,760 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3369 transitions. Word has length 20 [2021-06-05 21:25:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:03,760 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 3369 transitions. [2021-06-05 21:25:03,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3369 transitions. [2021-06-05 21:25:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:03,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:03,762 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:03,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:03,977 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:03,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1620089803, now seen corresponding path program 63 times [2021-06-05 21:25:03,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:03,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085178389] [2021-06-05 21:25:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:04,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:04,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085178389] [2021-06-05 21:25:04,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085178389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:04,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328045587] [2021-06-05 21:25:04,042 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 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 21:25:04,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:04,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:04,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328045587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:04,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:04,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:04,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675140894] [2021-06-05 21:25:04,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:04,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:04,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:04,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:04,099 INFO L87 Difference]: Start difference. First operand 1029 states and 3369 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:04,216 INFO L93 Difference]: Finished difference Result 1068 states and 3424 transitions. [2021-06-05 21:25:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:04,218 INFO L225 Difference]: With dead ends: 1068 [2021-06-05 21:25:04,218 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 21:25:04,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 21:25:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1029. [2021-06-05 21:25:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.2733463035019454) internal successors, (3365), 1028 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3365 transitions. [2021-06-05 21:25:04,230 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3365 transitions. Word has length 20 [2021-06-05 21:25:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:04,231 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 3365 transitions. [2021-06-05 21:25:04,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3365 transitions. [2021-06-05 21:25:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:04,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:04,232 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:04,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3018,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:04,433 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1752458760, now seen corresponding path program 64 times [2021-06-05 21:25:04,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:04,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029260079] [2021-06-05 21:25:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:04,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:04,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029260079] [2021-06-05 21:25:04,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029260079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:04,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513055566] [2021-06-05 21:25:04,494 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 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 21:25:04,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:04,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:04,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:04,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513055566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:04,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:04,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:04,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886948132] [2021-06-05 21:25:04,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:04,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:04,556 INFO L87 Difference]: Start difference. First operand 1029 states and 3365 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:04,610 INFO L93 Difference]: Finished difference Result 1274 states and 3760 transitions. [2021-06-05 21:25:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:04,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:04,612 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 21:25:04,612 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 21:25:04,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 21:25:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 995. [2021-06-05 21:25:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2575452716297786) internal successors, (3238), 994 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3238 transitions. [2021-06-05 21:25:04,625 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3238 transitions. Word has length 20 [2021-06-05 21:25:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:04,625 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 3238 transitions. [2021-06-05 21:25:04,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3238 transitions. [2021-06-05 21:25:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:04,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:04,627 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:04,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3019 [2021-06-05 21:25:04,827 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash 38830179, now seen corresponding path program 65 times [2021-06-05 21:25:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:04,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255248831] [2021-06-05 21:25:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:04,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:04,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255248831] [2021-06-05 21:25:04,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255248831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:04,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109042117] [2021-06-05 21:25:04,894 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 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 21:25:04,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:04,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:04,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:04,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109042117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:04,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:04,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:04,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202228089] [2021-06-05 21:25:04,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:04,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:04,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:04,985 INFO L87 Difference]: Start difference. First operand 995 states and 3238 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:05,101 INFO L93 Difference]: Finished difference Result 1213 states and 3571 transitions. [2021-06-05 21:25:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:05,104 INFO L225 Difference]: With dead ends: 1213 [2021-06-05 21:25:05,104 INFO L226 Difference]: Without dead ends: 1213 [2021-06-05 21:25:05,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-06-05 21:25:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1013. [2021-06-05 21:25:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2371541501976284) internal successors, (3276), 1012 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3276 transitions. [2021-06-05 21:25:05,131 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3276 transitions. Word has length 20 [2021-06-05 21:25:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:05,131 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 3276 transitions. [2021-06-05 21:25:05,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3276 transitions. [2021-06-05 21:25:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:05,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:05,133 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:05,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 21:25:05,357 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1122120312, now seen corresponding path program 66 times [2021-06-05 21:25:05,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:05,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829998162] [2021-06-05 21:25:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:05,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:05,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829998162] [2021-06-05 21:25:05,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829998162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129805638] [2021-06-05 21:25:05,420 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 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 21:25:05,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:05,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:05,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:05,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129805638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:05,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:05,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071342488] [2021-06-05 21:25:05,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:05,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:05,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:05,479 INFO L87 Difference]: Start difference. First operand 1013 states and 3276 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:05,621 INFO L93 Difference]: Finished difference Result 1229 states and 3602 transitions. [2021-06-05 21:25:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:05,623 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 21:25:05,624 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 21:25:05,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 21:25:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1023. [2021-06-05 21:25:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.238747553816047) internal successors, (3310), 1022 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3310 transitions. [2021-06-05 21:25:05,639 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3310 transitions. Word has length 20 [2021-06-05 21:25:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:05,639 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3310 transitions. [2021-06-05 21:25:05,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3310 transitions. [2021-06-05 21:25:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:05,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:05,641 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:05,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3021,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:05,865 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:05,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1778922489, now seen corresponding path program 67 times [2021-06-05 21:25:05,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:05,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323895656] [2021-06-05 21:25:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:05,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:05,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323895656] [2021-06-05 21:25:05,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323895656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:05,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339988534] [2021-06-05 21:25:05,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:25:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:05,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:05,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339988534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:05,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:05,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:05,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957959220] [2021-06-05 21:25:05,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:05,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:05,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:05,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:06,000 INFO L87 Difference]: Start difference. First operand 1023 states and 3310 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:06,158 INFO L93 Difference]: Finished difference Result 1156 states and 3491 transitions. [2021-06-05 21:25:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:06,162 INFO L225 Difference]: With dead ends: 1156 [2021-06-05 21:25:06,162 INFO L226 Difference]: Without dead ends: 1154 [2021-06-05 21:25:06,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-05 21:25:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 998. [2021-06-05 21:25:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2367101303911734) internal successors, (3227), 997 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3227 transitions. [2021-06-05 21:25:06,182 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3227 transitions. Word has length 20 [2021-06-05 21:25:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:06,182 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 3227 transitions. [2021-06-05 21:25:06,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3227 transitions. [2021-06-05 21:25:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:06,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:06,184 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:06,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3022 [2021-06-05 21:25:06,407 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1593626074, now seen corresponding path program 68 times [2021-06-05 21:25:06,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:06,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111832520] [2021-06-05 21:25:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:06,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:06,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111832520] [2021-06-05 21:25:06,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111832520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:06,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977714129] [2021-06-05 21:25:06,478 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 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 21:25:06,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:06,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:06,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:06,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977714129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:06,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:06,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:06,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785898690] [2021-06-05 21:25:06,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:06,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:06,555 INFO L87 Difference]: Start difference. First operand 998 states and 3227 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:06,618 INFO L93 Difference]: Finished difference Result 1269 states and 3667 transitions. [2021-06-05 21:25:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:06,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:06,621 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 21:25:06,622 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 21:25:06,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 21:25:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1001. [2021-06-05 21:25:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.236) internal successors, (3236), 1000 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3236 transitions. [2021-06-05 21:25:06,641 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3236 transitions. Word has length 20 [2021-06-05 21:25:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:06,641 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 3236 transitions. [2021-06-05 21:25:06,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3236 transitions. [2021-06-05 21:25:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:06,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:06,643 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:06,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-06-05 21:25:06,861 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:06,861 INFO L82 PathProgramCache]: Analyzing trace with hash -805431499, now seen corresponding path program 69 times [2021-06-05 21:25:06,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:06,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150485136] [2021-06-05 21:25:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:06,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150485136] [2021-06-05 21:25:06,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150485136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958396767] [2021-06-05 21:25:06,923 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 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 21:25:06,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:06,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:06,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:06,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:06,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958396767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:06,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:06,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:06,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979587192] [2021-06-05 21:25:06,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:06,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:06,986 INFO L87 Difference]: Start difference. First operand 1001 states and 3236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:07,154 INFO L93 Difference]: Finished difference Result 1102 states and 3382 transitions. [2021-06-05 21:25:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:07,157 INFO L225 Difference]: With dead ends: 1102 [2021-06-05 21:25:07,157 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 21:25:07,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 21:25:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1001. [2021-06-05 21:25:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.232) internal successors, (3232), 1000 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3232 transitions. [2021-06-05 21:25:07,172 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3232 transitions. Word has length 20 [2021-06-05 21:25:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:07,172 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 3232 transitions. [2021-06-05 21:25:07,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3232 transitions. [2021-06-05 21:25:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:07,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:07,174 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:07,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:07,376 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash 972293888, now seen corresponding path program 70 times [2021-06-05 21:25:07,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:07,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601266219] [2021-06-05 21:25:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:07,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601266219] [2021-06-05 21:25:07,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601266219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:07,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73240025] [2021-06-05 21:25:07,442 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 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 21:25:07,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:07,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73240025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:07,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:07,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:07,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247640116] [2021-06-05 21:25:07,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:07,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:07,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:07,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:07,538 INFO L87 Difference]: Start difference. First operand 1001 states and 3232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:07,619 INFO L93 Difference]: Finished difference Result 1353 states and 3864 transitions. [2021-06-05 21:25:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:07,627 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 21:25:07,627 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 21:25:07,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 21:25:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 965. [2021-06-05 21:25:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.2147302904564317) internal successors, (3099), 964 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3099 transitions. [2021-06-05 21:25:07,646 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3099 transitions. Word has length 20 [2021-06-05 21:25:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:07,646 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 3099 transitions. [2021-06-05 21:25:07,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3099 transitions. [2021-06-05 21:25:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:07,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:07,648 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:07,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:07,869 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:07,869 INFO L82 PathProgramCache]: Analyzing trace with hash 667676149, now seen corresponding path program 71 times [2021-06-05 21:25:07,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:07,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802479481] [2021-06-05 21:25:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:07,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:07,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802479481] [2021-06-05 21:25:07,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802479481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:07,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226953875] [2021-06-05 21:25:07,936 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 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 21:25:07,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:07,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:07,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226953875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:08,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:08,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476998107] [2021-06-05 21:25:08,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:08,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:08,004 INFO L87 Difference]: Start difference. First operand 965 states and 3099 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:08,137 INFO L93 Difference]: Finished difference Result 1173 states and 3407 transitions. [2021-06-05 21:25:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:08,140 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 21:25:08,140 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 21:25:08,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 21:25:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 959. [2021-06-05 21:25:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.1920668058455113) internal successors, (3058), 958 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3058 transitions. [2021-06-05 21:25:08,162 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3058 transitions. Word has length 20 [2021-06-05 21:25:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:08,162 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3058 transitions. [2021-06-05 21:25:08,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3058 transitions. [2021-06-05 21:25:08,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:08,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:08,164 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:08,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:08,388 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1750966282, now seen corresponding path program 72 times [2021-06-05 21:25:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:08,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137983014] [2021-06-05 21:25:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:08,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:08,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137983014] [2021-06-05 21:25:08,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137983014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41510700] [2021-06-05 21:25:08,447 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 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 21:25:08,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:08,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:08,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41510700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:08,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:08,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209232307] [2021-06-05 21:25:08,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:08,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:08,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:08,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:08,513 INFO L87 Difference]: Start difference. First operand 959 states and 3058 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:08,664 INFO L93 Difference]: Finished difference Result 1173 states and 3381 transitions. [2021-06-05 21:25:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:08,667 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 21:25:08,667 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 21:25:08,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 21:25:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 971. [2021-06-05 21:25:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.193814432989691) internal successors, (3098), 970 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3098 transitions. [2021-06-05 21:25:08,688 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3098 transitions. Word has length 20 [2021-06-05 21:25:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 3098 transitions. [2021-06-05 21:25:08,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3098 transitions. [2021-06-05 21:25:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:08,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:08,690 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:08,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:08,905 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1887198837, now seen corresponding path program 73 times [2021-06-05 21:25:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:08,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246982820] [2021-06-05 21:25:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:08,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:08,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246982820] [2021-06-05 21:25:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246982820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759717708] [2021-06-05 21:25:08,968 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 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 21:25:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759717708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:09,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:09,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853939325] [2021-06-05 21:25:09,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:09,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:09,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:09,032 INFO L87 Difference]: Start difference. First operand 971 states and 3098 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:09,189 INFO L93 Difference]: Finished difference Result 1115 states and 3298 transitions. [2021-06-05 21:25:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:09,192 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 21:25:09,192 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 21:25:09,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 21:25:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 965. [2021-06-05 21:25:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.1898340248962658) internal successors, (3075), 964 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3075 transitions. [2021-06-05 21:25:09,213 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3075 transitions. Word has length 20 [2021-06-05 21:25:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:09,213 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 3075 transitions. [2021-06-05 21:25:09,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3075 transitions. [2021-06-05 21:25:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:09,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:09,215 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:09,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:09,440 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:09,440 INFO L82 PathProgramCache]: Analyzing trace with hash -964780104, now seen corresponding path program 74 times [2021-06-05 21:25:09,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:09,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382610188] [2021-06-05 21:25:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:09,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:09,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382610188] [2021-06-05 21:25:09,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382610188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925499445] [2021-06-05 21:25:09,508 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 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 21:25:09,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:09,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925499445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:09,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:09,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758155541] [2021-06-05 21:25:09,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:09,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:09,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:09,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:09,585 INFO L87 Difference]: Start difference. First operand 965 states and 3075 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:09,642 INFO L93 Difference]: Finished difference Result 1233 states and 3507 transitions. [2021-06-05 21:25:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:09,644 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 21:25:09,644 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 21:25:09,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 21:25:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 967. [2021-06-05 21:25:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.18944099378882) internal successors, (3081), 966 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3081 transitions. [2021-06-05 21:25:09,661 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3081 transitions. Word has length 20 [2021-06-05 21:25:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:09,661 INFO L482 AbstractCegarLoop]: Abstraction has 967 states and 3081 transitions. [2021-06-05 21:25:09,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,661 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3081 transitions. [2021-06-05 21:25:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:09,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:09,663 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:09,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:09,887 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash -176585529, now seen corresponding path program 75 times [2021-06-05 21:25:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:09,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032606894] [2021-06-05 21:25:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:09,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:09,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032606894] [2021-06-05 21:25:09,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032606894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408048580] [2021-06-05 21:25:09,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:25:09,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:09,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:10,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408048580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:10,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:10,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:10,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127825061] [2021-06-05 21:25:10,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:10,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:10,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:10,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:10,047 INFO L87 Difference]: Start difference. First operand 967 states and 3081 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:10,206 INFO L93 Difference]: Finished difference Result 1112 states and 3285 transitions. [2021-06-05 21:25:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:10,209 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 21:25:10,209 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 21:25:10,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 21:25:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 967. [2021-06-05 21:25:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.1853002070393375) internal successors, (3077), 966 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3077 transitions. [2021-06-05 21:25:10,226 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3077 transitions. Word has length 20 [2021-06-05 21:25:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:10,226 INFO L482 AbstractCegarLoop]: Abstraction has 967 states and 3077 transitions. [2021-06-05 21:25:10,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3077 transitions. [2021-06-05 21:25:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:10,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:10,228 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3030 [2021-06-05 21:25:10,445 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1601139858, now seen corresponding path program 76 times [2021-06-05 21:25:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071344311] [2021-06-05 21:25:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:10,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071344311] [2021-06-05 21:25:10,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071344311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571190443] [2021-06-05 21:25:10,513 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 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 21:25:10,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:10,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:10,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571190443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:10,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:10,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:10,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30678080] [2021-06-05 21:25:10,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:10,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:10,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:10,583 INFO L87 Difference]: Start difference. First operand 967 states and 3077 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:10,655 INFO L93 Difference]: Finished difference Result 1326 states and 3712 transitions. [2021-06-05 21:25:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:10,657 INFO L225 Difference]: With dead ends: 1326 [2021-06-05 21:25:10,657 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 21:25:10,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 21:25:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 938. [2021-06-05 21:25:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.1643543223052295) internal successors, (2965), 937 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2965 transitions. [2021-06-05 21:25:10,672 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2965 transitions. Word has length 20 [2021-06-05 21:25:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:10,672 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2965 transitions. [2021-06-05 21:25:10,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2965 transitions. [2021-06-05 21:25:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:10,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:10,674 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:10,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3031 [2021-06-05 21:25:10,897 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1312819467, now seen corresponding path program 77 times [2021-06-05 21:25:10,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:10,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950174030] [2021-06-05 21:25:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:10,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:10,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950174030] [2021-06-05 21:25:10,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950174030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:10,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691346190] [2021-06-05 21:25:10,965 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 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 21:25:11,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:11,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:11,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691346190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:11,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:11,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:11,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216643542] [2021-06-05 21:25:11,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:11,047 INFO L87 Difference]: Start difference. First operand 938 states and 2965 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:11,207 INFO L93 Difference]: Finished difference Result 1106 states and 3370 transitions. [2021-06-05 21:25:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:11,209 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 21:25:11,209 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 21:25:11,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 21:25:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 941. [2021-06-05 21:25:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.1638297872340426) internal successors, (2974), 940 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2974 transitions. [2021-06-05 21:25:11,225 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2974 transitions. Word has length 20 [2021-06-05 21:25:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:11,226 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2974 transitions. [2021-06-05 21:25:11,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2974 transitions. [2021-06-05 21:25:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:11,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:11,227 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:11,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-06-05 21:25:11,441 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash -459719944, now seen corresponding path program 78 times [2021-06-05 21:25:11,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:11,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425970537] [2021-06-05 21:25:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:11,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425970537] [2021-06-05 21:25:11,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425970537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032809451] [2021-06-05 21:25:11,510 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 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 21:25:11,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:11,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:11,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032809451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:11,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:11,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:11,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281141887] [2021-06-05 21:25:11,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:11,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:11,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:11,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:11,592 INFO L87 Difference]: Start difference. First operand 941 states and 2974 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:11,694 INFO L93 Difference]: Finished difference Result 1725 states and 5166 transitions. [2021-06-05 21:25:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:11,696 INFO L225 Difference]: With dead ends: 1725 [2021-06-05 21:25:11,696 INFO L226 Difference]: Without dead ends: 1725 [2021-06-05 21:25:11,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-06-05 21:25:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1284. [2021-06-05 21:25:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3265783320342948) internal successors, (4268), 1283 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4268 transitions. [2021-06-05 21:25:11,713 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4268 transitions. Word has length 20 [2021-06-05 21:25:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:11,713 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4268 transitions. [2021-06-05 21:25:11,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4268 transitions. [2021-06-05 21:25:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:11,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:11,715 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:11,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3033,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:11,915 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1312935261, now seen corresponding path program 79 times [2021-06-05 21:25:11,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:11,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639026496] [2021-06-05 21:25:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:11,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:11,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639026496] [2021-06-05 21:25:11,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639026496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:11,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80393418] [2021-06-05 21:25:11,974 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 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 21:25:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:12,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:12,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:12,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80393418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:12,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:12,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241932287] [2021-06-05 21:25:12,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:12,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:12,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:12,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:12,072 INFO L87 Difference]: Start difference. First operand 1284 states and 4268 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:12,160 INFO L93 Difference]: Finished difference Result 1481 states and 4527 transitions. [2021-06-05 21:25:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:12,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:12,161 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 21:25:12,161 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 21:25:12,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 21:25:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1264. [2021-06-05 21:25:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.28978622327791) internal successors, (4155), 1263 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4155 transitions. [2021-06-05 21:25:12,183 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4155 transitions. Word has length 20 [2021-06-05 21:25:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:12,183 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 4155 transitions. [2021-06-05 21:25:12,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4155 transitions. [2021-06-05 21:25:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:12,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:12,185 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:12,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-05 21:25:12,404 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash -229645128, now seen corresponding path program 80 times [2021-06-05 21:25:12,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:12,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879927977] [2021-06-05 21:25:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:12,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:12,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879927977] [2021-06-05 21:25:12,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879927977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353293477] [2021-06-05 21:25:12,462 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 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 21:25:12,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:12,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:12,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353293477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:12,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:12,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742683263] [2021-06-05 21:25:12,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:12,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:12,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:12,517 INFO L87 Difference]: Start difference. First operand 1264 states and 4155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:12,648 INFO L93 Difference]: Finished difference Result 1495 states and 4548 transitions. [2021-06-05 21:25:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:12,650 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 21:25:12,651 INFO L226 Difference]: Without dead ends: 1493 [2021-06-05 21:25:12,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-06-05 21:25:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1297. [2021-06-05 21:25:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.2916666666666665) internal successors, (4266), 1296 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4266 transitions. [2021-06-05 21:25:12,672 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4266 transitions. Word has length 20 [2021-06-05 21:25:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:12,672 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4266 transitions. [2021-06-05 21:25:12,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4266 transitions. [2021-06-05 21:25:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:12,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:12,674 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:12,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:12,897 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 427157049, now seen corresponding path program 81 times [2021-06-05 21:25:12,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:12,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266122254] [2021-06-05 21:25:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:12,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266122254] [2021-06-05 21:25:12,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266122254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520495798] [2021-06-05 21:25:12,949 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 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 21:25:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:25:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520495798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:13,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:13,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 21:25:13,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504375366] [2021-06-05 21:25:13,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:25:13,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:25:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:13,089 INFO L87 Difference]: Start difference. First operand 1297 states and 4266 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:13,993 INFO L93 Difference]: Finished difference Result 2116 states and 6354 transitions. [2021-06-05 21:25:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 21:25:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:13,997 INFO L225 Difference]: With dead ends: 2116 [2021-06-05 21:25:13,997 INFO L226 Difference]: Without dead ends: 2110 [2021-06-05 21:25:13,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=690, Invalid=5316, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 21:25:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-05 21:25:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1671. [2021-06-05 21:25:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.2149700598802395) internal successors, (5369), 1670 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5369 transitions. [2021-06-05 21:25:14,028 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5369 transitions. Word has length 20 [2021-06-05 21:25:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:14,028 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5369 transitions. [2021-06-05 21:25:14,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5369 transitions. [2021-06-05 21:25:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:14,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:14,031 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:14,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:14,254 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1349575782, now seen corresponding path program 82 times [2021-06-05 21:25:14,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:14,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702431095] [2021-06-05 21:25:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:14,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:14,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702431095] [2021-06-05 21:25:14,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702431095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181975676] [2021-06-05 21:25:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:14,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:14,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:14,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:14,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181975676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:14,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:14,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556305161] [2021-06-05 21:25:14,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:14,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:14,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:14,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:14,385 INFO L87 Difference]: Start difference. First operand 1671 states and 5369 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:14,446 INFO L93 Difference]: Finished difference Result 1971 states and 5778 transitions. [2021-06-05 21:25:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:14,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:14,449 INFO L225 Difference]: With dead ends: 1971 [2021-06-05 21:25:14,449 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 21:25:14,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 21:25:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1669. [2021-06-05 21:25:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.2044364508393284) internal successors, (5345), 1668 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5345 transitions. [2021-06-05 21:25:14,477 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5345 transitions. Word has length 20 [2021-06-05 21:25:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:14,477 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5345 transitions. [2021-06-05 21:25:14,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5345 transitions. [2021-06-05 21:25:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:14,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:14,480 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:14,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:14,701 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash -379471552, now seen corresponding path program 83 times [2021-06-05 21:25:14,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:14,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681555730] [2021-06-05 21:25:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:14,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:14,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681555730] [2021-06-05 21:25:14,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681555730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594677963] [2021-06-05 21:25:14,764 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 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 21:25:14,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:14,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594677963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:14,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:14,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:14,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235602652] [2021-06-05 21:25:14,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:14,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:14,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:14,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:14,868 INFO L87 Difference]: Start difference. First operand 1669 states and 5345 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:14,953 INFO L93 Difference]: Finished difference Result 2070 states and 5985 transitions. [2021-06-05 21:25:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:14,956 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 21:25:14,956 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 21:25:14,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 21:25:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1581. [2021-06-05 21:25:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1848101265822786) internal successors, (5032), 1580 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5032 transitions. [2021-06-05 21:25:14,979 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5032 transitions. Word has length 20 [2021-06-05 21:25:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:14,980 INFO L482 AbstractCegarLoop]: Abstraction has 1581 states and 5032 transitions. [2021-06-05 21:25:14,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5032 transitions. [2021-06-05 21:25:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:14,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:14,981 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:15,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3038 [2021-06-05 21:25:15,182 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1854635942, now seen corresponding path program 84 times [2021-06-05 21:25:15,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:15,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003394652] [2021-06-05 21:25:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003394652] [2021-06-05 21:25:15,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003394652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85389068] [2021-06-05 21:25:15,236 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 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 21:25:15,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:25:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85389068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:15,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:15,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365444212] [2021-06-05 21:25:15,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:15,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:15,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:15,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:15,307 INFO L87 Difference]: Start difference. First operand 1581 states and 5032 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:15,389 INFO L93 Difference]: Finished difference Result 2650 states and 8050 transitions. [2021-06-05 21:25:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:15,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:15,393 INFO L225 Difference]: With dead ends: 2650 [2021-06-05 21:25:15,393 INFO L226 Difference]: Without dead ends: 2650 [2021-06-05 21:25:15,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-06-05 21:25:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2152. [2021-06-05 21:25:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3170618317061833) internal successors, (7135), 2151 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7135 transitions. [2021-06-05 21:25:15,424 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7135 transitions. Word has length 20 [2021-06-05 21:25:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:15,424 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7135 transitions. [2021-06-05 21:25:15,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7135 transitions. [2021-06-05 21:25:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:15,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:15,427 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:15,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,627 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:15,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1902475776, now seen corresponding path program 85 times [2021-06-05 21:25:15,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:15,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549961457] [2021-06-05 21:25:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:15,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549961457] [2021-06-05 21:25:15,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549961457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839108720] [2021-06-05 21:25:15,691 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 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 21:25:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:15,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:15,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839108720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:15,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:15,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548071607] [2021-06-05 21:25:15,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:15,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:15,781 INFO L87 Difference]: Start difference. First operand 2152 states and 7135 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:15,938 INFO L93 Difference]: Finished difference Result 3538 states and 11103 transitions. [2021-06-05 21:25:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:25:15,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:15,943 INFO L225 Difference]: With dead ends: 3538 [2021-06-05 21:25:15,943 INFO L226 Difference]: Without dead ends: 3538 [2021-06-05 21:25:15,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-06-05 21:25:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2878. [2021-06-05 21:25:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 3.397636426833507) internal successors, (9775), 2877 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 9775 transitions. [2021-06-05 21:25:15,986 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 9775 transitions. Word has length 20 [2021-06-05 21:25:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:15,986 INFO L482 AbstractCegarLoop]: Abstraction has 2878 states and 9775 transitions. [2021-06-05 21:25:15,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 9775 transitions. [2021-06-05 21:25:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:15,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:15,989 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:16,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-05 21:25:16,190 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1499056694, now seen corresponding path program 86 times [2021-06-05 21:25:16,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:16,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238557898] [2021-06-05 21:25:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:16,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:16,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238557898] [2021-06-05 21:25:16,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238557898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830780685] [2021-06-05 21:25:16,242 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 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 21:25:16,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:16,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:16,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830780685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:16,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:16,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496572992] [2021-06-05 21:25:16,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:16,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:16,308 INFO L87 Difference]: Start difference. First operand 2878 states and 9775 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:16,446 INFO L93 Difference]: Finished difference Result 3252 states and 10560 transitions. [2021-06-05 21:25:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:16,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:16,450 INFO L225 Difference]: With dead ends: 3252 [2021-06-05 21:25:16,450 INFO L226 Difference]: Without dead ends: 3250 [2021-06-05 21:25:16,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-06-05 21:25:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3003. [2021-06-05 21:25:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.389407061958694) internal successors, (10175), 3002 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10175 transitions. [2021-06-05 21:25:16,490 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10175 transitions. Word has length 20 [2021-06-05 21:25:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:16,490 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10175 transitions. [2021-06-05 21:25:16,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10175 transitions. [2021-06-05 21:25:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:16,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:16,493 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:16,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-06-05 21:25:16,694 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 80164216, now seen corresponding path program 87 times [2021-06-05 21:25:16,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:16,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882340810] [2021-06-05 21:25:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:16,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:16,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882340810] [2021-06-05 21:25:16,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882340810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956051816] [2021-06-05 21:25:16,754 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 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 21:25:16,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:16,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:16,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:16,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956051816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:16,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:16,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466063590] [2021-06-05 21:25:16,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:16,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:16,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:16,828 INFO L87 Difference]: Start difference. First operand 3003 states and 10175 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:16,894 INFO L93 Difference]: Finished difference Result 3239 states and 10385 transitions. [2021-06-05 21:25:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:16,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:16,900 INFO L225 Difference]: With dead ends: 3239 [2021-06-05 21:25:16,900 INFO L226 Difference]: Without dead ends: 3239 [2021-06-05 21:25:16,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-06-05 21:25:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2935. [2021-06-05 21:25:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.3677573278800272) internal successors, (9881), 2934 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 9881 transitions. [2021-06-05 21:25:16,961 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 9881 transitions. Word has length 20 [2021-06-05 21:25:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:16,962 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 9881 transitions. [2021-06-05 21:25:16,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 9881 transitions. [2021-06-05 21:25:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:16,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:16,966 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:17,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3042,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:17,189 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1648883118, now seen corresponding path program 88 times [2021-06-05 21:25:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:17,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188891485] [2021-06-05 21:25:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:17,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188891485] [2021-06-05 21:25:17,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188891485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580144255] [2021-06-05 21:25:17,243 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 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 21:25:17,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580144255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:17,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:17,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768562779] [2021-06-05 21:25:17,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:17,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:17,303 INFO L87 Difference]: Start difference. First operand 2935 states and 9881 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:17,384 INFO L93 Difference]: Finished difference Result 3341 states and 10608 transitions. [2021-06-05 21:25:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:17,388 INFO L225 Difference]: With dead ends: 3341 [2021-06-05 21:25:17,388 INFO L226 Difference]: Without dead ends: 3341 [2021-06-05 21:25:17,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-06-05 21:25:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2802. [2021-06-05 21:25:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 3.3491610139235988) internal successors, (9381), 2801 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 9381 transitions. [2021-06-05 21:25:17,421 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 9381 transitions. Word has length 20 [2021-06-05 21:25:17,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:17,421 INFO L482 AbstractCegarLoop]: Abstraction has 2802 states and 9381 transitions. [2021-06-05 21:25:17,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 9381 transitions. [2021-06-05 21:25:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:17,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:17,424 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:17,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3043,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:17,637 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash 585224376, now seen corresponding path program 89 times [2021-06-05 21:25:17,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:17,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132486440] [2021-06-05 21:25:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:17,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132486440] [2021-06-05 21:25:17,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132486440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175860551] [2021-06-05 21:25:17,694 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 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 21:25:17,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:17,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:17,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:17,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175860551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:17,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:17,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135394614] [2021-06-05 21:25:17,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:17,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:17,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:17,755 INFO L87 Difference]: Start difference. First operand 2802 states and 9381 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:17,841 INFO L93 Difference]: Finished difference Result 4613 states and 15295 transitions. [2021-06-05 21:25:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:17,847 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 21:25:17,847 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 21:25:17,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 21:25:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4212. [2021-06-05 21:25:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 4211 states have (on average 3.4713844692472096) internal successors, (14618), 4211 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 14618 transitions. [2021-06-05 21:25:17,906 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 14618 transitions. Word has length 20 [2021-06-05 21:25:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:17,907 INFO L482 AbstractCegarLoop]: Abstraction has 4212 states and 14618 transitions. [2021-06-05 21:25:17,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 14618 transitions. [2021-06-05 21:25:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:17,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:17,910 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:18,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-05 21:25:18,111 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1123079954, now seen corresponding path program 90 times [2021-06-05 21:25:18,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:18,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818350901] [2021-06-05 21:25:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:18,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818350901] [2021-06-05 21:25:18,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818350901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567559088] [2021-06-05 21:25:18,177 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 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 21:25:18,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:25:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567559088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:18,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:18,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766031459] [2021-06-05 21:25:18,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:18,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:18,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:18,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:18,261 INFO L87 Difference]: Start difference. First operand 4212 states and 14618 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:18,410 INFO L93 Difference]: Finished difference Result 5440 states and 18349 transitions. [2021-06-05 21:25:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:18,422 INFO L225 Difference]: With dead ends: 5440 [2021-06-05 21:25:18,422 INFO L226 Difference]: Without dead ends: 5440 [2021-06-05 21:25:18,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-06-05 21:25:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5067. [2021-06-05 21:25:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 3.5063166206079748) internal successors, (17763), 5066 states have internal predecessors, (17763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 17763 transitions. [2021-06-05 21:25:18,520 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 17763 transitions. Word has length 20 [2021-06-05 21:25:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:18,520 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 17763 transitions. [2021-06-05 21:25:18,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 17763 transitions. [2021-06-05 21:25:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:18,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:18,524 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:18,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-06-05 21:25:18,725 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash 616733688, now seen corresponding path program 91 times [2021-06-05 21:25:18,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:18,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794578725] [2021-06-05 21:25:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:18,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794578725] [2021-06-05 21:25:18,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794578725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636465080] [2021-06-05 21:25:18,789 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 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 21:25:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:18,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:18,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636465080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:18,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:18,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346951018] [2021-06-05 21:25:18,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:18,848 INFO L87 Difference]: Start difference. First operand 5067 states and 17763 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:19,035 INFO L93 Difference]: Finished difference Result 6110 states and 20625 transitions. [2021-06-05 21:25:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:19,043 INFO L225 Difference]: With dead ends: 6110 [2021-06-05 21:25:19,043 INFO L226 Difference]: Without dead ends: 6110 [2021-06-05 21:25:19,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:25:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2021-06-05 21:25:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 5618. [2021-06-05 21:25:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5617 states have (on average 3.5143314936799004) internal successors, (19740), 5617 states have internal predecessors, (19740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 19740 transitions. [2021-06-05 21:25:19,138 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 19740 transitions. Word has length 20 [2021-06-05 21:25:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:19,138 INFO L482 AbstractCegarLoop]: Abstraction has 5618 states and 19740 transitions. [2021-06-05 21:25:19,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 19740 transitions. [2021-06-05 21:25:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:19,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:19,143 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:19,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:19,343 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2093644800, now seen corresponding path program 92 times [2021-06-05 21:25:19,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:19,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929515674] [2021-06-05 21:25:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:25:19,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:19,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929515674] [2021-06-05 21:25:19,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929515674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:19,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216434179] [2021-06-05 21:25:19,384 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 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 21:25:19,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:19,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:25:19,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216434179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:19,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:19,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:25:19,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587118194] [2021-06-05 21:25:19,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:25:19,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:25:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:25:19,438 INFO L87 Difference]: Start difference. First operand 5618 states and 19740 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:19,592 INFO L93 Difference]: Finished difference Result 7038 states and 24489 transitions. [2021-06-05 21:25:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:25:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:19,604 INFO L225 Difference]: With dead ends: 7038 [2021-06-05 21:25:19,604 INFO L226 Difference]: Without dead ends: 7034 [2021-06-05 21:25:19,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-06-05 21:25:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6840. [2021-06-05 21:25:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 3.5451089340546864) internal successors, (24245), 6839 states have internal predecessors, (24245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 24245 transitions. [2021-06-05 21:25:19,733 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 24245 transitions. Word has length 20 [2021-06-05 21:25:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:19,733 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 24245 transitions. [2021-06-05 21:25:19,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 24245 transitions. [2021-06-05 21:25:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:19,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:19,738 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:19,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:19,938 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash 178840000, now seen corresponding path program 93 times [2021-06-05 21:25:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:19,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587434158] [2021-06-05 21:25:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:19,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:19,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587434158] [2021-06-05 21:25:19,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587434158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:19,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704432481] [2021-06-05 21:25:19,988 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 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 21:25:20,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:20,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:20,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:25:20,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704432481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:20,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:20,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:25:20,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362043388] [2021-06-05 21:25:20,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:20,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:20,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:20,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:20,065 INFO L87 Difference]: Start difference. First operand 6840 states and 24245 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:20,185 INFO L93 Difference]: Finished difference Result 7707 states and 26447 transitions. [2021-06-05 21:25:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:20,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:20,201 INFO L225 Difference]: With dead ends: 7707 [2021-06-05 21:25:20,201 INFO L226 Difference]: Without dead ends: 7707 [2021-06-05 21:25:20,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-06-05 21:25:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 7206. [2021-06-05 21:25:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.5443442054129077) internal successors, (25537), 7205 states have internal predecessors, (25537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 25537 transitions. [2021-06-05 21:25:20,313 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 25537 transitions. Word has length 20 [2021-06-05 21:25:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:20,313 INFO L482 AbstractCegarLoop]: Abstraction has 7206 states and 25537 transitions. [2021-06-05 21:25:20,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 25537 transitions. [2021-06-05 21:25:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:20,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:20,318 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:20,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:20,519 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash -327506266, now seen corresponding path program 94 times [2021-06-05 21:25:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:20,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454174047] [2021-06-05 21:25:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:20,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:20,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454174047] [2021-06-05 21:25:20,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454174047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:20,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990221733] [2021-06-05 21:25:20,574 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 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 21:25:20,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:20,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:20,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990221733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:20,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:20,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:20,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643960569] [2021-06-05 21:25:20,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:20,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:20,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:20,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:20,634 INFO L87 Difference]: Start difference. First operand 7206 states and 25537 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:20,748 INFO L93 Difference]: Finished difference Result 8954 states and 30890 transitions. [2021-06-05 21:25:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:20,762 INFO L225 Difference]: With dead ends: 8954 [2021-06-05 21:25:20,762 INFO L226 Difference]: Without dead ends: 8954 [2021-06-05 21:25:20,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8954 states. [2021-06-05 21:25:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8954 to 8254. [2021-06-05 21:25:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 8253 states have (on average 3.561008118260027) internal successors, (29389), 8253 states have internal predecessors, (29389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 29389 transitions. [2021-06-05 21:25:20,900 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 29389 transitions. Word has length 20 [2021-06-05 21:25:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:20,900 INFO L482 AbstractCegarLoop]: Abstraction has 8254 states and 29389 transitions. [2021-06-05 21:25:20,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 29389 transitions. [2021-06-05 21:25:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:20,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:20,905 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:21,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3049,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:21,105 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash 210349312, now seen corresponding path program 95 times [2021-06-05 21:25:21,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:21,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517777502] [2021-06-05 21:25:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:21,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517777502] [2021-06-05 21:25:21,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517777502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131872766] [2021-06-05 21:25:21,158 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 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 21:25:21,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:21,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131872766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:21,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835347929] [2021-06-05 21:25:21,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:21,218 INFO L87 Difference]: Start difference. First operand 8254 states and 29389 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:21,372 INFO L93 Difference]: Finished difference Result 9105 states and 31585 transitions. [2021-06-05 21:25:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:25:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:21,388 INFO L225 Difference]: With dead ends: 9105 [2021-06-05 21:25:21,388 INFO L226 Difference]: Without dead ends: 9105 [2021-06-05 21:25:21,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-06-05 21:25:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 8656. [2021-06-05 21:25:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 3.5648757943385325) internal successors, (30854), 8655 states have internal predecessors, (30854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 30854 transitions. [2021-06-05 21:25:21,549 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 30854 transitions. Word has length 20 [2021-06-05 21:25:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:21,549 INFO L482 AbstractCegarLoop]: Abstraction has 8656 states and 30854 transitions. [2021-06-05 21:25:21,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 30854 transitions. [2021-06-05 21:25:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:21,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:21,554 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:21,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-06-05 21:25:21,754 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1155628672, now seen corresponding path program 96 times [2021-06-05 21:25:21,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:21,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324042916] [2021-06-05 21:25:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324042916] [2021-06-05 21:25:21,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324042916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187967297] [2021-06-05 21:25:21,819 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 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 21:25:21,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:25:21,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:21,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:21,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:21,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187967297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:21,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:21,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:21,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235920501] [2021-06-05 21:25:21,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:21,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:21,899 INFO L87 Difference]: Start difference. First operand 8656 states and 30854 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:22,035 INFO L93 Difference]: Finished difference Result 9529 states and 33025 transitions. [2021-06-05 21:25:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:22,054 INFO L225 Difference]: With dead ends: 9529 [2021-06-05 21:25:22,054 INFO L226 Difference]: Without dead ends: 9529 [2021-06-05 21:25:22,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2021-06-05 21:25:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 4249. [2021-06-05 21:25:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 3.398069679849341) internal successors, (14435), 4248 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 14435 transitions. [2021-06-05 21:25:22,166 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 14435 transitions. Word has length 20 [2021-06-05 21:25:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:22,166 INFO L482 AbstractCegarLoop]: Abstraction has 4249 states and 14435 transitions. [2021-06-05 21:25:22,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 14435 transitions. [2021-06-05 21:25:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:22,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:22,171 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:22,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-06-05 21:25:22,371 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1693484250, now seen corresponding path program 97 times [2021-06-05 21:25:22,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:22,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035668755] [2021-06-05 21:25:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:22,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035668755] [2021-06-05 21:25:22,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035668755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268678511] [2021-06-05 21:25:22,427 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 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 21:25:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:22,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:22,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:22,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268678511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:22,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:22,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:22,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146324388] [2021-06-05 21:25:22,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:22,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:22,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:22,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:22,488 INFO L87 Difference]: Start difference. First operand 4249 states and 14435 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:22,607 INFO L93 Difference]: Finished difference Result 5911 states and 19624 transitions. [2021-06-05 21:25:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:22,616 INFO L225 Difference]: With dead ends: 5911 [2021-06-05 21:25:22,616 INFO L226 Difference]: Without dead ends: 5911 [2021-06-05 21:25:22,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-05 21:25:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4539. [2021-06-05 21:25:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.4169237549581313) internal successors, (15506), 4538 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 15506 transitions. [2021-06-05 21:25:22,690 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 15506 transitions. Word has length 20 [2021-06-05 21:25:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:22,690 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 15506 transitions. [2021-06-05 21:25:22,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 15506 transitions. [2021-06-05 21:25:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:22,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:22,693 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:22,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3052,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:22,894 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:22,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1187137984, now seen corresponding path program 98 times [2021-06-05 21:25:22,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:22,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405381788] [2021-06-05 21:25:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:22,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405381788] [2021-06-05 21:25:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405381788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799532736] [2021-06-05 21:25:22,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:25:22,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:22,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:22,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799532736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:23,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:23,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044108475] [2021-06-05 21:25:23,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:23,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:23,036 INFO L87 Difference]: Start difference. First operand 4539 states and 15506 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:23,235 INFO L93 Difference]: Finished difference Result 5172 states and 16881 transitions. [2021-06-05 21:25:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:23,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:23,242 INFO L225 Difference]: With dead ends: 5172 [2021-06-05 21:25:23,242 INFO L226 Difference]: Without dead ends: 5172 [2021-06-05 21:25:23,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:25:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-06-05 21:25:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4463. [2021-06-05 21:25:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.4195428059166293) internal successors, (15258), 4462 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 15258 transitions. [2021-06-05 21:25:23,328 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 15258 transitions. Word has length 20 [2021-06-05 21:25:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:23,328 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 15258 transitions. [2021-06-05 21:25:23,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 15258 transitions. [2021-06-05 21:25:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:23,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:23,332 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:23,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3053 [2021-06-05 21:25:23,532 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:23,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2098857720, now seen corresponding path program 99 times [2021-06-05 21:25:23,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:23,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375615287] [2021-06-05 21:25:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:23,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:23,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375615287] [2021-06-05 21:25:23,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375615287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299679377] [2021-06-05 21:25:23,581 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 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 21:25:23,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:23,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:23,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:23,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299679377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:23,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:23,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:23,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222862351] [2021-06-05 21:25:23,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:23,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:23,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:23,642 INFO L87 Difference]: Start difference. First operand 4463 states and 15258 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:23,787 INFO L93 Difference]: Finished difference Result 4711 states and 15597 transitions. [2021-06-05 21:25:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:23,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:23,793 INFO L225 Difference]: With dead ends: 4711 [2021-06-05 21:25:23,793 INFO L226 Difference]: Without dead ends: 4707 [2021-06-05 21:25:23,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-06-05 21:25:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4073. [2021-06-05 21:25:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.394400785854617) internal successors, (13822), 4072 states have internal predecessors, (13822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 13822 transitions. [2021-06-05 21:25:23,856 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 13822 transitions. Word has length 20 [2021-06-05 21:25:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:23,856 INFO L482 AbstractCegarLoop]: Abstraction has 4073 states and 13822 transitions. [2021-06-05 21:25:23,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 13822 transitions. [2021-06-05 21:25:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:23,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:23,860 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:24,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 21:25:24,060 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash -616888666, now seen corresponding path program 100 times [2021-06-05 21:25:24,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:24,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933896423] [2021-06-05 21:25:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:24,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933896423] [2021-06-05 21:25:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933896423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541289490] [2021-06-05 21:25:24,120 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 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 21:25:24,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:24,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:24,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:24,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541289490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:24,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:24,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709143757] [2021-06-05 21:25:24,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:24,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:24,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:24,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:24,184 INFO L87 Difference]: Start difference. First operand 4073 states and 13822 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:24,252 INFO L93 Difference]: Finished difference Result 4367 states and 14243 transitions. [2021-06-05 21:25:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:25:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:24,265 INFO L225 Difference]: With dead ends: 4367 [2021-06-05 21:25:24,265 INFO L226 Difference]: Without dead ends: 4367 [2021-06-05 21:25:24,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-06-05 21:25:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 4077. [2021-06-05 21:25:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 3.3851815505397447) internal successors, (13798), 4076 states have internal predecessors, (13798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 13798 transitions. [2021-06-05 21:25:24,337 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 13798 transitions. Word has length 20 [2021-06-05 21:25:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:24,338 INFO L482 AbstractCegarLoop]: Abstraction has 4077 states and 13798 transitions. [2021-06-05 21:25:24,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 13798 transitions. [2021-06-05 21:25:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:24,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:24,341 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:24,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-05 21:25:24,542 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1949031296, now seen corresponding path program 101 times [2021-06-05 21:25:24,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:24,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867042169] [2021-06-05 21:25:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:24,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:24,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867042169] [2021-06-05 21:25:24,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867042169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604183334] [2021-06-05 21:25:24,593 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 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 21:25:24,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:24,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:24,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:24,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:24,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604183334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:24,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:24,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:24,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228209455] [2021-06-05 21:25:24,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:24,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:24,669 INFO L87 Difference]: Start difference. First operand 4077 states and 13798 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:24,736 INFO L93 Difference]: Finished difference Result 4294 states and 13975 transitions. [2021-06-05 21:25:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:24,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:24,741 INFO L225 Difference]: With dead ends: 4294 [2021-06-05 21:25:24,742 INFO L226 Difference]: Without dead ends: 4294 [2021-06-05 21:25:24,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-06-05 21:25:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3913. [2021-06-05 21:25:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 3.3785787321063396) internal successors, (13217), 3912 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 13217 transitions. [2021-06-05 21:25:24,792 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 13217 transitions. Word has length 20 [2021-06-05 21:25:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:24,792 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 13217 transitions. [2021-06-05 21:25:24,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 13217 transitions. [2021-06-05 21:25:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:24,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:24,795 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:24,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-06-05 21:25:24,995 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -111828506, now seen corresponding path program 102 times [2021-06-05 21:25:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:24,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889995507] [2021-06-05 21:25:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:25,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:25,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889995507] [2021-06-05 21:25:25,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889995507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963052361] [2021-06-05 21:25:25,051 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 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 21:25:25,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:25:25,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:25,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963052361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:25,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:25,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351766971] [2021-06-05 21:25:25,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:25,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:25,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:25,117 INFO L87 Difference]: Start difference. First operand 3913 states and 13217 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:25,236 INFO L93 Difference]: Finished difference Result 4333 states and 14025 transitions. [2021-06-05 21:25:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:25,241 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 21:25:25,241 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 21:25:25,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 21:25:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3900. [2021-06-05 21:25:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 3.368043087971275) internal successors, (13132), 3899 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 13132 transitions. [2021-06-05 21:25:25,294 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 13132 transitions. Word has length 20 [2021-06-05 21:25:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:25,294 INFO L482 AbstractCegarLoop]: Abstraction has 3900 states and 13132 transitions. [2021-06-05 21:25:25,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 13132 transitions. [2021-06-05 21:25:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:25,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:25,297 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:25,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:25,498 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash 426027072, now seen corresponding path program 103 times [2021-06-05 21:25:25,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:25,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462020772] [2021-06-05 21:25:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:25,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:25,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462020772] [2021-06-05 21:25:25,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462020772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218570852] [2021-06-05 21:25:25,561 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 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 21:25:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:25,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218570852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:25,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:25,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:25,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693705349] [2021-06-05 21:25:25,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:25,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:25,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:25,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:25,643 INFO L87 Difference]: Start difference. First operand 3900 states and 13132 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:25,751 INFO L93 Difference]: Finished difference Result 5075 states and 16651 transitions. [2021-06-05 21:25:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:25,759 INFO L225 Difference]: With dead ends: 5075 [2021-06-05 21:25:25,759 INFO L226 Difference]: Without dead ends: 5075 [2021-06-05 21:25:25,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-06-05 21:25:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4093. [2021-06-05 21:25:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 3.374144672531769) internal successors, (13807), 4092 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 13807 transitions. [2021-06-05 21:25:25,809 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 13807 transitions. Word has length 20 [2021-06-05 21:25:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:25,809 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 13807 transitions. [2021-06-05 21:25:25,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 13807 transitions. [2021-06-05 21:25:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:25,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:25,812 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:26,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:26,012 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash -80319194, now seen corresponding path program 104 times [2021-06-05 21:25:26,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:26,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608266101] [2021-06-05 21:25:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:26,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608266101] [2021-06-05 21:25:26,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608266101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817982003] [2021-06-05 21:25:26,089 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 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 21:25:26,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:26,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817982003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:26,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:26,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887050487] [2021-06-05 21:25:26,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:26,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:26,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:26,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:26,176 INFO L87 Difference]: Start difference. First operand 4093 states and 13807 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:26,346 INFO L93 Difference]: Finished difference Result 4713 states and 15274 transitions. [2021-06-05 21:25:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:25:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:26,356 INFO L225 Difference]: With dead ends: 4713 [2021-06-05 21:25:26,356 INFO L226 Difference]: Without dead ends: 4713 [2021-06-05 21:25:26,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:25:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-06-05 21:25:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4207. [2021-06-05 21:25:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 3.378982406086543) internal successors, (14212), 4206 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 14212 transitions. [2021-06-05 21:25:26,417 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 14212 transitions. Word has length 20 [2021-06-05 21:25:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:26,417 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 14212 transitions. [2021-06-05 21:25:26,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 14212 transitions. [2021-06-05 21:25:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:26,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:26,420 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:26,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:26,621 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1402815744, now seen corresponding path program 105 times [2021-06-05 21:25:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:26,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704373391] [2021-06-05 21:25:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:26,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704373391] [2021-06-05 21:25:26,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704373391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386185938] [2021-06-05 21:25:26,694 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 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 21:25:26,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:26,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386185938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:26,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:26,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376479629] [2021-06-05 21:25:26,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:26,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:26,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:26,775 INFO L87 Difference]: Start difference. First operand 4207 states and 14212 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:27,049 INFO L93 Difference]: Finished difference Result 5066 states and 16291 transitions. [2021-06-05 21:25:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:25:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:27,057 INFO L225 Difference]: With dead ends: 5066 [2021-06-05 21:25:27,057 INFO L226 Difference]: Without dead ends: 5066 [2021-06-05 21:25:27,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:25:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-06-05 21:25:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4561. [2021-06-05 21:25:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 3.3802631578947366) internal successors, (15414), 4560 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 15414 transitions. [2021-06-05 21:25:27,124 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 15414 transitions. Word has length 20 [2021-06-05 21:25:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:27,124 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 15414 transitions. [2021-06-05 21:25:27,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 15414 transitions. [2021-06-05 21:25:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:27,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:27,127 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:27,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:27,328 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1590980808, now seen corresponding path program 106 times [2021-06-05 21:25:27,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:27,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970952379] [2021-06-05 21:25:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:27,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:27,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970952379] [2021-06-05 21:25:27,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970952379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508523785] [2021-06-05 21:25:27,381 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 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 21:25:27,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:25:27,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508523785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:27,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:25:27,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704534345] [2021-06-05 21:25:27,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:25:27,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:25:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:25:27,443 INFO L87 Difference]: Start difference. First operand 4561 states and 15414 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:27,617 INFO L93 Difference]: Finished difference Result 5249 states and 17354 transitions. [2021-06-05 21:25:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:27,624 INFO L225 Difference]: With dead ends: 5249 [2021-06-05 21:25:27,624 INFO L226 Difference]: Without dead ends: 5245 [2021-06-05 21:25:27,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-06-05 21:25:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4651. [2021-06-05 21:25:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 3.3821505376344088) internal successors, (15727), 4650 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 15727 transitions. [2021-06-05 21:25:27,716 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 15727 transitions. Word has length 20 [2021-06-05 21:25:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:27,716 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 15727 transitions. [2021-06-05 21:25:27,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 15727 transitions. [2021-06-05 21:25:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:27,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:27,719 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:27,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-06-05 21:25:27,919 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash 713013304, now seen corresponding path program 107 times [2021-06-05 21:25:27,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:27,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423558600] [2021-06-05 21:25:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:27,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:27,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423558600] [2021-06-05 21:25:27,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423558600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:27,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644825267] [2021-06-05 21:25:27,969 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 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 21:25:27,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:27,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:27,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:28,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644825267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:28,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:28,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:28,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182508898] [2021-06-05 21:25:28,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:28,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:28,029 INFO L87 Difference]: Start difference. First operand 4651 states and 15727 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:28,162 INFO L93 Difference]: Finished difference Result 5919 states and 19183 transitions. [2021-06-05 21:25:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:25:28,162 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:28,169 INFO L225 Difference]: With dead ends: 5919 [2021-06-05 21:25:28,170 INFO L226 Difference]: Without dead ends: 5919 [2021-06-05 21:25:28,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-06-05 21:25:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5338. [2021-06-05 21:25:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.389357316844669) internal successors, (18089), 5337 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18089 transitions. [2021-06-05 21:25:28,242 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18089 transitions. Word has length 20 [2021-06-05 21:25:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:28,242 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18089 transitions. [2021-06-05 21:25:28,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18089 transitions. [2021-06-05 21:25:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:28,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:28,246 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:28,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:28,446 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2098819054, now seen corresponding path program 108 times [2021-06-05 21:25:28,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:28,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422170051] [2021-06-05 21:25:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:28,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:28,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422170051] [2021-06-05 21:25:28,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422170051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:28,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047441528] [2021-06-05 21:25:28,501 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 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 21:25:28,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:28,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:28,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:28,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047441528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:28,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:28,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:28,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040552009] [2021-06-05 21:25:28,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:28,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:28,564 INFO L87 Difference]: Start difference. First operand 5338 states and 18089 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:28,699 INFO L93 Difference]: Finished difference Result 6269 states and 20414 transitions. [2021-06-05 21:25:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:25:28,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:28,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:28,707 INFO L225 Difference]: With dead ends: 6269 [2021-06-05 21:25:28,707 INFO L226 Difference]: Without dead ends: 6269 [2021-06-05 21:25:28,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-06-05 21:25:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4444. [2021-06-05 21:25:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.356290794508215) internal successors, (14912), 4443 states have internal predecessors, (14912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 14912 transitions. [2021-06-05 21:25:28,775 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 14912 transitions. Word has length 20 [2021-06-05 21:25:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:28,775 INFO L482 AbstractCegarLoop]: Abstraction has 4444 states and 14912 transitions. [2021-06-05 21:25:28,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 14912 transitions. [2021-06-05 21:25:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:28,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:28,778 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:28,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3063 [2021-06-05 21:25:28,979 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1689801976, now seen corresponding path program 109 times [2021-06-05 21:25:28,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:28,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786015839] [2021-06-05 21:25:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:29,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:29,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786015839] [2021-06-05 21:25:29,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786015839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969104805] [2021-06-05 21:25:29,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:25:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:29,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969104805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:29,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:29,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212487829] [2021-06-05 21:25:29,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:29,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:29,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:29,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:29,102 INFO L87 Difference]: Start difference. First operand 4444 states and 14912 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:29,282 INFO L93 Difference]: Finished difference Result 5453 states and 17524 transitions. [2021-06-05 21:25:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:29,290 INFO L225 Difference]: With dead ends: 5453 [2021-06-05 21:25:29,290 INFO L226 Difference]: Without dead ends: 5453 [2021-06-05 21:25:29,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:25:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-06-05 21:25:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4957. [2021-06-05 21:25:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.3668280871670704) internal successors, (16686), 4956 states have internal predecessors, (16686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 16686 transitions. [2021-06-05 21:25:29,358 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 16686 transitions. Word has length 20 [2021-06-05 21:25:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:29,358 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 16686 transitions. [2021-06-05 21:25:29,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 16686 transitions. [2021-06-05 21:25:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:29,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:29,362 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:29,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3064 [2021-06-05 21:25:29,577 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:29,577 INFO L82 PathProgramCache]: Analyzing trace with hash 928691064, now seen corresponding path program 110 times [2021-06-05 21:25:29,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:29,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670800614] [2021-06-05 21:25:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:29,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:29,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670800614] [2021-06-05 21:25:29,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670800614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267818992] [2021-06-05 21:25:29,634 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 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 21:25:29,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:29,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267818992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:29,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:29,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:29,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674098561] [2021-06-05 21:25:29,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:29,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:29,700 INFO L87 Difference]: Start difference. First operand 4957 states and 16686 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:29,828 INFO L93 Difference]: Finished difference Result 5535 states and 17962 transitions. [2021-06-05 21:25:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:29,834 INFO L225 Difference]: With dead ends: 5535 [2021-06-05 21:25:29,834 INFO L226 Difference]: Without dead ends: 5535 [2021-06-05 21:25:29,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-06-05 21:25:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4104. [2021-06-05 21:25:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 3.3346331952230077) internal successors, (13682), 4103 states have internal predecessors, (13682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 13682 transitions. [2021-06-05 21:25:29,888 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 13682 transitions. Word has length 20 [2021-06-05 21:25:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:29,888 INFO L482 AbstractCegarLoop]: Abstraction has 4104 states and 13682 transitions. [2021-06-05 21:25:29,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 13682 transitions. [2021-06-05 21:25:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:29,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:29,891 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:30,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3065 [2021-06-05 21:25:30,092 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash 422344798, now seen corresponding path program 111 times [2021-06-05 21:25:30,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:30,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865472937] [2021-06-05 21:25:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:30,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:30,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865472937] [2021-06-05 21:25:30,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865472937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832056149] [2021-06-05 21:25:30,149 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 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 21:25:30,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:30,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:30,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832056149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:30,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:30,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296907268] [2021-06-05 21:25:30,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:30,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:30,215 INFO L87 Difference]: Start difference. First operand 4104 states and 13682 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:30,377 INFO L93 Difference]: Finished difference Result 4959 states and 15903 transitions. [2021-06-05 21:25:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:25:30,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:30,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:30,383 INFO L225 Difference]: With dead ends: 4959 [2021-06-05 21:25:30,383 INFO L226 Difference]: Without dead ends: 4959 [2021-06-05 21:25:30,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:25:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-06-05 21:25:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3875. [2021-06-05 21:25:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 3.3304078471863705) internal successors, (12902), 3874 states have internal predecessors, (12902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 12902 transitions. [2021-06-05 21:25:30,436 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 12902 transitions. Word has length 20 [2021-06-05 21:25:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:30,437 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 12902 transitions. [2021-06-05 21:25:30,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 12902 transitions. [2021-06-05 21:25:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:30,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:30,440 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:30,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-06-05 21:25:30,640 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:30,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1905479736, now seen corresponding path program 112 times [2021-06-05 21:25:30,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:30,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095496910] [2021-06-05 21:25:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:30,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:30,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095496910] [2021-06-05 21:25:30,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095496910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893537472] [2021-06-05 21:25:30,700 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 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 21:25:30,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:30,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:30,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:30,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893537472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:30,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:30,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:30,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803155134] [2021-06-05 21:25:30,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:30,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:30,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:30,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:30,765 INFO L87 Difference]: Start difference. First operand 3875 states and 12902 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:31,005 INFO L93 Difference]: Finished difference Result 4630 states and 14540 transitions. [2021-06-05 21:25:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:25:31,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:31,010 INFO L225 Difference]: With dead ends: 4630 [2021-06-05 21:25:31,010 INFO L226 Difference]: Without dead ends: 4630 [2021-06-05 21:25:31,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:25:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-06-05 21:25:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3885. [2021-06-05 21:25:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.33264675592173) internal successors, (12944), 3884 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 12944 transitions. [2021-06-05 21:25:31,053 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 12944 transitions. Word has length 20 [2021-06-05 21:25:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:31,054 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 12944 transitions. [2021-06-05 21:25:31,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 12944 transitions. [2021-06-05 21:25:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:31,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:31,056 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:31,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 21:25:31,279 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1965054858, now seen corresponding path program 113 times [2021-06-05 21:25:31,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:31,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735421071] [2021-06-05 21:25:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:31,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735421071] [2021-06-05 21:25:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735421071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190646739] [2021-06-05 21:25:31,331 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 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 21:25:31,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:31,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:31,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:31,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190646739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:31,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:31,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282425647] [2021-06-05 21:25:31,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:31,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:31,386 INFO L87 Difference]: Start difference. First operand 3885 states and 12944 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:31,515 INFO L93 Difference]: Finished difference Result 4118 states and 13256 transitions. [2021-06-05 21:25:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:31,520 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 21:25:31,520 INFO L226 Difference]: Without dead ends: 4114 [2021-06-05 21:25:31,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-06-05 21:25:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 3838. [2021-06-05 21:25:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 3.3281209278081834) internal successors, (12770), 3837 states have internal predecessors, (12770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 12770 transitions. [2021-06-05 21:25:31,567 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 12770 transitions. Word has length 20 [2021-06-05 21:25:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:31,567 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 12770 transitions. [2021-06-05 21:25:31,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 12770 transitions. [2021-06-05 21:25:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:31,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:31,570 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:31,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:31,771 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:31,771 INFO L82 PathProgramCache]: Analyzing trace with hash -750691528, now seen corresponding path program 114 times [2021-06-05 21:25:31,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:31,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547786837] [2021-06-05 21:25:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:31,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:31,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547786837] [2021-06-05 21:25:31,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547786837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438245707] [2021-06-05 21:25:31,824 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 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 21:25:31,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:31,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:31,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:31,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438245707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:31,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:31,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:31,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227962004] [2021-06-05 21:25:31,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:31,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:31,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:31,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:31,883 INFO L87 Difference]: Start difference. First operand 3838 states and 12770 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:31,963 INFO L93 Difference]: Finished difference Result 4108 states and 13151 transitions. [2021-06-05 21:25:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:31,968 INFO L225 Difference]: With dead ends: 4108 [2021-06-05 21:25:31,968 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 21:25:31,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 21:25:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3833. [2021-06-05 21:25:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 3.325678496868476) internal successors, (12744), 3832 states have internal predecessors, (12744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 12744 transitions. [2021-06-05 21:25:32,020 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 12744 transitions. Word has length 20 [2021-06-05 21:25:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:32,020 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 12744 transitions. [2021-06-05 21:25:32,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 12744 transitions. [2021-06-05 21:25:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:32,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:32,023 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:32,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3069,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:32,224 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1815228434, now seen corresponding path program 115 times [2021-06-05 21:25:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:32,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804821448] [2021-06-05 21:25:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:32,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:32,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804821448] [2021-06-05 21:25:32,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804821448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698989002] [2021-06-05 21:25:32,273 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 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 21:25:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:32,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:32,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698989002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:32,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:32,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250725975] [2021-06-05 21:25:32,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:32,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:32,345 INFO L87 Difference]: Start difference. First operand 3833 states and 12744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:32,433 INFO L93 Difference]: Finished difference Result 4122 states and 13177 transitions. [2021-06-05 21:25:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:32,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:32,438 INFO L225 Difference]: With dead ends: 4122 [2021-06-05 21:25:32,438 INFO L226 Difference]: Without dead ends: 4122 [2021-06-05 21:25:32,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-06-05 21:25:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3834. [2021-06-05 21:25:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 3.3229846073571614) internal successors, (12737), 3833 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 12737 transitions. [2021-06-05 21:25:32,485 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 12737 transitions. Word has length 20 [2021-06-05 21:25:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:32,485 INFO L482 AbstractCegarLoop]: Abstraction has 3834 states and 12737 transitions. [2021-06-05 21:25:32,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 12737 transitions. [2021-06-05 21:25:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:32,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:32,488 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:32,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3070,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:32,689 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash -245631368, now seen corresponding path program 116 times [2021-06-05 21:25:32,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:32,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253757884] [2021-06-05 21:25:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:32,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:32,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253757884] [2021-06-05 21:25:32,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253757884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472105813] [2021-06-05 21:25:32,737 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 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 21:25:32,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:32,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:32,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:32,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472105813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:32,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:32,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:32,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38074688] [2021-06-05 21:25:32,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:32,803 INFO L87 Difference]: Start difference. First operand 3834 states and 12737 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:32,875 INFO L93 Difference]: Finished difference Result 5426 states and 17609 transitions. [2021-06-05 21:25:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:25:32,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:32,882 INFO L225 Difference]: With dead ends: 5426 [2021-06-05 21:25:32,882 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 21:25:32,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 21:25:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5130. [2021-06-05 21:25:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 3.3450965100409435) internal successors, (17157), 5129 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 17157 transitions. [2021-06-05 21:25:32,950 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 17157 transitions. Word has length 20 [2021-06-05 21:25:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:32,950 INFO L482 AbstractCegarLoop]: Abstraction has 5130 states and 17157 transitions. [2021-06-05 21:25:32,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 17157 transitions. [2021-06-05 21:25:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:32,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:32,954 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:33,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:33,154 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash 292224210, now seen corresponding path program 117 times [2021-06-05 21:25:33,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:33,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654676406] [2021-06-05 21:25:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:33,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:33,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654676406] [2021-06-05 21:25:33,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654676406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61853661] [2021-06-05 21:25:33,211 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 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 21:25:33,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:33,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:33,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:33,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61853661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:33,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:33,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769710607] [2021-06-05 21:25:33,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:33,277 INFO L87 Difference]: Start difference. First operand 5130 states and 17157 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:33,391 INFO L93 Difference]: Finished difference Result 5508 states and 17780 transitions. [2021-06-05 21:25:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:33,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:33,397 INFO L225 Difference]: With dead ends: 5508 [2021-06-05 21:25:33,397 INFO L226 Difference]: Without dead ends: 5508 [2021-06-05 21:25:33,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-06-05 21:25:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5142. [2021-06-05 21:25:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 3.3433184205407507) internal successors, (17188), 5141 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 17188 transitions. [2021-06-05 21:25:33,458 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 17188 transitions. Word has length 20 [2021-06-05 21:25:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:33,458 INFO L482 AbstractCegarLoop]: Abstraction has 5142 states and 17188 transitions. [2021-06-05 21:25:33,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 17188 transitions. [2021-06-05 21:25:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:33,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:33,461 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:33,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-06-05 21:25:33,662 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:33,662 INFO L82 PathProgramCache]: Analyzing trace with hash -214122056, now seen corresponding path program 118 times [2021-06-05 21:25:33,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:33,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763315638] [2021-06-05 21:25:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:33,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:33,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763315638] [2021-06-05 21:25:33,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763315638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679162726] [2021-06-05 21:25:33,772 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 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 21:25:33,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:33,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:33,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:33,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679162726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:33,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:33,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:33,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884582939] [2021-06-05 21:25:33,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:33,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:33,852 INFO L87 Difference]: Start difference. First operand 5142 states and 17188 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:33,971 INFO L93 Difference]: Finished difference Result 5808 states and 18946 transitions. [2021-06-05 21:25:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:33,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:33,977 INFO L225 Difference]: With dead ends: 5808 [2021-06-05 21:25:33,977 INFO L226 Difference]: Without dead ends: 5808 [2021-06-05 21:25:33,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-06-05 21:25:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5576. [2021-06-05 21:25:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5575 states have (on average 3.337219730941704) internal successors, (18605), 5575 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 18605 transitions. [2021-06-05 21:25:34,048 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 18605 transitions. Word has length 20 [2021-06-05 21:25:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:34,048 INFO L482 AbstractCegarLoop]: Abstraction has 5576 states and 18605 transitions. [2021-06-05 21:25:34,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 18605 transitions. [2021-06-05 21:25:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:34,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:34,051 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:34,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-06-05 21:25:34,265 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1269012882, now seen corresponding path program 119 times [2021-06-05 21:25:34,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:34,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421027108] [2021-06-05 21:25:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:34,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:34,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421027108] [2021-06-05 21:25:34,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421027108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162616868] [2021-06-05 21:25:34,327 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 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 21:25:34,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:34,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:34,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:34,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162616868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:34,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:34,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684238470] [2021-06-05 21:25:34,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:34,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:34,397 INFO L87 Difference]: Start difference. First operand 5576 states and 18605 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:34,595 INFO L93 Difference]: Finished difference Result 6051 states and 19578 transitions. [2021-06-05 21:25:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:34,604 INFO L225 Difference]: With dead ends: 6051 [2021-06-05 21:25:34,604 INFO L226 Difference]: Without dead ends: 6051 [2021-06-05 21:25:34,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:25:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-05 21:25:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 5723. [2021-06-05 21:25:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.3318769660957708) internal successors, (19065), 5722 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19065 transitions. [2021-06-05 21:25:34,679 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19065 transitions. Word has length 20 [2021-06-05 21:25:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:34,679 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19065 transitions. [2021-06-05 21:25:34,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19065 transitions. [2021-06-05 21:25:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:34,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:34,683 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:34,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:34,884 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:34,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1555704, now seen corresponding path program 120 times [2021-06-05 21:25:34,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:34,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789528720] [2021-06-05 21:25:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:34,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789528720] [2021-06-05 21:25:34,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789528720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480621734] [2021-06-05 21:25:34,948 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 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 21:25:34,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:34,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:34,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:34,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:35,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480621734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:35,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:35,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20231506] [2021-06-05 21:25:35,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:35,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:35,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:35,022 INFO L87 Difference]: Start difference. First operand 5723 states and 19065 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:35,289 INFO L93 Difference]: Finished difference Result 6305 states and 20268 transitions. [2021-06-05 21:25:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:25:35,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:35,299 INFO L225 Difference]: With dead ends: 6305 [2021-06-05 21:25:35,300 INFO L226 Difference]: Without dead ends: 6305 [2021-06-05 21:25:35,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=471, Invalid=935, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:25:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-06-05 21:25:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5812. [2021-06-05 21:25:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.3271381861985887) internal successors, (19334), 5811 states have internal predecessors, (19334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19334 transitions. [2021-06-05 21:25:35,382 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19334 transitions. Word has length 20 [2021-06-05 21:25:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:35,383 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 19334 transitions. [2021-06-05 21:25:35,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19334 transitions. [2021-06-05 21:25:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:35,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:35,387 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:35,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-05 21:25:35,588 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1106701056, now seen corresponding path program 121 times [2021-06-05 21:25:35,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:35,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435106665] [2021-06-05 21:25:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:35,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435106665] [2021-06-05 21:25:35,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435106665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919840309] [2021-06-05 21:25:35,636 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 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 21:25:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:35,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:35,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919840309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:35,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548176358] [2021-06-05 21:25:35,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:35,691 INFO L87 Difference]: Start difference. First operand 5812 states and 19334 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:35,869 INFO L93 Difference]: Finished difference Result 6089 states and 19769 transitions. [2021-06-05 21:25:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:25:35,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:35,876 INFO L225 Difference]: With dead ends: 6089 [2021-06-05 21:25:35,877 INFO L226 Difference]: Without dead ends: 6085 [2021-06-05 21:25:35,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:25:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-06-05 21:25:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5545. [2021-06-05 21:25:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5544 states have (on average 3.3145743145743145) internal successors, (18376), 5544 states have internal predecessors, (18376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 18376 transitions. [2021-06-05 21:25:35,978 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 18376 transitions. Word has length 20 [2021-06-05 21:25:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:35,978 INFO L482 AbstractCegarLoop]: Abstraction has 5545 states and 18376 transitions. [2021-06-05 21:25:35,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 18376 transitions. [2021-06-05 21:25:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:35,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:35,982 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:36,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3076,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:36,182 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 92516544, now seen corresponding path program 122 times [2021-06-05 21:25:36,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:36,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115833035] [2021-06-05 21:25:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:36,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:36,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115833035] [2021-06-05 21:25:36,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115833035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487428315] [2021-06-05 21:25:36,242 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 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 21:25:36,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:36,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:36,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487428315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:36,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:36,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022693459] [2021-06-05 21:25:36,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:36,309 INFO L87 Difference]: Start difference. First operand 5545 states and 18376 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:36,503 INFO L93 Difference]: Finished difference Result 7476 states and 23877 transitions. [2021-06-05 21:25:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:36,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:36,514 INFO L225 Difference]: With dead ends: 7476 [2021-06-05 21:25:36,514 INFO L226 Difference]: Without dead ends: 7476 [2021-06-05 21:25:36,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:25:36,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-05 21:25:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6757. [2021-06-05 21:25:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 3.312314979277679) internal successors, (22378), 6756 states have internal predecessors, (22378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 22378 transitions. [2021-06-05 21:25:36,602 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 22378 transitions. Word has length 20 [2021-06-05 21:25:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:36,602 INFO L482 AbstractCegarLoop]: Abstraction has 6757 states and 22378 transitions. [2021-06-05 21:25:36,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 22378 transitions. [2021-06-05 21:25:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:36,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:36,606 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:36,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-06-05 21:25:36,807 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1174940634, now seen corresponding path program 123 times [2021-06-05 21:25:36,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:36,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842532129] [2021-06-05 21:25:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:36,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:36,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842532129] [2021-06-05 21:25:36,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842532129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170975097] [2021-06-05 21:25:36,869 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 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 21:25:36,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170975097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:36,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210052841] [2021-06-05 21:25:36,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:36,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:36,955 INFO L87 Difference]: Start difference. First operand 6757 states and 22378 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:37,157 INFO L93 Difference]: Finished difference Result 7967 states and 25615 transitions. [2021-06-05 21:25:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:37,167 INFO L225 Difference]: With dead ends: 7967 [2021-06-05 21:25:37,168 INFO L226 Difference]: Without dead ends: 7967 [2021-06-05 21:25:37,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:25:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2021-06-05 21:25:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 5441. [2021-06-05 21:25:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.2928308823529413) internal successors, (17913), 5440 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 17913 transitions. [2021-06-05 21:25:37,252 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 17913 transitions. Word has length 20 [2021-06-05 21:25:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:37,252 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 17913 transitions. [2021-06-05 21:25:37,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 17913 transitions. [2021-06-05 21:25:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:37,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:37,256 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:37,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 21:25:37,461 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 308194304, now seen corresponding path program 124 times [2021-06-05 21:25:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:37,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030245364] [2021-06-05 21:25:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:37,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030245364] [2021-06-05 21:25:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030245364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896950465] [2021-06-05 21:25:37,521 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 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 21:25:37,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896950465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:37,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:37,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:37,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338675213] [2021-06-05 21:25:37,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:37,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:37,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:37,589 INFO L87 Difference]: Start difference. First operand 5441 states and 17913 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:37,862 INFO L93 Difference]: Finished difference Result 6867 states and 21677 transitions. [2021-06-05 21:25:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:25:37,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:37,875 INFO L225 Difference]: With dead ends: 6867 [2021-06-05 21:25:37,875 INFO L226 Difference]: Without dead ends: 6867 [2021-06-05 21:25:37,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:25:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-06-05 21:25:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5507. [2021-06-05 21:25:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 3.2944061024337086) internal successors, (18139), 5506 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 18139 transitions. [2021-06-05 21:25:37,961 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 18139 transitions. Word has length 20 [2021-06-05 21:25:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:37,961 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 18139 transitions. [2021-06-05 21:25:37,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 18139 transitions. [2021-06-05 21:25:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:37,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:37,966 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:38,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:38,168 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:38,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1811407488, now seen corresponding path program 125 times [2021-06-05 21:25:38,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:38,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362743458] [2021-06-05 21:25:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:38,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:38,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362743458] [2021-06-05 21:25:38,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362743458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:38,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430108787] [2021-06-05 21:25:38,233 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 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 21:25:38,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:25:38,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:38,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430108787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:38,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:38,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:38,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936948265] [2021-06-05 21:25:38,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:38,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:38,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:38,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:38,332 INFO L87 Difference]: Start difference. First operand 5507 states and 18139 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:38,514 INFO L93 Difference]: Finished difference Result 6222 states and 19873 transitions. [2021-06-05 21:25:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:25:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:38,527 INFO L225 Difference]: With dead ends: 6222 [2021-06-05 21:25:38,527 INFO L226 Difference]: Without dead ends: 6222 [2021-06-05 21:25:38,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:25:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-06-05 21:25:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5437. [2021-06-05 21:25:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 3.3015084621044886) internal successors, (17947), 5436 states have internal predecessors, (17947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 17947 transitions. [2021-06-05 21:25:38,634 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 17947 transitions. Word has length 20 [2021-06-05 21:25:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:38,635 INFO L482 AbstractCegarLoop]: Abstraction has 5437 states and 17947 transitions. [2021-06-05 21:25:38,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 17947 transitions. [2021-06-05 21:25:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:38,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:38,640 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:38,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3080,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:38,857 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash -328272550, now seen corresponding path program 126 times [2021-06-05 21:25:38,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:38,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073631544] [2021-06-05 21:25:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:38,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:38,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073631544] [2021-06-05 21:25:38,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073631544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:38,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196317231] [2021-06-05 21:25:38,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:25:38,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:25:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:38,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:39,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196317231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:39,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:39,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:39,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271103019] [2021-06-05 21:25:39,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:39,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:39,017 INFO L87 Difference]: Start difference. First operand 5437 states and 17947 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:39,263 INFO L93 Difference]: Finished difference Result 5885 states and 18864 transitions. [2021-06-05 21:25:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:25:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:39,273 INFO L225 Difference]: With dead ends: 5885 [2021-06-05 21:25:39,273 INFO L226 Difference]: Without dead ends: 5885 [2021-06-05 21:25:39,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:25:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-06-05 21:25:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5474. [2021-06-05 21:25:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.3012972775443084) internal successors, (18068), 5473 states have internal predecessors, (18068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18068 transitions. [2021-06-05 21:25:39,349 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18068 transitions. Word has length 20 [2021-06-05 21:25:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:39,349 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18068 transitions. [2021-06-05 21:25:39,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18068 transitions. [2021-06-05 21:25:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:39,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:39,353 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:39,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3081 [2021-06-05 21:25:39,554 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1595729728, now seen corresponding path program 127 times [2021-06-05 21:25:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:39,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424813177] [2021-06-05 21:25:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:39,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:39,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424813177] [2021-06-05 21:25:39,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424813177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:39,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625207497] [2021-06-05 21:25:39,627 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 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 21:25:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:39,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625207497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:39,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:39,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:39,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387178235] [2021-06-05 21:25:39,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:39,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:39,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:39,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:39,712 INFO L87 Difference]: Start difference. First operand 5474 states and 18068 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:39,988 INFO L93 Difference]: Finished difference Result 6017 states and 19173 transitions. [2021-06-05 21:25:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:25:39,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:39,995 INFO L225 Difference]: With dead ends: 6017 [2021-06-05 21:25:39,995 INFO L226 Difference]: Without dead ends: 6017 [2021-06-05 21:25:39,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:25:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2021-06-05 21:25:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5473. [2021-06-05 21:25:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 3.30171783625731) internal successors, (18067), 5472 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 18067 transitions. [2021-06-05 21:25:40,061 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 18067 transitions. Word has length 20 [2021-06-05 21:25:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:40,061 INFO L482 AbstractCegarLoop]: Abstraction has 5473 states and 18067 transitions. [2021-06-05 21:25:40,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 18067 transitions. [2021-06-05 21:25:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:40,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:40,065 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:40,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-06-05 21:25:40,265 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2112133432, now seen corresponding path program 128 times [2021-06-05 21:25:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:40,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072370900] [2021-06-05 21:25:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:40,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:40,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072370900] [2021-06-05 21:25:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072370900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:40,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489079287] [2021-06-05 21:25:40,356 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 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 21:25:40,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:40,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:40,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:40,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489079287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:40,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:40,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:40,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518165356] [2021-06-05 21:25:40,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:40,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:40,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:40,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:40,411 INFO L87 Difference]: Start difference. First operand 5473 states and 18067 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:40,553 INFO L93 Difference]: Finished difference Result 5764 states and 18581 transitions. [2021-06-05 21:25:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:40,563 INFO L225 Difference]: With dead ends: 5764 [2021-06-05 21:25:40,563 INFO L226 Difference]: Without dead ends: 5760 [2021-06-05 21:25:40,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-06-05 21:25:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 5552. [2021-06-05 21:25:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 3.301747432894974) internal successors, (18328), 5551 states have internal predecessors, (18328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 18328 transitions. [2021-06-05 21:25:40,630 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 18328 transitions. Word has length 20 [2021-06-05 21:25:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:40,630 INFO L482 AbstractCegarLoop]: Abstraction has 5552 states and 18328 transitions. [2021-06-05 21:25:40,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 18328 transitions. [2021-06-05 21:25:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:40,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:40,633 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:40,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3083 [2021-06-05 21:25:40,834 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash -603612954, now seen corresponding path program 129 times [2021-06-05 21:25:40,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:40,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480286149] [2021-06-05 21:25:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:40,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480286149] [2021-06-05 21:25:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480286149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176968] [2021-06-05 21:25:40,885 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 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 21:25:40,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:40,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:40,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:40,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:40,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:40,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:40,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101050051] [2021-06-05 21:25:40,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:40,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:40,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:40,944 INFO L87 Difference]: Start difference. First operand 5552 states and 18328 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:41,027 INFO L93 Difference]: Finished difference Result 5872 states and 18869 transitions. [2021-06-05 21:25:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:41,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:41,035 INFO L225 Difference]: With dead ends: 5872 [2021-06-05 21:25:41,035 INFO L226 Difference]: Without dead ends: 5872 [2021-06-05 21:25:41,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:25:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-06-05 21:25:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5560. [2021-06-05 21:25:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 3.300593631948192) internal successors, (18348), 5559 states have internal predecessors, (18348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 18348 transitions. [2021-06-05 21:25:41,118 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 18348 transitions. Word has length 20 [2021-06-05 21:25:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:41,118 INFO L482 AbstractCegarLoop]: Abstraction has 5560 states and 18348 transitions. [2021-06-05 21:25:41,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 18348 transitions. [2021-06-05 21:25:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:41,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:41,122 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:41,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:41,323 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1962307008, now seen corresponding path program 130 times [2021-06-05 21:25:41,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:41,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588335448] [2021-06-05 21:25:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:41,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:41,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588335448] [2021-06-05 21:25:41,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588335448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:41,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816484067] [2021-06-05 21:25:41,372 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 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 21:25:41,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:41,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:41,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816484067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:41,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:41,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:41,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462631198] [2021-06-05 21:25:41,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:41,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:41,437 INFO L87 Difference]: Start difference. First operand 5560 states and 18348 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:41,540 INFO L93 Difference]: Finished difference Result 5951 states and 19077 transitions. [2021-06-05 21:25:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:41,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:41,547 INFO L225 Difference]: With dead ends: 5951 [2021-06-05 21:25:41,547 INFO L226 Difference]: Without dead ends: 5951 [2021-06-05 21:25:41,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-05 21:25:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5587. [2021-06-05 21:25:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 3.2986036519871105) internal successors, (18426), 5586 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 18426 transitions. [2021-06-05 21:25:41,613 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 18426 transitions. Word has length 20 [2021-06-05 21:25:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:41,613 INFO L482 AbstractCegarLoop]: Abstraction has 5587 states and 18426 transitions. [2021-06-05 21:25:41,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 18426 transitions. [2021-06-05 21:25:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:41,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:41,617 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:41,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 21:25:41,818 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash -98552794, now seen corresponding path program 131 times [2021-06-05 21:25:41,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:41,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624259352] [2021-06-05 21:25:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:41,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624259352] [2021-06-05 21:25:41,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624259352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940318509] [2021-06-05 21:25:41,866 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 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 21:25:41,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:41,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:41,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:41,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940318509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:41,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:41,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:41,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656464343] [2021-06-05 21:25:41,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:41,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:41,931 INFO L87 Difference]: Start difference. First operand 5587 states and 18426 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:42,028 INFO L93 Difference]: Finished difference Result 7442 states and 23969 transitions. [2021-06-05 21:25:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:42,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:42,035 INFO L225 Difference]: With dead ends: 7442 [2021-06-05 21:25:42,036 INFO L226 Difference]: Without dead ends: 7442 [2021-06-05 21:25:42,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:25:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2021-06-05 21:25:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7001. [2021-06-05 21:25:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 3.3085714285714287) internal successors, (23160), 7000 states have internal predecessors, (23160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 23160 transitions. [2021-06-05 21:25:42,119 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 23160 transitions. Word has length 20 [2021-06-05 21:25:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:42,119 INFO L482 AbstractCegarLoop]: Abstraction has 7001 states and 23160 transitions. [2021-06-05 21:25:42,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 23160 transitions. [2021-06-05 21:25:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:42,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:42,123 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:42,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3086 [2021-06-05 21:25:42,331 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:42,332 INFO L82 PathProgramCache]: Analyzing trace with hash 439302784, now seen corresponding path program 132 times [2021-06-05 21:25:42,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:42,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070894500] [2021-06-05 21:25:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:42,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:42,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070894500] [2021-06-05 21:25:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070894500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:42,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314689429] [2021-06-05 21:25:42,393 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 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 21:25:42,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:42,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314689429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:42,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:42,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:42,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814724916] [2021-06-05 21:25:42,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:42,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:42,458 INFO L87 Difference]: Start difference. First operand 7001 states and 23160 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:42,540 INFO L93 Difference]: Finished difference Result 7460 states and 24267 transitions. [2021-06-05 21:25:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:25:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:42,549 INFO L225 Difference]: With dead ends: 7460 [2021-06-05 21:25:42,549 INFO L226 Difference]: Without dead ends: 7460 [2021-06-05 21:25:42,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-06-05 21:25:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7283. [2021-06-05 21:25:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.300466904696512) internal successors, (24034), 7282 states have internal predecessors, (24034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24034 transitions. [2021-06-05 21:25:42,636 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24034 transitions. Word has length 20 [2021-06-05 21:25:42,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:42,636 INFO L482 AbstractCegarLoop]: Abstraction has 7283 states and 24034 transitions. [2021-06-05 21:25:42,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24034 transitions. [2021-06-05 21:25:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:42,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:42,640 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:42,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 21:25:42,841 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:42,841 INFO L82 PathProgramCache]: Analyzing trace with hash -67043482, now seen corresponding path program 133 times [2021-06-05 21:25:42,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:42,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429001133] [2021-06-05 21:25:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:42,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:42,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429001133] [2021-06-05 21:25:42,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429001133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:42,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043822625] [2021-06-05 21:25:42,901 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 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 21:25:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043822625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:42,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:42,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:42,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513463994] [2021-06-05 21:25:42,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:42,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:42,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:42,963 INFO L87 Difference]: Start difference. First operand 7283 states and 24034 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:43,089 INFO L93 Difference]: Finished difference Result 7550 states and 24471 transitions. [2021-06-05 21:25:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:43,098 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 21:25:43,098 INFO L226 Difference]: Without dead ends: 7550 [2021-06-05 21:25:43,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-06-05 21:25:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7283. [2021-06-05 21:25:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.3001922548750344) internal successors, (24032), 7282 states have internal predecessors, (24032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24032 transitions. [2021-06-05 21:25:43,193 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24032 transitions. Word has length 20 [2021-06-05 21:25:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:43,193 INFO L482 AbstractCegarLoop]: Abstraction has 7283 states and 24032 transitions. [2021-06-05 21:25:43,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24032 transitions. [2021-06-05 21:25:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:43,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:43,197 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:43,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-06-05 21:25:43,398 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1416091456, now seen corresponding path program 134 times [2021-06-05 21:25:43,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:43,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784355447] [2021-06-05 21:25:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:43,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784355447] [2021-06-05 21:25:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784355447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729279178] [2021-06-05 21:25:43,458 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:43,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:43,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:43,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:43,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729279178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:43,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:43,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732998505] [2021-06-05 21:25:43,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:43,522 INFO L87 Difference]: Start difference. First operand 7283 states and 24032 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:43,679 INFO L93 Difference]: Finished difference Result 7595 states and 24674 transitions. [2021-06-05 21:25:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:43,687 INFO L225 Difference]: With dead ends: 7595 [2021-06-05 21:25:43,687 INFO L226 Difference]: Without dead ends: 7595 [2021-06-05 21:25:43,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:25:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7595 states. [2021-06-05 21:25:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7595 to 7376. [2021-06-05 21:25:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.296677966101695) internal successors, (24313), 7375 states have internal predecessors, (24313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24313 transitions. [2021-06-05 21:25:43,772 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24313 transitions. Word has length 20 [2021-06-05 21:25:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:43,772 INFO L482 AbstractCegarLoop]: Abstraction has 7376 states and 24313 transitions. [2021-06-05 21:25:43,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24313 transitions. [2021-06-05 21:25:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:43,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:43,816 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:44,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-05 21:25:44,016 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash 148634278, now seen corresponding path program 135 times [2021-06-05 21:25:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:44,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822394475] [2021-06-05 21:25:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:44,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822394475] [2021-06-05 21:25:44,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822394475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119261477] [2021-06-05 21:25:44,079 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:44,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:44,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:44,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119261477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:44,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:44,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643859087] [2021-06-05 21:25:44,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:44,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:44,144 INFO L87 Difference]: Start difference. First operand 7376 states and 24313 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:44,360 INFO L93 Difference]: Finished difference Result 7693 states and 24913 transitions. [2021-06-05 21:25:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:25:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:44,369 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 21:25:44,370 INFO L226 Difference]: Without dead ends: 7693 [2021-06-05 21:25:44,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:25:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-06-05 21:25:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7412. [2021-06-05 21:25:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 3.295236810147079) internal successors, (24421), 7411 states have internal predecessors, (24421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 24421 transitions. [2021-06-05 21:25:44,465 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 24421 transitions. Word has length 20 [2021-06-05 21:25:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:44,465 INFO L482 AbstractCegarLoop]: Abstraction has 7412 states and 24421 transitions. [2021-06-05 21:25:44,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 24421 transitions. [2021-06-05 21:25:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:44,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:44,470 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:44,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3090,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:44,670 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:44,671 INFO L82 PathProgramCache]: Analyzing trace with hash -487832576, now seen corresponding path program 136 times [2021-06-05 21:25:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:44,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136458766] [2021-06-05 21:25:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:44,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136458766] [2021-06-05 21:25:44,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136458766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900723801] [2021-06-05 21:25:44,736 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:44,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:44,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:44,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900723801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:44,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:44,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:44,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288960095] [2021-06-05 21:25:44,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:44,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:44,800 INFO L87 Difference]: Start difference. First operand 7412 states and 24421 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:45,070 INFO L93 Difference]: Finished difference Result 7927 states and 25571 transitions. [2021-06-05 21:25:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:25:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:45,079 INFO L225 Difference]: With dead ends: 7927 [2021-06-05 21:25:45,080 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 21:25:45,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:25:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 21:25:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7453. [2021-06-05 21:25:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.293612453032743) internal successors, (24544), 7452 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 24544 transitions. [2021-06-05 21:25:45,175 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 24544 transitions. Word has length 20 [2021-06-05 21:25:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:45,175 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 24544 transitions. [2021-06-05 21:25:45,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 24544 transitions. [2021-06-05 21:25:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:45,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:45,179 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:45,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3091 [2021-06-05 21:25:45,379 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:45,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1164507080, now seen corresponding path program 137 times [2021-06-05 21:25:45,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:45,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734519587] [2021-06-05 21:25:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:45,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734519587] [2021-06-05 21:25:45,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734519587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912179709] [2021-06-05 21:25:45,448 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:45,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:45,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912179709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:45,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:45,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:45,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231993755] [2021-06-05 21:25:45,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:45,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:45,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:45,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:45,514 INFO L87 Difference]: Start difference. First operand 7453 states and 24544 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:45,726 INFO L93 Difference]: Finished difference Result 7682 states and 24832 transitions. [2021-06-05 21:25:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:25:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:45,736 INFO L225 Difference]: With dead ends: 7682 [2021-06-05 21:25:45,736 INFO L226 Difference]: Without dead ends: 7678 [2021-06-05 21:25:45,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:25:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-06-05 21:25:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7414. [2021-06-05 21:25:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 3.2917847025495752) internal successors, (24402), 7413 states have internal predecessors, (24402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 24402 transitions. [2021-06-05 21:25:45,834 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 24402 transitions. Word has length 20 [2021-06-05 21:25:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:45,834 INFO L482 AbstractCegarLoop]: Abstraction has 7414 states and 24402 transitions. [2021-06-05 21:25:45,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 24402 transitions. [2021-06-05 21:25:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:45,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:45,838 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:46,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3092,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:46,039 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:46,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:46,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1963013832, now seen corresponding path program 138 times [2021-06-05 21:25:46,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:46,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270610353] [2021-06-05 21:25:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:46,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270610353] [2021-06-05 21:25:46,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270610353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395207508] [2021-06-05 21:25:46,103 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:46,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:25:46,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:46,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:46,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395207508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:46,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:46,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:46,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275619413] [2021-06-05 21:25:46,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:46,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:46,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:46,171 INFO L87 Difference]: Start difference. First operand 7414 states and 24402 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:46,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:46,427 INFO L93 Difference]: Finished difference Result 9451 states and 30109 transitions. [2021-06-05 21:25:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:25:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:46,442 INFO L225 Difference]: With dead ends: 9451 [2021-06-05 21:25:46,443 INFO L226 Difference]: Without dead ends: 9451 [2021-06-05 21:25:46,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:25:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2021-06-05 21:25:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 7875. [2021-06-05 21:25:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 3.276987553975108) internal successors, (25803), 7874 states have internal predecessors, (25803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 25803 transitions. [2021-06-05 21:25:46,555 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 25803 transitions. Word has length 20 [2021-06-05 21:25:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:46,555 INFO L482 AbstractCegarLoop]: Abstraction has 7875 states and 25803 transitions. [2021-06-05 21:25:46,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 25803 transitions. [2021-06-05 21:25:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:46,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:46,560 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:46,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3093 [2021-06-05 21:25:46,760 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1695486610, now seen corresponding path program 139 times [2021-06-05 21:25:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111961347] [2021-06-05 21:25:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:46,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:46,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111961347] [2021-06-05 21:25:46,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111961347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:46,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548663019] [2021-06-05 21:25:46,827 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:46,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548663019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:46,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:46,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:46,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027198469] [2021-06-05 21:25:46,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:46,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:46,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:46,894 INFO L87 Difference]: Start difference. First operand 7875 states and 25803 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:47,118 INFO L93 Difference]: Finished difference Result 8447 states and 27068 transitions. [2021-06-05 21:25:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:25:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:47,129 INFO L225 Difference]: With dead ends: 8447 [2021-06-05 21:25:47,129 INFO L226 Difference]: Without dead ends: 8447 [2021-06-05 21:25:47,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:25:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2021-06-05 21:25:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 7839. [2021-06-05 21:25:47,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 3.280556264353151) internal successors, (25713), 7838 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 25713 transitions. [2021-06-05 21:25:47,241 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 25713 transitions. Word has length 20 [2021-06-05 21:25:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:47,241 INFO L482 AbstractCegarLoop]: Abstraction has 7839 states and 25713 transitions. [2021-06-05 21:25:47,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 25713 transitions. [2021-06-05 21:25:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:47,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:47,246 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:47,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:47,447 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash 428029432, now seen corresponding path program 140 times [2021-06-05 21:25:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:47,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019998098] [2021-06-05 21:25:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:47,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019998098] [2021-06-05 21:25:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019998098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661762030] [2021-06-05 21:25:47,521 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:47,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:47,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:47,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:47,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:47,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661762030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:47,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:47,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:47,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294664471] [2021-06-05 21:25:47,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:47,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:47,633 INFO L87 Difference]: Start difference. First operand 7839 states and 25713 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:47,929 INFO L93 Difference]: Finished difference Result 8546 states and 27359 transitions. [2021-06-05 21:25:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:25:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:47,940 INFO L225 Difference]: With dead ends: 8546 [2021-06-05 21:25:47,940 INFO L226 Difference]: Without dead ends: 8546 [2021-06-05 21:25:47,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:25:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2021-06-05 21:25:48,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7853. [2021-06-05 21:25:48,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7853 states, 7852 states have (on average 3.281074885379521) internal successors, (25763), 7852 states have internal predecessors, (25763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 25763 transitions. [2021-06-05 21:25:48,041 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 25763 transitions. Word has length 20 [2021-06-05 21:25:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:48,041 INFO L482 AbstractCegarLoop]: Abstraction has 7853 states and 25763 transitions. [2021-06-05 21:25:48,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 25763 transitions. [2021-06-05 21:25:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:48,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:48,045 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:48,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-06-05 21:25:48,246 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash -855116680, now seen corresponding path program 141 times [2021-06-05 21:25:48,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:48,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732599283] [2021-06-05 21:25:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:48,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732599283] [2021-06-05 21:25:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732599283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538160617] [2021-06-05 21:25:48,307 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:48,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:25:48,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:48,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538160617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:48,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:48,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:48,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207055491] [2021-06-05 21:25:48,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:48,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:48,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:48,401 INFO L87 Difference]: Start difference. First operand 7853 states and 25763 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:48,631 INFO L93 Difference]: Finished difference Result 8149 states and 26291 transitions. [2021-06-05 21:25:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:25:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:48,660 INFO L225 Difference]: With dead ends: 8149 [2021-06-05 21:25:48,660 INFO L226 Difference]: Without dead ends: 8149 [2021-06-05 21:25:48,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:25:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-06-05 21:25:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 7829. [2021-06-05 21:25:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 3.281936637710782) internal successors, (25691), 7828 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 25691 transitions. [2021-06-05 21:25:48,761 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 25691 transitions. Word has length 20 [2021-06-05 21:25:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:48,761 INFO L482 AbstractCegarLoop]: Abstraction has 7829 states and 25691 transitions. [2021-06-05 21:25:48,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 25691 transitions. [2021-06-05 21:25:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:48,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:48,766 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:48,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-06-05 21:25:48,967 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:48,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2122573858, now seen corresponding path program 142 times [2021-06-05 21:25:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:48,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972027284] [2021-06-05 21:25:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:49,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:49,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972027284] [2021-06-05 21:25:49,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972027284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:49,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30374073] [2021-06-05 21:25:49,043 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:49,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30374073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:49,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:49,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725450130] [2021-06-05 21:25:49,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:49,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:49,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:49,108 INFO L87 Difference]: Start difference. First operand 7829 states and 25691 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:49,346 INFO L93 Difference]: Finished difference Result 8079 states and 26147 transitions. [2021-06-05 21:25:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:25:49,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:49,358 INFO L225 Difference]: With dead ends: 8079 [2021-06-05 21:25:49,358 INFO L226 Difference]: Without dead ends: 8079 [2021-06-05 21:25:49,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:25:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-06-05 21:25:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7824. [2021-06-05 21:25:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 3.2821168349737952) internal successors, (25676), 7823 states have internal predecessors, (25676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 25676 transitions. [2021-06-05 21:25:49,455 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 25676 transitions. Word has length 20 [2021-06-05 21:25:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:49,455 INFO L482 AbstractCegarLoop]: Abstraction has 7824 states and 25676 transitions. [2021-06-05 21:25:49,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 25676 transitions. [2021-06-05 21:25:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:49,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:49,460 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:49,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3097 [2021-06-05 21:25:49,661 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1535926584, now seen corresponding path program 143 times [2021-06-05 21:25:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:49,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362295285] [2021-06-05 21:25:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:49,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:49,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362295285] [2021-06-05 21:25:49,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362295285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:49,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523269898] [2021-06-05 21:25:49,731 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:49,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:25:49,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:49,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:49,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:49,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523269898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:49,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:49,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676941639] [2021-06-05 21:25:49,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:49,799 INFO L87 Difference]: Start difference. First operand 7824 states and 25676 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:50,088 INFO L93 Difference]: Finished difference Result 8238 states and 26604 transitions. [2021-06-05 21:25:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:25:50,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:50,098 INFO L225 Difference]: With dead ends: 8238 [2021-06-05 21:25:50,098 INFO L226 Difference]: Without dead ends: 8238 [2021-06-05 21:25:50,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:25:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-06-05 21:25:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7821. [2021-06-05 21:25:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 7820 states have (on average 3.282225063938619) internal successors, (25667), 7820 states have internal predecessors, (25667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 25667 transitions. [2021-06-05 21:25:50,195 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 25667 transitions. Word has length 20 [2021-06-05 21:25:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:50,195 INFO L482 AbstractCegarLoop]: Abstraction has 7821 states and 25667 transitions. [2021-06-05 21:25:50,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 25667 transitions. [2021-06-05 21:25:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:50,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:50,200 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:50,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3098 [2021-06-05 21:25:50,401 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:50,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1918365366, now seen corresponding path program 144 times [2021-06-05 21:25:50,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:50,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71992247] [2021-06-05 21:25:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:50,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:50,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71992247] [2021-06-05 21:25:50,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71992247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:50,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583747202] [2021-06-05 21:25:50,452 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:50,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:25:50,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:50,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583747202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:50,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:50,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:50,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557024068] [2021-06-05 21:25:50,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:50,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:50,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:50,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:50,510 INFO L87 Difference]: Start difference. First operand 7821 states and 25667 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:50,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:50,664 INFO L93 Difference]: Finished difference Result 8648 states and 28004 transitions. [2021-06-05 21:25:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:50,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:50,675 INFO L225 Difference]: With dead ends: 8648 [2021-06-05 21:25:50,675 INFO L226 Difference]: Without dead ends: 8646 [2021-06-05 21:25:50,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-06-05 21:25:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8471. [2021-06-05 21:25:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.282880755608028) internal successors, (27806), 8470 states have internal predecessors, (27806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 27806 transitions. [2021-06-05 21:25:50,789 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 27806 transitions. Word has length 20 [2021-06-05 21:25:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:50,789 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 27806 transitions. [2021-06-05 21:25:50,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 27806 transitions. [2021-06-05 21:25:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:50,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:50,794 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:50,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-06-05 21:25:50,996 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:50,996 INFO L82 PathProgramCache]: Analyzing trace with hash -339144456, now seen corresponding path program 145 times [2021-06-05 21:25:50,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:50,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655374196] [2021-06-05 21:25:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:51,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:51,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655374196] [2021-06-05 21:25:51,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655374196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:51,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107338935] [2021-06-05 21:25:51,047 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:51,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107338935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:51,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:51,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:51,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857333674] [2021-06-05 21:25:51,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:51,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:51,106 INFO L87 Difference]: Start difference. First operand 8471 states and 27806 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:51,225 INFO L93 Difference]: Finished difference Result 8734 states and 28233 transitions. [2021-06-05 21:25:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:25:51,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:51,235 INFO L225 Difference]: With dead ends: 8734 [2021-06-05 21:25:51,235 INFO L226 Difference]: Without dead ends: 8734 [2021-06-05 21:25:51,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8734 states. [2021-06-05 21:25:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8734 to 8472. [2021-06-05 21:25:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8472 states, 8471 states have (on average 3.282611261952544) internal successors, (27807), 8471 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8472 states to 8472 states and 27807 transitions. [2021-06-05 21:25:51,340 INFO L78 Accepts]: Start accepts. Automaton has 8472 states and 27807 transitions. Word has length 20 [2021-06-05 21:25:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:51,340 INFO L482 AbstractCegarLoop]: Abstraction has 8472 states and 27807 transitions. [2021-06-05 21:25:51,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8472 states and 27807 transitions. [2021-06-05 21:25:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:51,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:51,344 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:51,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3100 [2021-06-05 21:25:51,545 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2068191790, now seen corresponding path program 146 times [2021-06-05 21:25:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:51,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017528564] [2021-06-05 21:25:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:51,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:51,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017528564] [2021-06-05 21:25:51,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017528564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924736931] [2021-06-05 21:25:51,603 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:51,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:51,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:51,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924736931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:51,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:51,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:51,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343960510] [2021-06-05 21:25:51,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:51,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:51,668 INFO L87 Difference]: Start difference. First operand 8472 states and 27807 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:51,792 INFO L93 Difference]: Finished difference Result 8819 states and 28448 transitions. [2021-06-05 21:25:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:51,804 INFO L225 Difference]: With dead ends: 8819 [2021-06-05 21:25:51,805 INFO L226 Difference]: Without dead ends: 8819 [2021-06-05 21:25:51,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-06-05 21:25:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8488. [2021-06-05 21:25:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 8487 states have (on average 3.2818428184281845) internal successors, (27853), 8487 states have internal predecessors, (27853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 27853 transitions. [2021-06-05 21:25:51,914 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 27853 transitions. Word has length 20 [2021-06-05 21:25:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:51,914 INFO L482 AbstractCegarLoop]: Abstraction has 8488 states and 27853 transitions. [2021-06-05 21:25:51,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 27853 transitions. [2021-06-05 21:25:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:51,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:51,925 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:52,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:52,148 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:52,148 INFO L82 PathProgramCache]: Analyzing trace with hash 165915704, now seen corresponding path program 147 times [2021-06-05 21:25:52,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:52,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641206071] [2021-06-05 21:25:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:52,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:52,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641206071] [2021-06-05 21:25:52,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641206071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463318851] [2021-06-05 21:25:52,199 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:52,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:52,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:52,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463318851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:52,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:52,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:52,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429751757] [2021-06-05 21:25:52,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:52,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:52,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:52,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:52,272 INFO L87 Difference]: Start difference. First operand 8488 states and 27853 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:52,408 INFO L93 Difference]: Finished difference Result 10243 states and 33004 transitions. [2021-06-05 21:25:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:25:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:52,420 INFO L225 Difference]: With dead ends: 10243 [2021-06-05 21:25:52,420 INFO L226 Difference]: Without dead ends: 10243 [2021-06-05 21:25:52,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:25:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-06-05 21:25:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9399. [2021-06-05 21:25:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.282932538838051) internal successors, (30853), 9398 states have internal predecessors, (30853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 30853 transitions. [2021-06-05 21:25:52,543 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 30853 transitions. Word has length 20 [2021-06-05 21:25:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:52,543 INFO L482 AbstractCegarLoop]: Abstraction has 9399 states and 30853 transitions. [2021-06-05 21:25:52,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 30853 transitions. [2021-06-05 21:25:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:52,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:52,548 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:52,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:52,748 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash 703771282, now seen corresponding path program 148 times [2021-06-05 21:25:52,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:52,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164841698] [2021-06-05 21:25:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:52,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:52,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164841698] [2021-06-05 21:25:52,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164841698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:52,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521018399] [2021-06-05 21:25:52,804 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:52,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:52,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:52,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521018399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:52,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:52,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436551477] [2021-06-05 21:25:52,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:52,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:52,882 INFO L87 Difference]: Start difference. First operand 9399 states and 30853 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:53,006 INFO L93 Difference]: Finished difference Result 10149 states and 32809 transitions. [2021-06-05 21:25:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:25:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:53,018 INFO L225 Difference]: With dead ends: 10149 [2021-06-05 21:25:53,018 INFO L226 Difference]: Without dead ends: 10149 [2021-06-05 21:25:53,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:25:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-06-05 21:25:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 9884. [2021-06-05 21:25:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9884 states, 9883 states have (on average 3.274208236365476) internal successors, (32359), 9883 states have internal predecessors, (32359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 32359 transitions. [2021-06-05 21:25:53,136 INFO L78 Accepts]: Start accepts. Automaton has 9884 states and 32359 transitions. Word has length 20 [2021-06-05 21:25:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:53,136 INFO L482 AbstractCegarLoop]: Abstraction has 9884 states and 32359 transitions. [2021-06-05 21:25:53,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 9884 states and 32359 transitions. [2021-06-05 21:25:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:53,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:53,141 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:53,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3103 [2021-06-05 21:25:53,342 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash 197425016, now seen corresponding path program 149 times [2021-06-05 21:25:53,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:53,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747991092] [2021-06-05 21:25:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:53,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:53,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747991092] [2021-06-05 21:25:53,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747991092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:53,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914410544] [2021-06-05 21:25:53,401 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:53,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:25:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914410544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:53,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:53,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:25:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870506562] [2021-06-05 21:25:53,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:53,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:53,475 INFO L87 Difference]: Start difference. First operand 9884 states and 32359 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:53,563 INFO L93 Difference]: Finished difference Result 10072 states and 32751 transitions. [2021-06-05 21:25:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:25:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:53,575 INFO L225 Difference]: With dead ends: 10072 [2021-06-05 21:25:53,575 INFO L226 Difference]: Without dead ends: 10072 [2021-06-05 21:25:53,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-06-05 21:25:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9967. [2021-06-05 21:25:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 3.2728276138872165) internal successors, (32617), 9966 states have internal predecessors, (32617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 32617 transitions. [2021-06-05 21:25:53,697 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 32617 transitions. Word has length 20 [2021-06-05 21:25:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:53,697 INFO L482 AbstractCegarLoop]: Abstraction has 9967 states and 32617 transitions. [2021-06-05 21:25:53,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 32617 transitions. [2021-06-05 21:25:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:53,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:53,702 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:53,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3104,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:53,902 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1680559954, now seen corresponding path program 150 times [2021-06-05 21:25:53,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:53,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551861158] [2021-06-05 21:25:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:53,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:53,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551861158] [2021-06-05 21:25:53,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551861158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:53,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073972920] [2021-06-05 21:25:53,965 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:53,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:25:53,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:53,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:53,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:54,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073972920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:54,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:54,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:54,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278341980] [2021-06-05 21:25:54,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:54,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:54,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:54,032 INFO L87 Difference]: Start difference. First operand 9967 states and 32617 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:54,235 INFO L93 Difference]: Finished difference Result 10101 states and 32808 transitions. [2021-06-05 21:25:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:25:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:54,247 INFO L225 Difference]: With dead ends: 10101 [2021-06-05 21:25:54,247 INFO L226 Difference]: Without dead ends: 10101 [2021-06-05 21:25:54,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:25:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-06-05 21:25:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9954. [2021-06-05 21:25:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 3.2730834924143473) internal successors, (32577), 9953 states have internal predecessors, (32577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 32577 transitions. [2021-06-05 21:25:54,402 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 32577 transitions. Word has length 20 [2021-06-05 21:25:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:54,402 INFO L482 AbstractCegarLoop]: Abstraction has 9954 states and 32577 transitions. [2021-06-05 21:25:54,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 32577 transitions. [2021-06-05 21:25:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:54,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:54,407 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:54,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3105 [2021-06-05 21:25:54,608 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash 413102776, now seen corresponding path program 151 times [2021-06-05 21:25:54,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:54,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871345433] [2021-06-05 21:25:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:54,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871345433] [2021-06-05 21:25:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871345433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560823029] [2021-06-05 21:25:54,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:54,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:54,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560823029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:54,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:54,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:54,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875236254] [2021-06-05 21:25:54,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:54,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:54,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:54,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:54,737 INFO L87 Difference]: Start difference. First operand 9954 states and 32577 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:54,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:54,920 INFO L93 Difference]: Finished difference Result 10116 states and 32868 transitions. [2021-06-05 21:25:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:25:54,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:54,932 INFO L225 Difference]: With dead ends: 10116 [2021-06-05 21:25:54,933 INFO L226 Difference]: Without dead ends: 10116 [2021-06-05 21:25:54,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:25:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-06-05 21:25:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9959. [2021-06-05 21:25:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 3.272845953002611) internal successors, (32591), 9958 states have internal predecessors, (32591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 32591 transitions. [2021-06-05 21:25:55,066 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 32591 transitions. Word has length 20 [2021-06-05 21:25:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:55,066 INFO L482 AbstractCegarLoop]: Abstraction has 9959 states and 32591 transitions. [2021-06-05 21:25:55,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 32591 transitions. [2021-06-05 21:25:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:55,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:55,072 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:55,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3106,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:55,272 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash -223364078, now seen corresponding path program 152 times [2021-06-05 21:25:55,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:55,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653465784] [2021-06-05 21:25:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:55,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:55,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653465784] [2021-06-05 21:25:55,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653465784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:55,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837019482] [2021-06-05 21:25:55,349 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:55,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:55,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:55,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837019482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:55,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:55,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:55,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145777320] [2021-06-05 21:25:55,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:55,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:55,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:55,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:55,413 INFO L87 Difference]: Start difference. First operand 9959 states and 32591 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:55,625 INFO L93 Difference]: Finished difference Result 10234 states and 33185 transitions. [2021-06-05 21:25:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:25:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:55,639 INFO L225 Difference]: With dead ends: 10234 [2021-06-05 21:25:55,639 INFO L226 Difference]: Without dead ends: 10234 [2021-06-05 21:25:55,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:25:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-06-05 21:25:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 9965. [2021-06-05 21:25:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9965 states, 9964 states have (on average 3.2725812926535527) internal successors, (32608), 9964 states have internal predecessors, (32608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9965 states to 9965 states and 32608 transitions. [2021-06-05 21:25:55,773 INFO L78 Accepts]: Start accepts. Automaton has 9965 states and 32608 transitions. Word has length 20 [2021-06-05 21:25:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:55,773 INFO L482 AbstractCegarLoop]: Abstraction has 9965 states and 32608 transitions. [2021-06-05 21:25:55,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9965 states and 32608 transitions. [2021-06-05 21:25:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:25:55,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:55,778 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:55,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3107,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:55,979 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:55,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1520999928, now seen corresponding path program 153 times [2021-06-05 21:25:55,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:55,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126373996] [2021-06-05 21:25:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:56,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:56,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126373996] [2021-06-05 21:25:56,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126373996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:56,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095742814] [2021-06-05 21:25:56,051 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:56,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:56,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:56,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:56,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:56,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095742814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:56,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:56,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203512007] [2021-06-05 21:25:56,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:56,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:56,118 INFO L87 Difference]: Start difference. First operand 9965 states and 32608 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:56,368 INFO L93 Difference]: Finished difference Result 10435 states and 33779 transitions. [2021-06-05 21:25:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:25:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:25:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:56,380 INFO L225 Difference]: With dead ends: 10435 [2021-06-05 21:25:56,381 INFO L226 Difference]: Without dead ends: 10435 [2021-06-05 21:25:56,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:25:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-06-05 21:25:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 9964. [2021-06-05 21:25:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.274114222623708) internal successors, (32620), 9963 states have internal predecessors, (32620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32620 transitions. [2021-06-05 21:25:56,507 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32620 transitions. Word has length 20 [2021-06-05 21:25:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:56,507 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32620 transitions. [2021-06-05 21:25:56,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32620 transitions. [2021-06-05 21:25:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:56,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:56,512 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:56,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3108 [2021-06-05 21:25:56,713 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:56,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1811260523, now seen corresponding path program 154 times [2021-06-05 21:25:56,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:56,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135186967] [2021-06-05 21:25:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:56,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:56,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135186967] [2021-06-05 21:25:56,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135186967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:56,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789284965] [2021-06-05 21:25:56,773 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:56,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:56,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:56,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:56,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:56,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789284965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:56,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:56,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:25:56,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031187873] [2021-06-05 21:25:56,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:56,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:56,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:56,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:56,833 INFO L87 Difference]: Start difference. First operand 9964 states and 32620 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:25:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:56,999 INFO L93 Difference]: Finished difference Result 10126 states and 32846 transitions. [2021-06-05 21:25:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:25:56,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:25:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:57,012 INFO L225 Difference]: With dead ends: 10126 [2021-06-05 21:25:57,012 INFO L226 Difference]: Without dead ends: 10123 [2021-06-05 21:25:57,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:25:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-06-05 21:25:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 9964. [2021-06-05 21:25:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.273511994379203) internal successors, (32614), 9963 states have internal predecessors, (32614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32614 transitions. [2021-06-05 21:25:57,141 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32614 transitions. Word has length 21 [2021-06-05 21:25:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:57,141 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32614 transitions. [2021-06-05 21:25:57,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:25:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32614 transitions. [2021-06-05 21:25:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:57,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:57,146 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:57,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:57,347 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash 738175143, now seen corresponding path program 155 times [2021-06-05 21:25:57,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:57,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276978081] [2021-06-05 21:25:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:57,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:57,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276978081] [2021-06-05 21:25:57,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276978081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:57,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035906409] [2021-06-05 21:25:57,407 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:57,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:25:57,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:25:57,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:57,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035906409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:57,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:57,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:57,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500938521] [2021-06-05 21:25:57,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:57,472 INFO L87 Difference]: Start difference. First operand 9964 states and 32614 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:57,650 INFO L93 Difference]: Finished difference Result 10176 states and 33094 transitions. [2021-06-05 21:25:57,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:25:57,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:25:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:57,703 INFO L225 Difference]: With dead ends: 10176 [2021-06-05 21:25:57,703 INFO L226 Difference]: Without dead ends: 10172 [2021-06-05 21:25:57,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:25:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-06-05 21:25:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 9964. [2021-06-05 21:25:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.2733112516310348) internal successors, (32612), 9963 states have internal predecessors, (32612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32612 transitions. [2021-06-05 21:25:57,829 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32612 transitions. Word has length 21 [2021-06-05 21:25:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:57,829 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32612 transitions. [2021-06-05 21:25:57,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32612 transitions. [2021-06-05 21:25:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:57,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:57,834 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:58,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3110 [2021-06-05 21:25:58,035 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1832266731, now seen corresponding path program 156 times [2021-06-05 21:25:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:58,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866553336] [2021-06-05 21:25:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:58,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:58,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866553336] [2021-06-05 21:25:58,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866553336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:58,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534631254] [2021-06-05 21:25:58,120 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:58,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:25:58,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:25:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:58,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534631254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:58,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:58,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:25:58,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878959691] [2021-06-05 21:25:58,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:25:58,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:58,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:25:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:25:58,190 INFO L87 Difference]: Start difference. First operand 9964 states and 32612 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:58,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:58,363 INFO L93 Difference]: Finished difference Result 10153 states and 33062 transitions. [2021-06-05 21:25:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:25:58,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:25:58,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:58,376 INFO L225 Difference]: With dead ends: 10153 [2021-06-05 21:25:58,376 INFO L226 Difference]: Without dead ends: 10148 [2021-06-05 21:25:58,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:25:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-06-05 21:25:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9966. [2021-06-05 21:25:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 3.2727546412443553) internal successors, (32613), 9965 states have internal predecessors, (32613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 32613 transitions. [2021-06-05 21:25:58,505 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 32613 transitions. Word has length 21 [2021-06-05 21:25:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:58,506 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 32613 transitions. [2021-06-05 21:25:58,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:58,506 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 32613 transitions. [2021-06-05 21:25:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:58,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:58,511 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:58,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-06-05 21:25:58,711 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash 469064323, now seen corresponding path program 157 times [2021-06-05 21:25:58,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:58,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624648366] [2021-06-05 21:25:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:58,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624648366] [2021-06-05 21:25:58,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624648366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300343959] [2021-06-05 21:25:58,763 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:25:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:25:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300343959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:58,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:58,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:25:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484636328] [2021-06-05 21:25:58,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:25:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:25:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:25:58,825 INFO L87 Difference]: Start difference. First operand 9966 states and 32613 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:58,920 INFO L93 Difference]: Finished difference Result 10154 states and 32869 transitions. [2021-06-05 21:25:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:25:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:58,933 INFO L225 Difference]: With dead ends: 10154 [2021-06-05 21:25:58,933 INFO L226 Difference]: Without dead ends: 10152 [2021-06-05 21:25:58,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:25:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2021-06-05 21:25:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 9957. [2021-06-05 21:25:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 3.2695861791884293) internal successors, (32552), 9956 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 32552 transitions. [2021-06-05 21:25:59,061 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 32552 transitions. Word has length 21 [2021-06-05 21:25:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:59,062 INFO L482 AbstractCegarLoop]: Abstraction has 9957 states and 32552 transitions. [2021-06-05 21:25:59,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 32552 transitions. [2021-06-05 21:25:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:59,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:59,067 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:59,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3112,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:59,268 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:59,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2085810663, now seen corresponding path program 158 times [2021-06-05 21:25:59,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:59,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371602427] [2021-06-05 21:25:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:59,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:59,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371602427] [2021-06-05 21:25:59,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371602427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:59,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401730271] [2021-06-05 21:25:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:59,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:59,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:25:59,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401730271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:59,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:59,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:25:59,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515710380] [2021-06-05 21:25:59,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:59,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:59,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:59,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:59,396 INFO L87 Difference]: Start difference. First operand 9957 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:25:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:59,516 INFO L93 Difference]: Finished difference Result 10120 states and 32729 transitions. [2021-06-05 21:25:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:25:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-06-05 21:25:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:59,529 INFO L225 Difference]: With dead ends: 10120 [2021-06-05 21:25:59,529 INFO L226 Difference]: Without dead ends: 10120 [2021-06-05 21:25:59,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10120 states. [2021-06-05 21:25:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10120 to 9951. [2021-06-05 21:25:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 3.2641206030150753) internal successors, (32478), 9950 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 32478 transitions. [2021-06-05 21:25:59,657 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 32478 transitions. Word has length 21 [2021-06-05 21:25:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:59,657 INFO L482 AbstractCegarLoop]: Abstraction has 9951 states and 32478 transitions. [2021-06-05 21:25:59,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:25:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 32478 transitions. [2021-06-05 21:25:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:59,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:59,662 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:59,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3113,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:59,863 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash -375197355, now seen corresponding path program 159 times [2021-06-05 21:25:59,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:59,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970203443] [2021-06-05 21:25:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:59,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:59,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970203443] [2021-06-05 21:25:59,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970203443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:59,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401691264] [2021-06-05 21:25:59,921 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:59,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:25:59,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:25:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401691264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:59,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:59,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:25:59,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393707391] [2021-06-05 21:25:59,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:25:59,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:59,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:25:59,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:25:59,981 INFO L87 Difference]: Start difference. First operand 9951 states and 32478 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:00,138 INFO L93 Difference]: Finished difference Result 10112 states and 32702 transitions. [2021-06-05 21:26:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:00,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:00,157 INFO L225 Difference]: With dead ends: 10112 [2021-06-05 21:26:00,157 INFO L226 Difference]: Without dead ends: 10109 [2021-06-05 21:26:00,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2021-06-05 21:26:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 9943. [2021-06-05 21:26:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.2572922953128143) internal successors, (32384), 9942 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32384 transitions. [2021-06-05 21:26:00,289 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32384 transitions. Word has length 21 [2021-06-05 21:26:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:00,289 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32384 transitions. [2021-06-05 21:26:00,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32384 transitions. [2021-06-05 21:26:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:00,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:00,294 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:00,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:00,495 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1114207641, now seen corresponding path program 160 times [2021-06-05 21:26:00,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:00,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324605207] [2021-06-05 21:26:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:00,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:00,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324605207] [2021-06-05 21:26:00,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324605207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:00,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584501699] [2021-06-05 21:26:00,566 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:00,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:00,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584501699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:00,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:00,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:00,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348314585] [2021-06-05 21:26:00,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:00,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:00,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:00,629 INFO L87 Difference]: Start difference. First operand 9943 states and 32384 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:00,795 INFO L93 Difference]: Finished difference Result 10108 states and 32615 transitions. [2021-06-05 21:26:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:00,808 INFO L225 Difference]: With dead ends: 10108 [2021-06-05 21:26:00,808 INFO L226 Difference]: Without dead ends: 10105 [2021-06-05 21:26:00,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-06-05 21:26:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 9943. [2021-06-05 21:26:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256588211627439) internal successors, (32377), 9942 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32377 transitions. [2021-06-05 21:26:00,961 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32377 transitions. Word has length 21 [2021-06-05 21:26:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:00,961 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32377 transitions. [2021-06-05 21:26:00,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32377 transitions. [2021-06-05 21:26:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:00,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:00,966 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:01,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3115,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:01,167 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash 41122261, now seen corresponding path program 161 times [2021-06-05 21:26:01,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:01,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194950504] [2021-06-05 21:26:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:01,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:01,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194950504] [2021-06-05 21:26:01,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194950504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:01,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763886411] [2021-06-05 21:26:01,231 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:01,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:26:01,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:01,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763886411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:01,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:01,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:01,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936380535] [2021-06-05 21:26:01,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:01,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:01,292 INFO L87 Difference]: Start difference. First operand 9943 states and 32377 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:01,461 INFO L93 Difference]: Finished difference Result 10188 states and 32924 transitions. [2021-06-05 21:26:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:01,473 INFO L225 Difference]: With dead ends: 10188 [2021-06-05 21:26:01,474 INFO L226 Difference]: Without dead ends: 10184 [2021-06-05 21:26:01,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-06-05 21:26:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9943. [2021-06-05 21:26:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256487628243814) internal successors, (32376), 9942 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32376 transitions. [2021-06-05 21:26:01,600 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32376 transitions. Word has length 21 [2021-06-05 21:26:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:01,600 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32376 transitions. [2021-06-05 21:26:01,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32376 transitions. [2021-06-05 21:26:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:01,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:01,605 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:01,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3116,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:01,805 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:01,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1135213849, now seen corresponding path program 162 times [2021-06-05 21:26:01,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:01,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653401820] [2021-06-05 21:26:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:01,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:01,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653401820] [2021-06-05 21:26:01,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653401820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:01,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202915975] [2021-06-05 21:26:01,875 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:01,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:01,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:01,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:01,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202915975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:01,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:01,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:01,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640078609] [2021-06-05 21:26:01,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:01,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:01,933 INFO L87 Difference]: Start difference. First operand 9943 states and 32376 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:02,098 INFO L93 Difference]: Finished difference Result 10178 states and 32911 transitions. [2021-06-05 21:26:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:02,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:02,110 INFO L225 Difference]: With dead ends: 10178 [2021-06-05 21:26:02,110 INFO L226 Difference]: Without dead ends: 10173 [2021-06-05 21:26:02,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2021-06-05 21:26:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 9943. [2021-06-05 21:26:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256387044860189) internal successors, (32375), 9942 states have internal predecessors, (32375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32375 transitions. [2021-06-05 21:26:02,244 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32375 transitions. Word has length 21 [2021-06-05 21:26:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:02,244 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32375 transitions. [2021-06-05 21:26:02,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32375 transitions. [2021-06-05 21:26:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:02,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:02,250 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:02,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3117 [2021-06-05 21:26:02,450 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash 692314709, now seen corresponding path program 163 times [2021-06-05 21:26:02,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:02,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280721273] [2021-06-05 21:26:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:02,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:02,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280721273] [2021-06-05 21:26:02,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280721273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:02,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136873590] [2021-06-05 21:26:02,520 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:02,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:02,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136873590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:02,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:02,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:02,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617092624] [2021-06-05 21:26:02,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:02,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:02,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:02,575 INFO L87 Difference]: Start difference. First operand 9943 states and 32375 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:02,740 INFO L93 Difference]: Finished difference Result 10151 states and 32872 transitions. [2021-06-05 21:26:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:02,752 INFO L225 Difference]: With dead ends: 10151 [2021-06-05 21:26:02,752 INFO L226 Difference]: Without dead ends: 10145 [2021-06-05 21:26:02,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:02,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-06-05 21:26:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 9945. [2021-06-05 21:26:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9944 states have (on average 3.255832662912309) internal successors, (32376), 9944 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 32376 transitions. [2021-06-05 21:26:02,873 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 32376 transitions. Word has length 21 [2021-06-05 21:26:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:02,873 INFO L482 AbstractCegarLoop]: Abstraction has 9945 states and 32376 transitions. [2021-06-05 21:26:02,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 32376 transitions. [2021-06-05 21:26:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:02,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:02,878 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3118,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:03,078 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1359739827, now seen corresponding path program 164 times [2021-06-05 21:26:03,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:03,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550068748] [2021-06-05 21:26:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:03,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:03,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550068748] [2021-06-05 21:26:03,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550068748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:03,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848429757] [2021-06-05 21:26:03,135 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:03,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:03,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:03,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:26:03,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848429757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:03,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:03,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:26:03,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854817647] [2021-06-05 21:26:03,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:26:03,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:26:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:26:03,196 INFO L87 Difference]: Start difference. First operand 9945 states and 32376 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:03,302 INFO L93 Difference]: Finished difference Result 10106 states and 32713 transitions. [2021-06-05 21:26:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:26:03,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:03,314 INFO L225 Difference]: With dead ends: 10106 [2021-06-05 21:26:03,314 INFO L226 Difference]: Without dead ends: 10106 [2021-06-05 21:26:03,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:26:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-06-05 21:26:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9975. [2021-06-05 21:26:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2557649889713254) internal successors, (32473), 9974 states have internal predecessors, (32473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32473 transitions. [2021-06-05 21:26:03,438 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32473 transitions. Word has length 21 [2021-06-05 21:26:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:03,438 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32473 transitions. [2021-06-05 21:26:03,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32473 transitions. [2021-06-05 21:26:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:03,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:03,445 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:03,648 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash 328108493, now seen corresponding path program 165 times [2021-06-05 21:26:03,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:03,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063794251] [2021-06-05 21:26:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:03,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:03,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063794251] [2021-06-05 21:26:03,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063794251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:03,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552647448] [2021-06-05 21:26:03,700 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:03,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:03,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:03,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:03,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552647448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:03,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:03,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:26:03,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921895793] [2021-06-05 21:26:03,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:26:03,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:26:03,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:26:03,757 INFO L87 Difference]: Start difference. First operand 9975 states and 32473 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:03,899 INFO L93 Difference]: Finished difference Result 10155 states and 32890 transitions. [2021-06-05 21:26:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:26:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 21:26:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:03,912 INFO L225 Difference]: With dead ends: 10155 [2021-06-05 21:26:03,912 INFO L226 Difference]: Without dead ends: 10151 [2021-06-05 21:26:03,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:26:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-06-05 21:26:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9975. [2021-06-05 21:26:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.255564467615801) internal successors, (32471), 9974 states have internal predecessors, (32471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32471 transitions. [2021-06-05 21:26:04,069 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32471 transitions. Word has length 21 [2021-06-05 21:26:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:04,069 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32471 transitions. [2021-06-05 21:26:04,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32471 transitions. [2021-06-05 21:26:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:04,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:04,076 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:04,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-06-05 21:26:04,298 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:04,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1811243431, now seen corresponding path program 166 times [2021-06-05 21:26:04,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:04,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622752251] [2021-06-05 21:26:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:04,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:04,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622752251] [2021-06-05 21:26:04,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622752251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:04,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796264181] [2021-06-05 21:26:04,356 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:04,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:04,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:04,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796264181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:04,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:04,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:26:04,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375587285] [2021-06-05 21:26:04,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:04,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:04,413 INFO L87 Difference]: Start difference. First operand 9975 states and 32471 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:04,589 INFO L93 Difference]: Finished difference Result 10215 states and 32971 transitions. [2021-06-05 21:26:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:04,601 INFO L225 Difference]: With dead ends: 10215 [2021-06-05 21:26:04,601 INFO L226 Difference]: Without dead ends: 10211 [2021-06-05 21:26:04,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-06-05 21:26:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9975. [2021-06-05 21:26:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2551634249047523) internal successors, (32467), 9974 states have internal predecessors, (32467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32467 transitions. [2021-06-05 21:26:04,725 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32467 transitions. Word has length 21 [2021-06-05 21:26:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:04,725 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32467 transitions. [2021-06-05 21:26:04,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32467 transitions. [2021-06-05 21:26:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:04,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:04,730 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:04,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3121 [2021-06-05 21:26:04,931 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:04,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1389632277, now seen corresponding path program 167 times [2021-06-05 21:26:04,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:04,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188319623] [2021-06-05 21:26:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:05,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:05,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188319623] [2021-06-05 21:26:05,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188319623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:05,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959357842] [2021-06-05 21:26:05,004 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:05,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:05,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:05,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:05,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959357842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:05,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:05,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503837348] [2021-06-05 21:26:05,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:05,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:05,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:05,080 INFO L87 Difference]: Start difference. First operand 9975 states and 32467 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:05,283 INFO L93 Difference]: Finished difference Result 10242 states and 33109 transitions. [2021-06-05 21:26:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:05,298 INFO L225 Difference]: With dead ends: 10242 [2021-06-05 21:26:05,298 INFO L226 Difference]: Without dead ends: 10237 [2021-06-05 21:26:05,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-06-05 21:26:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 9984. [2021-06-05 21:26:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.254332365020535) internal successors, (32488), 9983 states have internal predecessors, (32488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32488 transitions. [2021-06-05 21:26:05,431 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32488 transitions. Word has length 21 [2021-06-05 21:26:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:05,431 INFO L482 AbstractCegarLoop]: Abstraction has 9984 states and 32488 transitions. [2021-06-05 21:26:05,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32488 transitions. [2021-06-05 21:26:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:05,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:05,436 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:05,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-06-05 21:26:05,637 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash 543786253, now seen corresponding path program 168 times [2021-06-05 21:26:05,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:05,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259027718] [2021-06-05 21:26:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:05,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259027718] [2021-06-05 21:26:05,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259027718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077696731] [2021-06-05 21:26:05,707 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:05,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:05,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:05,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077696731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:05,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:05,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:05,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124145171] [2021-06-05 21:26:05,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:05,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:05,765 INFO L87 Difference]: Start difference. First operand 9984 states and 32488 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:05,928 INFO L93 Difference]: Finished difference Result 10254 states and 33040 transitions. [2021-06-05 21:26:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:05,942 INFO L225 Difference]: With dead ends: 10254 [2021-06-05 21:26:05,942 INFO L226 Difference]: Without dead ends: 10250 [2021-06-05 21:26:05,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-06-05 21:26:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9984. [2021-06-05 21:26:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.253731343283582) internal successors, (32482), 9983 states have internal predecessors, (32482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32482 transitions. [2021-06-05 21:26:06,073 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32482 transitions. Word has length 21 [2021-06-05 21:26:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:06,073 INFO L482 AbstractCegarLoop]: Abstraction has 9984 states and 32482 transitions. [2021-06-05 21:26:06,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32482 transitions. [2021-06-05 21:26:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:06,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:06,079 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:06,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:06,279 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:06,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1637877841, now seen corresponding path program 169 times [2021-06-05 21:26:06,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:06,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315758085] [2021-06-05 21:26:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:06,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315758085] [2021-06-05 21:26:06,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315758085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977773709] [2021-06-05 21:26:06,343 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:06,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977773709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:06,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:06,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110979737] [2021-06-05 21:26:06,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:06,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:06,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:06,397 INFO L87 Difference]: Start difference. First operand 9984 states and 32482 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:06,564 INFO L93 Difference]: Finished difference Result 10346 states and 33347 transitions. [2021-06-05 21:26:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:06,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:06,577 INFO L225 Difference]: With dead ends: 10346 [2021-06-05 21:26:06,577 INFO L226 Difference]: Without dead ends: 10341 [2021-06-05 21:26:06,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2021-06-05 21:26:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9986. [2021-06-05 21:26:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 3.25378067100651) internal successors, (32489), 9985 states have internal predecessors, (32489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 32489 transitions. [2021-06-05 21:26:06,706 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 32489 transitions. Word has length 21 [2021-06-05 21:26:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:06,706 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 32489 transitions. [2021-06-05 21:26:06,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 32489 transitions. [2021-06-05 21:26:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:06,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:06,712 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:06,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:06,912 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1194978701, now seen corresponding path program 170 times [2021-06-05 21:26:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:06,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944924014] [2021-06-05 21:26:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:06,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944924014] [2021-06-05 21:26:06,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944924014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:06,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644060194] [2021-06-05 21:26:06,984 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:07,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:07,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:07,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644060194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:07,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:07,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:07,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648122308] [2021-06-05 21:26:07,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:07,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:07,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:07,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:07,045 INFO L87 Difference]: Start difference. First operand 9986 states and 32489 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:07,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:07,231 INFO L93 Difference]: Finished difference Result 10320 states and 33310 transitions. [2021-06-05 21:26:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:07,288 INFO L225 Difference]: With dead ends: 10320 [2021-06-05 21:26:07,288 INFO L226 Difference]: Without dead ends: 10314 [2021-06-05 21:26:07,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2021-06-05 21:26:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 9996. [2021-06-05 21:26:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9996 states, 9995 states have (on average 3.253126563281641) internal successors, (32515), 9995 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9996 states to 9996 states and 32515 transitions. [2021-06-05 21:26:07,424 INFO L78 Accepts]: Start accepts. Automaton has 9996 states and 32515 transitions. Word has length 21 [2021-06-05 21:26:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:07,424 INFO L482 AbstractCegarLoop]: Abstraction has 9996 states and 32515 transitions. [2021-06-05 21:26:07,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 9996 states and 32515 transitions. [2021-06-05 21:26:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:07,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:07,430 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:07,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3125,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:07,630 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash 335261461, now seen corresponding path program 171 times [2021-06-05 21:26:07,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:07,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765980489] [2021-06-05 21:26:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:07,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:07,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765980489] [2021-06-05 21:26:07,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765980489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:07,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799287047] [2021-06-05 21:26:07,680 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:07,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:07,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:07,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:07,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:07,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799287047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:07,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:07,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:26:07,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467425805] [2021-06-05 21:26:07,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:26:07,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:07,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:26:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:26:07,744 INFO L87 Difference]: Start difference. First operand 9996 states and 32515 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:07,830 INFO L93 Difference]: Finished difference Result 10199 states and 32826 transitions. [2021-06-05 21:26:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:26:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:07,845 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 21:26:07,845 INFO L226 Difference]: Without dead ends: 10199 [2021-06-05 21:26:07,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2021-06-05 21:26:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 10005. [2021-06-05 21:26:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2531987205117954) internal successors, (32545), 10004 states have internal predecessors, (32545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32545 transitions. [2021-06-05 21:26:07,982 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32545 transitions. Word has length 21 [2021-06-05 21:26:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:07,982 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32545 transitions. [2021-06-05 21:26:07,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32545 transitions. [2021-06-05 21:26:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:07,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:07,987 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:08,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:08,188 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2075353771, now seen corresponding path program 172 times [2021-06-05 21:26:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:08,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550332506] [2021-06-05 21:26:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:08,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550332506] [2021-06-05 21:26:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550332506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137295733] [2021-06-05 21:26:08,255 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:08,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:08,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:08,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137295733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:08,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:08,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:26:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016788001] [2021-06-05 21:26:08,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:08,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:08,327 INFO L87 Difference]: Start difference. First operand 10005 states and 32545 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:08,434 INFO L93 Difference]: Finished difference Result 10191 states and 32796 transitions. [2021-06-05 21:26:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:26:08,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-06-05 21:26:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:08,452 INFO L225 Difference]: With dead ends: 10191 [2021-06-05 21:26:08,452 INFO L226 Difference]: Without dead ends: 10191 [2021-06-05 21:26:08,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:26:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2021-06-05 21:26:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 10005. [2021-06-05 21:26:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.251799280287885) internal successors, (32531), 10004 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32531 transitions. [2021-06-05 21:26:08,624 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32531 transitions. Word has length 21 [2021-06-05 21:26:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:08,624 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32531 transitions. [2021-06-05 21:26:08,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32531 transitions. [2021-06-05 21:26:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:08,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:08,631 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:08,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:08,845 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -509000217, now seen corresponding path program 173 times [2021-06-05 21:26:08,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:08,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066100833] [2021-06-05 21:26:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:08,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:08,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066100833] [2021-06-05 21:26:08,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066100833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:08,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23035923] [2021-06-05 21:26:08,908 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:08,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:26:08,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:08,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:08,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:08,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23035923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:08,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:08,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:26:08,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591695291] [2021-06-05 21:26:08,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:08,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:08,969 INFO L87 Difference]: Start difference. First operand 10005 states and 32531 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:09,132 INFO L93 Difference]: Finished difference Result 10188 states and 32786 transitions. [2021-06-05 21:26:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-06-05 21:26:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:09,144 INFO L225 Difference]: With dead ends: 10188 [2021-06-05 21:26:09,145 INFO L226 Difference]: Without dead ends: 10186 [2021-06-05 21:26:09,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-05 21:26:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10005. [2021-06-05 21:26:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.249000399840064) internal successors, (32503), 10004 states have internal predecessors, (32503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32503 transitions. [2021-06-05 21:26:09,276 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32503 transitions. Word has length 21 [2021-06-05 21:26:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:09,276 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32503 transitions. [2021-06-05 21:26:09,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32503 transitions. [2021-06-05 21:26:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:09,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:09,282 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:09,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3128,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:09,482 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:09,482 INFO L82 PathProgramCache]: Analyzing trace with hash 980404779, now seen corresponding path program 174 times [2021-06-05 21:26:09,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:09,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494449764] [2021-06-05 21:26:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:09,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494449764] [2021-06-05 21:26:09,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494449764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461771896] [2021-06-05 21:26:09,540 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:09,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:26:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:09,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461771896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:09,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:09,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732083333] [2021-06-05 21:26:09,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:09,604 INFO L87 Difference]: Start difference. First operand 10005 states and 32503 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:09,787 INFO L93 Difference]: Finished difference Result 10193 states and 32765 transitions. [2021-06-05 21:26:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:09,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:09,800 INFO L225 Difference]: With dead ends: 10193 [2021-06-05 21:26:09,800 INFO L226 Difference]: Without dead ends: 10190 [2021-06-05 21:26:09,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-06-05 21:26:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 10005. [2021-06-05 21:26:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2486005597760896) internal successors, (32499), 10004 states have internal predecessors, (32499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32499 transitions. [2021-06-05 21:26:09,930 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32499 transitions. Word has length 21 [2021-06-05 21:26:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:09,930 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32499 transitions. [2021-06-05 21:26:09,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32499 transitions. [2021-06-05 21:26:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:09,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:09,935 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:10,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3129 [2021-06-05 21:26:10,136 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash -92680601, now seen corresponding path program 175 times [2021-06-05 21:26:10,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:10,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161770903] [2021-06-05 21:26:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:10,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:10,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161770903] [2021-06-05 21:26:10,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161770903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:10,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170662127] [2021-06-05 21:26:10,224 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:10,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:10,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170662127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:10,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:10,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:10,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454259669] [2021-06-05 21:26:10,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:10,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:10,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:10,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:10,287 INFO L87 Difference]: Start difference. First operand 10005 states and 32499 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:10,483 INFO L93 Difference]: Finished difference Result 10199 states and 32771 transitions. [2021-06-05 21:26:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:10,535 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 21:26:10,535 INFO L226 Difference]: Without dead ends: 10195 [2021-06-05 21:26:10,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10195 states. [2021-06-05 21:26:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10195 to 10005. [2021-06-05 21:26:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.248200719712115) internal successors, (32495), 10004 states have internal predecessors, (32495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32495 transitions. [2021-06-05 21:26:10,654 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32495 transitions. Word has length 21 [2021-06-05 21:26:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:10,654 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32495 transitions. [2021-06-05 21:26:10,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:10,654 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32495 transitions. [2021-06-05 21:26:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:10,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:10,659 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:10,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3130 [2021-06-05 21:26:10,860 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:10,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1001410987, now seen corresponding path program 176 times [2021-06-05 21:26:10,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:10,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423796615] [2021-06-05 21:26:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:10,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:10,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423796615] [2021-06-05 21:26:10,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423796615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:10,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333906770] [2021-06-05 21:26:10,930 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:10,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:10,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:11,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333906770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:11,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:11,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:11,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959977954] [2021-06-05 21:26:11,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:11,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:11,011 INFO L87 Difference]: Start difference. First operand 10005 states and 32495 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:11,207 INFO L93 Difference]: Finished difference Result 10440 states and 33536 transitions. [2021-06-05 21:26:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:11,220 INFO L225 Difference]: With dead ends: 10440 [2021-06-05 21:26:11,220 INFO L226 Difference]: Without dead ends: 10435 [2021-06-05 21:26:11,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-06-05 21:26:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10008. [2021-06-05 21:26:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 3.2482262416308583) internal successors, (32505), 10007 states have internal predecessors, (32505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 32505 transitions. [2021-06-05 21:26:11,375 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 32505 transitions. Word has length 21 [2021-06-05 21:26:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:11,375 INFO L482 AbstractCegarLoop]: Abstraction has 10008 states and 32505 transitions. [2021-06-05 21:26:11,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 32505 transitions. [2021-06-05 21:26:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:11,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:11,380 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:11,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3131 [2021-06-05 21:26:11,581 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash 558511847, now seen corresponding path program 177 times [2021-06-05 21:26:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:11,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051068501] [2021-06-05 21:26:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:11,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051068501] [2021-06-05 21:26:11,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051068501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545057066] [2021-06-05 21:26:11,652 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:11,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:11,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:11,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:11,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545057066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:11,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:11,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:11,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869319164] [2021-06-05 21:26:11,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:11,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:11,716 INFO L87 Difference]: Start difference. First operand 10008 states and 32505 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:11,910 INFO L93 Difference]: Finished difference Result 10434 states and 33526 transitions. [2021-06-05 21:26:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:11,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:11,924 INFO L225 Difference]: With dead ends: 10434 [2021-06-05 21:26:11,924 INFO L226 Difference]: Without dead ends: 10428 [2021-06-05 21:26:11,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-06-05 21:26:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 10011. [2021-06-05 21:26:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10011 states, 10010 states have (on average 3.2482517482517483) internal successors, (32515), 10010 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 32515 transitions. [2021-06-05 21:26:12,054 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 32515 transitions. Word has length 21 [2021-06-05 21:26:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:12,054 INFO L482 AbstractCegarLoop]: Abstraction has 10011 states and 32515 transitions. [2021-06-05 21:26:12,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 32515 transitions. [2021-06-05 21:26:12,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:12,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:12,059 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:12,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-06-05 21:26:12,260 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash -286459605, now seen corresponding path program 178 times [2021-06-05 21:26:12,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:12,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872187817] [2021-06-05 21:26:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:12,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:12,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872187817] [2021-06-05 21:26:12,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872187817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:12,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105834724] [2021-06-05 21:26:12,335 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:12,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:12,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:12,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:12,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105834724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:12,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:12,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:12,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711804679] [2021-06-05 21:26:12,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:12,397 INFO L87 Difference]: Start difference. First operand 10011 states and 32515 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:12,589 INFO L93 Difference]: Finished difference Result 10403 states and 33484 transitions. [2021-06-05 21:26:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:12,603 INFO L225 Difference]: With dead ends: 10403 [2021-06-05 21:26:12,603 INFO L226 Difference]: Without dead ends: 10396 [2021-06-05 21:26:12,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-06-05 21:26:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 10027. [2021-06-05 21:26:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 10026 states have (on average 3.246658687412727) internal successors, (32551), 10026 states have internal predecessors, (32551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 32551 transitions. [2021-06-05 21:26:12,730 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 32551 transitions. Word has length 21 [2021-06-05 21:26:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:12,730 INFO L482 AbstractCegarLoop]: Abstraction has 10027 states and 32551 transitions. [2021-06-05 21:26:12,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 32551 transitions. [2021-06-05 21:26:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:12,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:12,735 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:12,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3133 [2021-06-05 21:26:12,935 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:12,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1337942037, now seen corresponding path program 179 times [2021-06-05 21:26:12,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:12,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352378811] [2021-06-05 21:26:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:12,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352378811] [2021-06-05 21:26:12,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352378811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588667470] [2021-06-05 21:26:12,986 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:13,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:26:13,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588667470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:13,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:13,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 21:26:13,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906269274] [2021-06-05 21:26:13,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:13,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:13,074 INFO L87 Difference]: Start difference. First operand 10027 states and 32551 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:13,202 INFO L93 Difference]: Finished difference Result 10268 states and 33007 transitions. [2021-06-05 21:26:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:26:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:13,214 INFO L225 Difference]: With dead ends: 10268 [2021-06-05 21:26:13,214 INFO L226 Difference]: Without dead ends: 10268 [2021-06-05 21:26:13,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:26:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2021-06-05 21:26:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10029. [2021-06-05 21:26:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.2461108895093735) internal successors, (32552), 10028 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32552 transitions. [2021-06-05 21:26:13,337 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32552 transitions. Word has length 21 [2021-06-05 21:26:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:13,337 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32552 transitions. [2021-06-05 21:26:13,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32552 transitions. [2021-06-05 21:26:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:13,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:13,342 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:13,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:13,543 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1308049587, now seen corresponding path program 180 times [2021-06-05 21:26:13,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:13,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443765255] [2021-06-05 21:26:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:13,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443765255] [2021-06-05 21:26:13,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443765255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883802732] [2021-06-05 21:26:13,601 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:13,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:26:13,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:13,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:13,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:13,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883802732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:13,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:13,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:26:13,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339382481] [2021-06-05 21:26:13,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:13,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:13,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:13,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:13,716 INFO L87 Difference]: Start difference. First operand 10029 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:13,849 INFO L93 Difference]: Finished difference Result 10257 states and 33080 transitions. [2021-06-05 21:26:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:13,864 INFO L225 Difference]: With dead ends: 10257 [2021-06-05 21:26:13,864 INFO L226 Difference]: Without dead ends: 10252 [2021-06-05 21:26:13,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-06-05 21:26:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 10029. [2021-06-05 21:26:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245911447945752) internal successors, (32550), 10028 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32550 transitions. [2021-06-05 21:26:13,991 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32550 transitions. Word has length 21 [2021-06-05 21:26:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:13,991 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32550 transitions. [2021-06-05 21:26:13,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32550 transitions. [2021-06-05 21:26:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:13,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:13,996 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:14,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3135,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:14,196 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:14,197 INFO L82 PathProgramCache]: Analyzing trace with hash 40592409, now seen corresponding path program 181 times [2021-06-05 21:26:14,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:14,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314729988] [2021-06-05 21:26:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:14,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314729988] [2021-06-05 21:26:14,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314729988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290724062] [2021-06-05 21:26:14,260 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:14,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290724062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:14,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:14,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569729258] [2021-06-05 21:26:14,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:14,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:14,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:14,328 INFO L87 Difference]: Start difference. First operand 10029 states and 32550 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:14,490 INFO L93 Difference]: Finished difference Result 10339 states and 33223 transitions. [2021-06-05 21:26:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:14,503 INFO L225 Difference]: With dead ends: 10339 [2021-06-05 21:26:14,503 INFO L226 Difference]: Without dead ends: 10334 [2021-06-05 21:26:14,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-06-05 21:26:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10029. [2021-06-05 21:26:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245512564818508) internal successors, (32546), 10028 states have internal predecessors, (32546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32546 transitions. [2021-06-05 21:26:14,636 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32546 transitions. Word has length 21 [2021-06-05 21:26:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:14,636 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32546 transitions. [2021-06-05 21:26:14,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32546 transitions. [2021-06-05 21:26:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:14,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:14,641 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:14,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3136 [2021-06-05 21:26:14,842 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash -402306731, now seen corresponding path program 182 times [2021-06-05 21:26:14,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:14,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287557172] [2021-06-05 21:26:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:14,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:14,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287557172] [2021-06-05 21:26:14,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287557172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685743728] [2021-06-05 21:26:14,910 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:14,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:14,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685743728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:14,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:14,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74330381] [2021-06-05 21:26:14,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:14,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:14,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:14,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:14,965 INFO L87 Difference]: Start difference. First operand 10029 states and 32546 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:15,155 INFO L93 Difference]: Finished difference Result 10400 states and 33463 transitions. [2021-06-05 21:26:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:15,170 INFO L225 Difference]: With dead ends: 10400 [2021-06-05 21:26:15,170 INFO L226 Difference]: Without dead ends: 10394 [2021-06-05 21:26:15,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-06-05 21:26:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 10047. [2021-06-05 21:26:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244873581524985) internal successors, (32598), 10046 states have internal predecessors, (32598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32598 transitions. [2021-06-05 21:26:15,312 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32598 transitions. Word has length 21 [2021-06-05 21:26:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:15,313 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 32598 transitions. [2021-06-05 21:26:15,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32598 transitions. [2021-06-05 21:26:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:15,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:15,318 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:15,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3137,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:15,519 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash -595874445, now seen corresponding path program 183 times [2021-06-05 21:26:15,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:15,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412410914] [2021-06-05 21:26:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:15,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412410914] [2021-06-05 21:26:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412410914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874838158] [2021-06-05 21:26:15,590 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:15,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:26:15,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:15,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874838158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:15,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:15,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:15,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292320363] [2021-06-05 21:26:15,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:15,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:15,656 INFO L87 Difference]: Start difference. First operand 10047 states and 32598 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:15,852 INFO L93 Difference]: Finished difference Result 10336 states and 33135 transitions. [2021-06-05 21:26:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:15,864 INFO L225 Difference]: With dead ends: 10336 [2021-06-05 21:26:15,864 INFO L226 Difference]: Without dead ends: 10331 [2021-06-05 21:26:15,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-06-05 21:26:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10047. [2021-06-05 21:26:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244574955206052) internal successors, (32595), 10046 states have internal predecessors, (32595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32595 transitions. [2021-06-05 21:26:15,993 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32595 transitions. Word has length 21 [2021-06-05 21:26:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:15,993 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 32595 transitions. [2021-06-05 21:26:15,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32595 transitions. [2021-06-05 21:26:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:15,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:15,998 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:16,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3138 [2021-06-05 21:26:16,199 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1038773585, now seen corresponding path program 184 times [2021-06-05 21:26:16,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:16,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774343171] [2021-06-05 21:26:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:16,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:16,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774343171] [2021-06-05 21:26:16,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774343171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:16,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39360294] [2021-06-05 21:26:16,273 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:16,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:16,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39360294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:16,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:16,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:16,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563616228] [2021-06-05 21:26:16,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:16,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:16,336 INFO L87 Difference]: Start difference. First operand 10047 states and 32595 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:16,533 INFO L93 Difference]: Finished difference Result 10532 states and 33761 transitions. [2021-06-05 21:26:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:16,547 INFO L225 Difference]: With dead ends: 10532 [2021-06-05 21:26:16,547 INFO L226 Difference]: Without dead ends: 10526 [2021-06-05 21:26:16,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:26:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-06-05 21:26:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 10055. [2021-06-05 21:26:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10055 states, 10054 states have (on average 3.244778197732246) internal successors, (32623), 10054 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10055 states to 10055 states and 32623 transitions. [2021-06-05 21:26:16,729 INFO L78 Accepts]: Start accepts. Automaton has 10055 states and 32623 transitions. Word has length 21 [2021-06-05 21:26:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:16,729 INFO L482 AbstractCegarLoop]: Abstraction has 10055 states and 32623 transitions. [2021-06-05 21:26:16,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10055 states and 32623 transitions. [2021-06-05 21:26:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:16,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:16,734 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:16,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3139,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:16,934 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1883745037, now seen corresponding path program 185 times [2021-06-05 21:26:16,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:16,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130866879] [2021-06-05 21:26:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:17,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:17,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130866879] [2021-06-05 21:26:17,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130866879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220797513] [2021-06-05 21:26:17,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:17,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:17,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220797513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:17,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:17,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371673456] [2021-06-05 21:26:17,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:17,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:17,072 INFO L87 Difference]: Start difference. First operand 10055 states and 32623 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:17,276 INFO L93 Difference]: Finished difference Result 10492 states and 33704 transitions. [2021-06-05 21:26:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:17,289 INFO L225 Difference]: With dead ends: 10492 [2021-06-05 21:26:17,289 INFO L226 Difference]: Without dead ends: 10485 [2021-06-05 21:26:17,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:26:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-06-05 21:26:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10067. [2021-06-05 21:26:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10067 states, 10066 states have (on average 3.2445857341545796) internal successors, (32660), 10066 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 32660 transitions. [2021-06-05 21:26:17,426 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 32660 transitions. Word has length 21 [2021-06-05 21:26:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:17,426 INFO L482 AbstractCegarLoop]: Abstraction has 10067 states and 32660 transitions. [2021-06-05 21:26:17,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 32660 transitions. [2021-06-05 21:26:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:17,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:17,432 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:17,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3140,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:17,632 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash 482340035, now seen corresponding path program 186 times [2021-06-05 21:26:17,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:17,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688615057] [2021-06-05 21:26:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:17,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:17,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688615057] [2021-06-05 21:26:17,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688615057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392669546] [2021-06-05 21:26:17,681 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:17,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:17,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:17,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:17,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392669546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:17,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:26:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128816386] [2021-06-05 21:26:17,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:26:17,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:26:17,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:26:17,744 INFO L87 Difference]: Start difference. First operand 10067 states and 32660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:17,823 INFO L93 Difference]: Finished difference Result 10308 states and 33030 transitions. [2021-06-05 21:26:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:26:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:17,836 INFO L225 Difference]: With dead ends: 10308 [2021-06-05 21:26:17,837 INFO L226 Difference]: Without dead ends: 10308 [2021-06-05 21:26:17,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-06-05 21:26:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 10076. [2021-06-05 21:26:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2450620347394543) internal successors, (32694), 10075 states have internal predecessors, (32694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32694 transitions. [2021-06-05 21:26:17,970 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32694 transitions. Word has length 21 [2021-06-05 21:26:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:17,970 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32694 transitions. [2021-06-05 21:26:17,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32694 transitions. [2021-06-05 21:26:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:17,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:17,976 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:18,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3141 [2021-06-05 21:26:18,176 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2072534951, now seen corresponding path program 187 times [2021-06-05 21:26:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:18,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118383725] [2021-06-05 21:26:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:18,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118383725] [2021-06-05 21:26:18,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118383725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34018013] [2021-06-05 21:26:18,226 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:18,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34018013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:18,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:18,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:26:18,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700967494] [2021-06-05 21:26:18,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:18,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:18,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:18,291 INFO L87 Difference]: Start difference. First operand 10076 states and 32694 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:18,389 INFO L93 Difference]: Finished difference Result 10304 states and 33012 transitions. [2021-06-05 21:26:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:26:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-06-05 21:26:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:18,403 INFO L225 Difference]: With dead ends: 10304 [2021-06-05 21:26:18,403 INFO L226 Difference]: Without dead ends: 10304 [2021-06-05 21:26:18,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-06-05 21:26:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10076. [2021-06-05 21:26:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2442679900744418) internal successors, (32686), 10075 states have internal predecessors, (32686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32686 transitions. [2021-06-05 21:26:18,543 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32686 transitions. Word has length 21 [2021-06-05 21:26:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:18,543 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32686 transitions. [2021-06-05 21:26:18,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32686 transitions. [2021-06-05 21:26:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:18,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:18,549 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:18,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:18,750 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash -361921643, now seen corresponding path program 188 times [2021-06-05 21:26:18,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:18,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756649039] [2021-06-05 21:26:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:18,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:18,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756649039] [2021-06-05 21:26:18,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756649039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:18,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816571262] [2021-06-05 21:26:18,806 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:18,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:18,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:18,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:18,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816571262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:18,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:18,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:26:18,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328176812] [2021-06-05 21:26:18,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:18,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:18,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:18,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:18,862 INFO L87 Difference]: Start difference. First operand 10076 states and 32686 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:19,014 INFO L93 Difference]: Finished difference Result 10301 states and 33002 transitions. [2021-06-05 21:26:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-06-05 21:26:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:19,026 INFO L225 Difference]: With dead ends: 10301 [2021-06-05 21:26:19,026 INFO L226 Difference]: Without dead ends: 10299 [2021-06-05 21:26:19,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-06-05 21:26:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 10076. [2021-06-05 21:26:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2425806451612904) internal successors, (32669), 10075 states have internal predecessors, (32669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32669 transitions. [2021-06-05 21:26:19,154 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32669 transitions. Word has length 21 [2021-06-05 21:26:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:19,154 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32669 transitions. [2021-06-05 21:26:19,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32669 transitions. [2021-06-05 21:26:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:19,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:19,160 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:19,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-06-05 21:26:19,362 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1127483353, now seen corresponding path program 189 times [2021-06-05 21:26:19,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:19,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029610785] [2021-06-05 21:26:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:19,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:19,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029610785] [2021-06-05 21:26:19,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029610785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:19,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538938823] [2021-06-05 21:26:19,419 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:19,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:19,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:19,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:19,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538938823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:19,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:19,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:19,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764639611] [2021-06-05 21:26:19,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:19,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:19,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:19,483 INFO L87 Difference]: Start difference. First operand 10076 states and 32669 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:19,657 INFO L93 Difference]: Finished difference Result 10306 states and 32992 transitions. [2021-06-05 21:26:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:19,670 INFO L225 Difference]: With dead ends: 10306 [2021-06-05 21:26:19,670 INFO L226 Difference]: Without dead ends: 10303 [2021-06-05 21:26:19,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-06-05 21:26:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 10076. [2021-06-05 21:26:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2422828784119107) internal successors, (32666), 10075 states have internal predecessors, (32666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32666 transitions. [2021-06-05 21:26:19,833 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32666 transitions. Word has length 21 [2021-06-05 21:26:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:19,833 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32666 transitions. [2021-06-05 21:26:19,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32666 transitions. [2021-06-05 21:26:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:19,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:19,839 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:20,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3144 [2021-06-05 21:26:20,039 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:20,040 INFO L82 PathProgramCache]: Analyzing trace with hash 54397973, now seen corresponding path program 190 times [2021-06-05 21:26:20,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:20,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745624009] [2021-06-05 21:26:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:20,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:20,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745624009] [2021-06-05 21:26:20,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745624009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:20,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149288729] [2021-06-05 21:26:20,099 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:20,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:20,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:20,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149288729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:20,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:20,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:26:20,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044516649] [2021-06-05 21:26:20,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:20,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:20,164 INFO L87 Difference]: Start difference. First operand 10076 states and 32666 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:20,310 INFO L93 Difference]: Finished difference Result 11212 states and 35976 transitions. [2021-06-05 21:26:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:20,325 INFO L225 Difference]: With dead ends: 11212 [2021-06-05 21:26:20,326 INFO L226 Difference]: Without dead ends: 11208 [2021-06-05 21:26:20,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-06-05 21:26:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 10076. [2021-06-05 21:26:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.241985111662531) internal successors, (32663), 10075 states have internal predecessors, (32663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32663 transitions. [2021-06-05 21:26:20,471 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32663 transitions. Word has length 21 [2021-06-05 21:26:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:20,471 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32663 transitions. [2021-06-05 21:26:20,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32663 transitions. [2021-06-05 21:26:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:20,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:20,477 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:20,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3145,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:20,677 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:20,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1148489561, now seen corresponding path program 191 times [2021-06-05 21:26:20,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:20,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519283821] [2021-06-05 21:26:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:20,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:20,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519283821] [2021-06-05 21:26:20,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519283821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:20,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122872263] [2021-06-05 21:26:20,745 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:20,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:26:20,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:20,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:20,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:20,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122872263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:20,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:20,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:20,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215008512] [2021-06-05 21:26:20,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:20,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:20,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:20,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:20,812 INFO L87 Difference]: Start difference. First operand 10076 states and 32663 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:20,989 INFO L93 Difference]: Finished difference Result 11223 states and 35989 transitions. [2021-06-05 21:26:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:21,004 INFO L225 Difference]: With dead ends: 11223 [2021-06-05 21:26:21,004 INFO L226 Difference]: Without dead ends: 11218 [2021-06-05 21:26:21,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-06-05 21:26:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10154. [2021-06-05 21:26:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.2445582586427655) internal successors, (32942), 10153 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32942 transitions. [2021-06-05 21:26:21,140 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32942 transitions. Word has length 21 [2021-06-05 21:26:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:21,140 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32942 transitions. [2021-06-05 21:26:21,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32942 transitions. [2021-06-05 21:26:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:21,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:21,145 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:21,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:21,346 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 705590421, now seen corresponding path program 192 times [2021-06-05 21:26:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:21,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457854510] [2021-06-05 21:26:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:21,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457854510] [2021-06-05 21:26:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457854510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243329940] [2021-06-05 21:26:21,413 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:21,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:26:21,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:21,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:21,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243329940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:21,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:21,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144300779] [2021-06-05 21:26:21,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:21,475 INFO L87 Difference]: Start difference. First operand 10154 states and 32942 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:21,620 INFO L93 Difference]: Finished difference Result 10405 states and 33574 transitions. [2021-06-05 21:26:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:21,632 INFO L225 Difference]: With dead ends: 10405 [2021-06-05 21:26:21,633 INFO L226 Difference]: Without dead ends: 10400 [2021-06-05 21:26:21,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-06-05 21:26:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10154. [2021-06-05 21:26:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244459765586526) internal successors, (32941), 10153 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32941 transitions. [2021-06-05 21:26:21,756 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32941 transitions. Word has length 21 [2021-06-05 21:26:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:21,756 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32941 transitions. [2021-06-05 21:26:21,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32941 transitions. [2021-06-05 21:26:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:21,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:21,761 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:21,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3147,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:21,962 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash -139381031, now seen corresponding path program 193 times [2021-06-05 21:26:21,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:21,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635695696] [2021-06-05 21:26:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:22,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635695696] [2021-06-05 21:26:22,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635695696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584379640] [2021-06-05 21:26:22,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:22,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584379640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:22,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:22,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690698069] [2021-06-05 21:26:22,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:22,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:22,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:22,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:22,096 INFO L87 Difference]: Start difference. First operand 10154 states and 32941 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:22,243 INFO L93 Difference]: Finished difference Result 10382 states and 33519 transitions. [2021-06-05 21:26:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:26:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:22,256 INFO L225 Difference]: With dead ends: 10382 [2021-06-05 21:26:22,257 INFO L226 Difference]: Without dead ends: 10376 [2021-06-05 21:26:22,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2021-06-05 21:26:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10154. [2021-06-05 21:26:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244361272530287) internal successors, (32940), 10153 states have internal predecessors, (32940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32940 transitions. [2021-06-05 21:26:22,384 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32940 transitions. Word has length 21 [2021-06-05 21:26:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:22,385 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32940 transitions. [2021-06-05 21:26:22,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32940 transitions. [2021-06-05 21:26:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:22,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:22,390 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:22,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3148 [2021-06-05 21:26:22,591 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:22,591 INFO L82 PathProgramCache]: Analyzing trace with hash -563692267, now seen corresponding path program 194 times [2021-06-05 21:26:22,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:22,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410256859] [2021-06-05 21:26:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:22,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410256859] [2021-06-05 21:26:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410256859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009571535] [2021-06-05 21:26:22,669 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:22,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:22,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:22,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009571535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:22,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:22,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773497149] [2021-06-05 21:26:22,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:22,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:22,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:22,733 INFO L87 Difference]: Start difference. First operand 10154 states and 32940 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:22,877 INFO L93 Difference]: Finished difference Result 10354 states and 33463 transitions. [2021-06-05 21:26:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:26:22,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:22,890 INFO L225 Difference]: With dead ends: 10354 [2021-06-05 21:26:22,890 INFO L226 Difference]: Without dead ends: 10347 [2021-06-05 21:26:22,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2021-06-05 21:26:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10154. [2021-06-05 21:26:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244262779474047) internal successors, (32939), 10153 states have internal predecessors, (32939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32939 transitions. [2021-06-05 21:26:23,046 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32939 transitions. Word has length 21 [2021-06-05 21:26:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:23,046 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32939 transitions. [2021-06-05 21:26:23,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32939 transitions. [2021-06-05 21:26:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:23,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:23,052 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:23,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:23,252 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash -933266099, now seen corresponding path program 195 times [2021-06-05 21:26:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:23,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716323904] [2021-06-05 21:26:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:23,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716323904] [2021-06-05 21:26:23,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716323904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736220381] [2021-06-05 21:26:23,308 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:23,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:23,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:23,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736220381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:23,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:23,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:23,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604435597] [2021-06-05 21:26:23,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:23,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:23,373 INFO L87 Difference]: Start difference. First operand 10154 states and 32939 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:23,490 INFO L93 Difference]: Finished difference Result 10360 states and 33271 transitions. [2021-06-05 21:26:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:26:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:23,504 INFO L225 Difference]: With dead ends: 10360 [2021-06-05 21:26:23,504 INFO L226 Difference]: Without dead ends: 10360 [2021-06-05 21:26:23,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:26:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2021-06-05 21:26:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10157. [2021-06-05 21:26:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.2441906262307993) internal successors, (32948), 10156 states have internal predecessors, (32948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32948 transitions. [2021-06-05 21:26:23,635 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32948 transitions. Word has length 21 [2021-06-05 21:26:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:23,635 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32948 transitions. [2021-06-05 21:26:23,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32948 transitions. [2021-06-05 21:26:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:23,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:23,641 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:23,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-06-05 21:26:23,841 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1621452429, now seen corresponding path program 196 times [2021-06-05 21:26:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:23,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125295637] [2021-06-05 21:26:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:23,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:23,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125295637] [2021-06-05 21:26:23,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125295637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:23,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605175790] [2021-06-05 21:26:23,944 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:23,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:23,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:23,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:24,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605175790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:24,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:24,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:26:24,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591269479] [2021-06-05 21:26:24,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:24,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:24,011 INFO L87 Difference]: Start difference. First operand 10157 states and 32948 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:24,209 INFO L93 Difference]: Finished difference Result 10425 states and 33574 transitions. [2021-06-05 21:26:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:24,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:24,227 INFO L225 Difference]: With dead ends: 10425 [2021-06-05 21:26:24,227 INFO L226 Difference]: Without dead ends: 10419 [2021-06-05 21:26:24,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-06-05 21:26:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10157. [2021-06-05 21:26:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24399369830642) internal successors, (32946), 10156 states have internal predecessors, (32946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32946 transitions. [2021-06-05 21:26:24,394 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32946 transitions. Word has length 21 [2021-06-05 21:26:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:24,394 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32946 transitions. [2021-06-05 21:26:24,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32946 transitions. [2021-06-05 21:26:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:24,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:24,400 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:24,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 21:26:24,600 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash 984985575, now seen corresponding path program 197 times [2021-06-05 21:26:24,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:24,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244137157] [2021-06-05 21:26:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:24,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:24,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244137157] [2021-06-05 21:26:24,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244137157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:24,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295196612] [2021-06-05 21:26:24,670 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:24,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:26:24,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:24,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:24,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295196612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:24,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:24,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:24,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299159476] [2021-06-05 21:26:24,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:24,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:24,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:24,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:24,734 INFO L87 Difference]: Start difference. First operand 10157 states and 32946 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:24,903 INFO L93 Difference]: Finished difference Result 10525 states and 33745 transitions. [2021-06-05 21:26:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:24,916 INFO L225 Difference]: With dead ends: 10525 [2021-06-05 21:26:24,916 INFO L226 Difference]: Without dead ends: 10519 [2021-06-05 21:26:24,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-06-05 21:26:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10157. [2021-06-05 21:26:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24379677038204) internal successors, (32944), 10156 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32944 transitions. [2021-06-05 21:26:25,048 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32944 transitions. Word has length 21 [2021-06-05 21:26:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:25,049 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32944 transitions. [2021-06-05 21:26:25,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32944 transitions. [2021-06-05 21:26:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:25,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:25,054 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:25,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3152,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:25,254 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash 140014123, now seen corresponding path program 198 times [2021-06-05 21:26:25,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:25,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623482843] [2021-06-05 21:26:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:25,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:25,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623482843] [2021-06-05 21:26:25,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623482843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:25,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109452749] [2021-06-05 21:26:25,324 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:25,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:26:25,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:25,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109452749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:25,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:25,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:25,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885935229] [2021-06-05 21:26:25,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:25,388 INFO L87 Difference]: Start difference. First operand 10157 states and 32944 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:25,594 INFO L93 Difference]: Finished difference Result 10675 states and 34250 transitions. [2021-06-05 21:26:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:25,607 INFO L225 Difference]: With dead ends: 10675 [2021-06-05 21:26:25,608 INFO L226 Difference]: Without dead ends: 10668 [2021-06-05 21:26:25,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:26:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-06-05 21:26:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10194. [2021-06-05 21:26:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10194 states, 10193 states have (on average 3.2428136956735014) internal successors, (33054), 10193 states have internal predecessors, (33054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10194 states to 10194 states and 33054 transitions. [2021-06-05 21:26:25,741 INFO L78 Accepts]: Start accepts. Automaton has 10194 states and 33054 transitions. Word has length 21 [2021-06-05 21:26:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:25,741 INFO L482 AbstractCegarLoop]: Abstraction has 10194 states and 33054 transitions. [2021-06-05 21:26:25,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10194 states and 33054 transitions. [2021-06-05 21:26:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:25,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:25,746 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:25,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-06-05 21:26:25,946 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1565617715, now seen corresponding path program 199 times [2021-06-05 21:26:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:25,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795454392] [2021-06-05 21:26:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:26,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:26,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795454392] [2021-06-05 21:26:26,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795454392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:26,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224171596] [2021-06-05 21:26:26,013 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:26,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:26,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224171596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:26,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:26,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:26,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205524398] [2021-06-05 21:26:26,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:26,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:26,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:26,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:26,076 INFO L87 Difference]: Start difference. First operand 10194 states and 33054 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:26,264 INFO L93 Difference]: Finished difference Result 10950 states and 35064 transitions. [2021-06-05 21:26:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:26,279 INFO L225 Difference]: With dead ends: 10950 [2021-06-05 21:26:26,279 INFO L226 Difference]: Without dead ends: 10944 [2021-06-05 21:26:26,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2021-06-05 21:26:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10207. [2021-06-05 21:26:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242994317068391) internal successors, (33098), 10206 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33098 transitions. [2021-06-05 21:26:26,415 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33098 transitions. Word has length 21 [2021-06-05 21:26:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:26,415 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33098 transitions. [2021-06-05 21:26:26,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33098 transitions. [2021-06-05 21:26:26,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:26,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:26,421 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:26,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-06-05 21:26:26,621 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:26,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1884378129, now seen corresponding path program 200 times [2021-06-05 21:26:26,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:26,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647397367] [2021-06-05 21:26:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:26,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:26,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647397367] [2021-06-05 21:26:26,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647397367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:26,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819571694] [2021-06-05 21:26:26,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:26,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:26,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819571694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:26,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:26,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:26,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873450576] [2021-06-05 21:26:26,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:26,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:26,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:26,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:26,752 INFO L87 Difference]: Start difference. First operand 10207 states and 33098 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:26,905 INFO L93 Difference]: Finished difference Result 10448 states and 33689 transitions. [2021-06-05 21:26:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:26,918 INFO L225 Difference]: With dead ends: 10448 [2021-06-05 21:26:26,918 INFO L226 Difference]: Without dead ends: 10442 [2021-06-05 21:26:26,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-06-05 21:26:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10207. [2021-06-05 21:26:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242896335488928) internal successors, (33097), 10206 states have internal predecessors, (33097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33097 transitions. [2021-06-05 21:26:27,049 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33097 transitions. Word has length 21 [2021-06-05 21:26:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:27,049 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33097 transitions. [2021-06-05 21:26:27,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33097 transitions. [2021-06-05 21:26:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:27,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:27,055 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:27,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-06-05 21:26:27,255 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1460066893, now seen corresponding path program 201 times [2021-06-05 21:26:27,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:27,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800884270] [2021-06-05 21:26:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:27,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:27,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800884270] [2021-06-05 21:26:27,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800884270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:27,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3804791] [2021-06-05 21:26:27,329 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:27,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:27,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:27,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:27,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3804791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:27,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:27,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:27,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878625396] [2021-06-05 21:26:27,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:27,396 INFO L87 Difference]: Start difference. First operand 10207 states and 33097 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:27,565 INFO L93 Difference]: Finished difference Result 10417 states and 33634 transitions. [2021-06-05 21:26:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:26:27,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:27,581 INFO L225 Difference]: With dead ends: 10417 [2021-06-05 21:26:27,581 INFO L226 Difference]: Without dead ends: 10410 [2021-06-05 21:26:27,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-06-05 21:26:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10207. [2021-06-05 21:26:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242798353909465) internal successors, (33096), 10206 states have internal predecessors, (33096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33096 transitions. [2021-06-05 21:26:27,718 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33096 transitions. Word has length 21 [2021-06-05 21:26:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:27,719 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33096 transitions. [2021-06-05 21:26:27,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33096 transitions. [2021-06-05 21:26:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:27,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:27,725 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:27,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3156,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:27,925 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash 746808533, now seen corresponding path program 202 times [2021-06-05 21:26:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:27,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810173493] [2021-06-05 21:26:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:27,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810173493] [2021-06-05 21:26:27,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810173493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783831886] [2021-06-05 21:26:27,983 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:28,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:28,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:28,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783831886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:28,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:28,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:26:28,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596388704] [2021-06-05 21:26:28,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:26:28,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:26:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:26:28,044 INFO L87 Difference]: Start difference. First operand 10207 states and 33096 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:28,133 INFO L93 Difference]: Finished difference Result 10562 states and 33685 transitions. [2021-06-05 21:26:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:26:28,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:28,147 INFO L225 Difference]: With dead ends: 10562 [2021-06-05 21:26:28,147 INFO L226 Difference]: Without dead ends: 10562 [2021-06-05 21:26:28,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-06-05 21:26:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10217. [2021-06-05 21:26:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 3.2434416601409555) internal successors, (33135), 10216 states have internal predecessors, (33135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 33135 transitions. [2021-06-05 21:26:28,281 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 33135 transitions. Word has length 21 [2021-06-05 21:26:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:28,281 INFO L482 AbstractCegarLoop]: Abstraction has 10217 states and 33135 transitions. [2021-06-05 21:26:28,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 33135 transitions. [2021-06-05 21:26:28,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:28,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:28,287 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:28,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:28,487 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1808066453, now seen corresponding path program 203 times [2021-06-05 21:26:28,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:28,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199966012] [2021-06-05 21:26:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:28,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:28,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199966012] [2021-06-05 21:26:28,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199966012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:28,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980498219] [2021-06-05 21:26:28,540 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:28,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:26:28,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:28,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:28,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980498219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:28,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:28,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:26:28,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138986837] [2021-06-05 21:26:28,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:28,602 INFO L87 Difference]: Start difference. First operand 10217 states and 33135 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:28,694 INFO L93 Difference]: Finished difference Result 10501 states and 33539 transitions. [2021-06-05 21:26:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:26:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-06-05 21:26:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:28,708 INFO L225 Difference]: With dead ends: 10501 [2021-06-05 21:26:28,708 INFO L226 Difference]: Without dead ends: 10501 [2021-06-05 21:26:28,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-05 21:26:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10216. [2021-06-05 21:26:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.243171806167401) internal successors, (33129), 10215 states have internal predecessors, (33129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33129 transitions. [2021-06-05 21:26:28,846 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33129 transitions. Word has length 21 [2021-06-05 21:26:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:28,846 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33129 transitions. [2021-06-05 21:26:28,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:26:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33129 transitions. [2021-06-05 21:26:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:28,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:28,851 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:29,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:29,052 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash -97453145, now seen corresponding path program 204 times [2021-06-05 21:26:29,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:29,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780870189] [2021-06-05 21:26:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:29,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:29,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780870189] [2021-06-05 21:26:29,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780870189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702355474] [2021-06-05 21:26:29,108 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:29,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:29,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702355474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:29,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119027049] [2021-06-05 21:26:29,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:29,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:29,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:29,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:29,166 INFO L87 Difference]: Start difference. First operand 10216 states and 33129 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:29,359 INFO L93 Difference]: Finished difference Result 10497 states and 33526 transitions. [2021-06-05 21:26:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:29,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:29,372 INFO L225 Difference]: With dead ends: 10497 [2021-06-05 21:26:29,372 INFO L226 Difference]: Without dead ends: 10495 [2021-06-05 21:26:29,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-06-05 21:26:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10216. [2021-06-05 21:26:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.242094958394518) internal successors, (33118), 10215 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33118 transitions. [2021-06-05 21:26:29,510 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33118 transitions. Word has length 21 [2021-06-05 21:26:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:29,510 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33118 transitions. [2021-06-05 21:26:29,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33118 transitions. [2021-06-05 21:26:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:29,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:29,516 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:29,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3159,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:29,717 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1391951851, now seen corresponding path program 205 times [2021-06-05 21:26:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:29,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764644554] [2021-06-05 21:26:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:29,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:29,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764644554] [2021-06-05 21:26:29,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764644554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994341882] [2021-06-05 21:26:29,772 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:29,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:29,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994341882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:29,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:26:29,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355549414] [2021-06-05 21:26:29,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:29,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:29,834 INFO L87 Difference]: Start difference. First operand 10216 states and 33118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:30,013 INFO L93 Difference]: Finished difference Result 10502 states and 33522 transitions. [2021-06-05 21:26:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:30,026 INFO L225 Difference]: With dead ends: 10502 [2021-06-05 21:26:30,026 INFO L226 Difference]: Without dead ends: 10499 [2021-06-05 21:26:30,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-06-05 21:26:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10216. [2021-06-05 21:26:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2418991678903573) internal successors, (33116), 10215 states have internal predecessors, (33116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33116 transitions. [2021-06-05 21:26:30,162 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33116 transitions. Word has length 21 [2021-06-05 21:26:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:30,162 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33116 transitions. [2021-06-05 21:26:30,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33116 transitions. [2021-06-05 21:26:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:30,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:30,167 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:30,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3160 [2021-06-05 21:26:30,368 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:30,368 INFO L82 PathProgramCache]: Analyzing trace with hash 318866471, now seen corresponding path program 206 times [2021-06-05 21:26:30,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:30,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947545988] [2021-06-05 21:26:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:30,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:30,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947545988] [2021-06-05 21:26:30,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947545988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:30,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040167168] [2021-06-05 21:26:30,428 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:30,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:30,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040167168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:30,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:30,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:26:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797951992] [2021-06-05 21:26:30,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:30,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:30,489 INFO L87 Difference]: Start difference. First operand 10216 states and 33116 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:30,645 INFO L93 Difference]: Finished difference Result 11892 states and 38186 transitions. [2021-06-05 21:26:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-06-05 21:26:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:30,660 INFO L225 Difference]: With dead ends: 11892 [2021-06-05 21:26:30,660 INFO L226 Difference]: Without dead ends: 11888 [2021-06-05 21:26:30,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11888 states. [2021-06-05 21:26:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11888 to 10216. [2021-06-05 21:26:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2417033773861967) internal successors, (33114), 10215 states have internal predecessors, (33114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33114 transitions. [2021-06-05 21:26:30,802 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33114 transitions. Word has length 21 [2021-06-05 21:26:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:30,802 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33114 transitions. [2021-06-05 21:26:30,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:26:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33114 transitions. [2021-06-05 21:26:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:30,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:30,807 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:31,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3161,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:31,008 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1412958059, now seen corresponding path program 207 times [2021-06-05 21:26:31,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:31,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342913792] [2021-06-05 21:26:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:31,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:31,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342913792] [2021-06-05 21:26:31,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342913792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:31,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104828210] [2021-06-05 21:26:31,068 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:31,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:26:31,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:31,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104828210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:31,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:31,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:31,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756083773] [2021-06-05 21:26:31,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:31,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:31,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:31,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:31,132 INFO L87 Difference]: Start difference. First operand 10216 states and 33114 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:31,279 INFO L93 Difference]: Finished difference Result 11434 states and 36626 transitions. [2021-06-05 21:26:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:31,294 INFO L225 Difference]: With dead ends: 11434 [2021-06-05 21:26:31,294 INFO L226 Difference]: Without dead ends: 11429 [2021-06-05 21:26:31,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2021-06-05 21:26:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 10216. [2021-06-05 21:26:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.241507586882036) internal successors, (33112), 10215 states have internal predecessors, (33112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33112 transitions. [2021-06-05 21:26:31,429 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33112 transitions. Word has length 21 [2021-06-05 21:26:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:31,429 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33112 transitions. [2021-06-05 21:26:31,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33112 transitions. [2021-06-05 21:26:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:31,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:31,435 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:31,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3162 [2021-06-05 21:26:31,636 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:31,636 INFO L82 PathProgramCache]: Analyzing trace with hash 970058919, now seen corresponding path program 208 times [2021-06-05 21:26:31,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:31,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288539101] [2021-06-05 21:26:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:31,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:31,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288539101] [2021-06-05 21:26:31,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288539101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:31,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360384712] [2021-06-05 21:26:31,705 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:31,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:31,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360384712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:31,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:31,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:31,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358202219] [2021-06-05 21:26:31,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:31,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:31,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:31,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:31,766 INFO L87 Difference]: Start difference. First operand 10216 states and 33112 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:31,939 INFO L93 Difference]: Finished difference Result 11458 states and 36660 transitions. [2021-06-05 21:26:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:31,952 INFO L225 Difference]: With dead ends: 11458 [2021-06-05 21:26:31,953 INFO L226 Difference]: Without dead ends: 11452 [2021-06-05 21:26:31,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-06-05 21:26:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 10313. [2021-06-05 21:26:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2438906128782) internal successors, (33451), 10312 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33451 transitions. [2021-06-05 21:26:32,138 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33451 transitions. Word has length 21 [2021-06-05 21:26:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:32,138 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33451 transitions. [2021-06-05 21:26:32,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33451 transitions. [2021-06-05 21:26:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:32,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:32,144 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-06-05 21:26:32,344 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 125087467, now seen corresponding path program 209 times [2021-06-05 21:26:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286428645] [2021-06-05 21:26:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:32,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286428645] [2021-06-05 21:26:32,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286428645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125958575] [2021-06-05 21:26:32,414 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:32,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:26:32,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:32,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:32,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125958575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:32,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:32,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:32,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850609632] [2021-06-05 21:26:32,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:32,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:32,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:32,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:32,478 INFO L87 Difference]: Start difference. First operand 10313 states and 33451 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:32,638 INFO L93 Difference]: Finished difference Result 10600 states and 34163 transitions. [2021-06-05 21:26:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:32,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:32,650 INFO L225 Difference]: With dead ends: 10600 [2021-06-05 21:26:32,651 INFO L226 Difference]: Without dead ends: 10594 [2021-06-05 21:26:32,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2021-06-05 21:26:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10313. [2021-06-05 21:26:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2437936384794415) internal successors, (33450), 10312 states have internal predecessors, (33450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33450 transitions. [2021-06-05 21:26:32,775 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33450 transitions. Word has length 21 [2021-06-05 21:26:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:32,775 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33450 transitions. [2021-06-05 21:26:32,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33450 transitions. [2021-06-05 21:26:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:32,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:32,781 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:32,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3164,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:32,981 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash -299223769, now seen corresponding path program 210 times [2021-06-05 21:26:32,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:32,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793385923] [2021-06-05 21:26:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:33,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:33,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793385923] [2021-06-05 21:26:33,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793385923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:33,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861966224] [2021-06-05 21:26:33,059 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:33,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:33,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:33,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:33,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861966224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:33,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:33,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343321185] [2021-06-05 21:26:33,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:33,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:33,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:33,123 INFO L87 Difference]: Start difference. First operand 10313 states and 33450 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:33,263 INFO L93 Difference]: Finished difference Result 10577 states and 34108 transitions. [2021-06-05 21:26:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:26:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:33,275 INFO L225 Difference]: With dead ends: 10577 [2021-06-05 21:26:33,275 INFO L226 Difference]: Without dead ends: 10570 [2021-06-05 21:26:33,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2021-06-05 21:26:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 10313. [2021-06-05 21:26:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243696664080683) internal successors, (33449), 10312 states have internal predecessors, (33449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33449 transitions. [2021-06-05 21:26:33,402 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33449 transitions. Word has length 21 [2021-06-05 21:26:33,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:33,402 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33449 transitions. [2021-06-05 21:26:33,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33449 transitions. [2021-06-05 21:26:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:33,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:33,408 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:33,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3165 [2021-06-05 21:26:33,608 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:33,608 INFO L82 PathProgramCache]: Analyzing trace with hash -567970197, now seen corresponding path program 211 times [2021-06-05 21:26:33,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:33,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860223190] [2021-06-05 21:26:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:33,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:33,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860223190] [2021-06-05 21:26:33,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860223190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:33,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765956856] [2021-06-05 21:26:33,693 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:33,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765956856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:33,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:33,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930708674] [2021-06-05 21:26:33,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:33,755 INFO L87 Difference]: Start difference. First operand 10313 states and 33449 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:33,902 INFO L93 Difference]: Finished difference Result 10543 states and 34047 transitions. [2021-06-05 21:26:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:26:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-06-05 21:26:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:33,918 INFO L225 Difference]: With dead ends: 10543 [2021-06-05 21:26:33,918 INFO L226 Difference]: Without dead ends: 10535 [2021-06-05 21:26:33,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2021-06-05 21:26:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 10313. [2021-06-05 21:26:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243599689681924) internal successors, (33448), 10312 states have internal predecessors, (33448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33448 transitions. [2021-06-05 21:26:34,061 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33448 transitions. Word has length 21 [2021-06-05 21:26:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:34,061 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33448 transitions. [2021-06-05 21:26:34,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:26:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33448 transitions. [2021-06-05 21:26:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:34,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:34,067 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:34,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3166,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:34,267 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1673725717, now seen corresponding path program 212 times [2021-06-05 21:26:34,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:34,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962836274] [2021-06-05 21:26:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:34,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:34,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962836274] [2021-06-05 21:26:34,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962836274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:34,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106771362] [2021-06-05 21:26:34,339 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:34,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:34,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106771362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:34,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:34,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241217267] [2021-06-05 21:26:34,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:34,401 INFO L87 Difference]: Start difference. First operand 10313 states and 33448 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:34,533 INFO L93 Difference]: Finished difference Result 10708 states and 34397 transitions. [2021-06-05 21:26:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:26:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:34,548 INFO L225 Difference]: With dead ends: 10708 [2021-06-05 21:26:34,548 INFO L226 Difference]: Without dead ends: 10708 [2021-06-05 21:26:34,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:26:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-06-05 21:26:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 10467. [2021-06-05 21:26:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2501433212306514) internal successors, (34016), 10466 states have internal predecessors, (34016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34016 transitions. [2021-06-05 21:26:34,687 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34016 transitions. Word has length 21 [2021-06-05 21:26:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:34,687 INFO L482 AbstractCegarLoop]: Abstraction has 10467 states and 34016 transitions. [2021-06-05 21:26:34,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34016 transitions. [2021-06-05 21:26:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:34,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:34,692 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:34,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3167,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:34,893 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1547961357, now seen corresponding path program 213 times [2021-06-05 21:26:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:34,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413644049] [2021-06-05 21:26:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:34,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:34,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413644049] [2021-06-05 21:26:34,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413644049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:34,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305177649] [2021-06-05 21:26:34,956 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:34,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:26:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:35,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305177649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:35,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:35,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:35,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367314801] [2021-06-05 21:26:35,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:35,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:35,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:35,022 INFO L87 Difference]: Start difference. First operand 10467 states and 34016 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:35,196 INFO L93 Difference]: Finished difference Result 10785 states and 34763 transitions. [2021-06-05 21:26:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:35,211 INFO L225 Difference]: With dead ends: 10785 [2021-06-05 21:26:35,211 INFO L226 Difference]: Without dead ends: 10778 [2021-06-05 21:26:35,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:35,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-06-05 21:26:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 10467. [2021-06-05 21:26:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2500477737435505) internal successors, (34015), 10466 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34015 transitions. [2021-06-05 21:26:35,391 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34015 transitions. Word has length 21 [2021-06-05 21:26:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:35,391 INFO L482 AbstractCegarLoop]: Abstraction has 10467 states and 34015 transitions. [2021-06-05 21:26:35,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34015 transitions. [2021-06-05 21:26:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:35,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:35,397 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:35,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:35,597 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 196402649, now seen corresponding path program 214 times [2021-06-05 21:26:35,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:35,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241343929] [2021-06-05 21:26:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:35,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:35,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241343929] [2021-06-05 21:26:35,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241343929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:35,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274543031] [2021-06-05 21:26:35,661 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:35,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:35,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:35,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:35,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274543031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:35,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:35,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:35,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236051586] [2021-06-05 21:26:35,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:35,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:35,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:35,724 INFO L87 Difference]: Start difference. First operand 10467 states and 34015 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:35,899 INFO L93 Difference]: Finished difference Result 11060 states and 35467 transitions. [2021-06-05 21:26:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:35,915 INFO L225 Difference]: With dead ends: 11060 [2021-06-05 21:26:35,915 INFO L226 Difference]: Without dead ends: 11053 [2021-06-05 21:26:35,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11053 states. [2021-06-05 21:26:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11053 to 10479. [2021-06-05 21:26:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2499522809696506) internal successors, (34053), 10478 states have internal predecessors, (34053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34053 transitions. [2021-06-05 21:26:36,065 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34053 transitions. Word has length 21 [2021-06-05 21:26:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:36,065 INFO L482 AbstractCegarLoop]: Abstraction has 10479 states and 34053 transitions. [2021-06-05 21:26:36,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34053 transitions. [2021-06-05 21:26:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:36,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:36,071 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:36,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:36,272 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash -227908587, now seen corresponding path program 215 times [2021-06-05 21:26:36,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:36,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668605566] [2021-06-05 21:26:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:36,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:36,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668605566] [2021-06-05 21:26:36,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668605566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:36,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45475860] [2021-06-05 21:26:36,340 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:36,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:26:36,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:36,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45475860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:36,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:36,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:36,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132696975] [2021-06-05 21:26:36,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:36,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:36,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:36,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:36,405 INFO L87 Difference]: Start difference. First operand 10479 states and 34053 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:36,569 INFO L93 Difference]: Finished difference Result 10685 states and 34579 transitions. [2021-06-05 21:26:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:36,583 INFO L225 Difference]: With dead ends: 10685 [2021-06-05 21:26:36,583 INFO L226 Difference]: Without dead ends: 10678 [2021-06-05 21:26:36,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2021-06-05 21:26:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 10479. [2021-06-05 21:26:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2498568429089523) internal successors, (34052), 10478 states have internal predecessors, (34052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34052 transitions. [2021-06-05 21:26:36,722 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34052 transitions. Word has length 21 [2021-06-05 21:26:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:36,722 INFO L482 AbstractCegarLoop]: Abstraction has 10479 states and 34052 transitions. [2021-06-05 21:26:36,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34052 transitions. [2021-06-05 21:26:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:36,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:36,728 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:36,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3170 [2021-06-05 21:26:36,928 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1562888013, now seen corresponding path program 216 times [2021-06-05 21:26:36,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:36,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610364440] [2021-06-05 21:26:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:36,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:36,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610364440] [2021-06-05 21:26:36,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610364440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:36,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818032894] [2021-06-05 21:26:36,992 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:37,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:26:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818032894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:37,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:37,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831427016] [2021-06-05 21:26:37,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:37,058 INFO L87 Difference]: Start difference. First operand 10479 states and 34052 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:37,228 INFO L93 Difference]: Finished difference Result 11317 states and 36210 transitions. [2021-06-05 21:26:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:37,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:37,241 INFO L225 Difference]: With dead ends: 11317 [2021-06-05 21:26:37,241 INFO L226 Difference]: Without dead ends: 11310 [2021-06-05 21:26:37,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-06-05 21:26:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 10494. [2021-06-05 21:26:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2499761745925855) internal successors, (34102), 10493 states have internal predecessors, (34102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34102 transitions. [2021-06-05 21:26:37,386 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34102 transitions. Word has length 21 [2021-06-05 21:26:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:37,386 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34102 transitions. [2021-06-05 21:26:37,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34102 transitions. [2021-06-05 21:26:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:37,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:37,392 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:37,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3171,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:37,592 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1987199249, now seen corresponding path program 217 times [2021-06-05 21:26:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:37,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697952394] [2021-06-05 21:26:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:37,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:37,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697952394] [2021-06-05 21:26:37,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697952394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:37,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923324470] [2021-06-05 21:26:37,659 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:37,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:37,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923324470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:37,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:37,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:37,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284381321] [2021-06-05 21:26:37,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:37,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:37,721 INFO L87 Difference]: Start difference. First operand 10494 states and 34102 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:37,890 INFO L93 Difference]: Finished difference Result 10745 states and 34721 transitions. [2021-06-05 21:26:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:37,903 INFO L225 Difference]: With dead ends: 10745 [2021-06-05 21:26:37,903 INFO L226 Difference]: Without dead ends: 10738 [2021-06-05 21:26:37,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-06-05 21:26:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10494. [2021-06-05 21:26:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.249880872962928) internal successors, (34101), 10493 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34101 transitions. [2021-06-05 21:26:38,035 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34101 transitions. Word has length 21 [2021-06-05 21:26:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:38,035 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34101 transitions. [2021-06-05 21:26:38,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34101 transitions. [2021-06-05 21:26:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:38,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:38,041 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:38,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3172 [2021-06-05 21:26:38,242 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:38,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2039021619, now seen corresponding path program 218 times [2021-06-05 21:26:38,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:38,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354000674] [2021-06-05 21:26:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:38,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:38,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354000674] [2021-06-05 21:26:38,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354000674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:38,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882190623] [2021-06-05 21:26:38,315 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:38,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:38,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:38,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:38,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882190623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:38,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:38,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:38,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344132657] [2021-06-05 21:26:38,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:38,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:38,433 INFO L87 Difference]: Start difference. First operand 10494 states and 34101 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:38,586 INFO L93 Difference]: Finished difference Result 10713 states and 34665 transitions. [2021-06-05 21:26:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:38,601 INFO L225 Difference]: With dead ends: 10713 [2021-06-05 21:26:38,601 INFO L226 Difference]: Without dead ends: 10705 [2021-06-05 21:26:38,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2021-06-05 21:26:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10494. [2021-06-05 21:26:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2497855713332697) internal successors, (34100), 10493 states have internal predecessors, (34100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34100 transitions. [2021-06-05 21:26:38,735 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34100 transitions. Word has length 21 [2021-06-05 21:26:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:38,736 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34100 transitions. [2021-06-05 21:26:38,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34100 transitions. [2021-06-05 21:26:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:38,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:38,741 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:38,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-06-05 21:26:38,942 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash 355397379, now seen corresponding path program 219 times [2021-06-05 21:26:38,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:38,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242578380] [2021-06-05 21:26:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:38,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242578380] [2021-06-05 21:26:38,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242578380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610350534] [2021-06-05 21:26:38,998 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:39,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:26:39,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:39,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:39,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:39,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610350534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:39,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:39,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378976554] [2021-06-05 21:26:39,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:39,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:39,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:39,077 INFO L87 Difference]: Start difference. First operand 10494 states and 34100 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:39,174 INFO L93 Difference]: Finished difference Result 12763 states and 41190 transitions. [2021-06-05 21:26:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:26:39,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:39,191 INFO L225 Difference]: With dead ends: 12763 [2021-06-05 21:26:39,191 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 21:26:39,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 21:26:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 12391. [2021-06-05 21:26:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12391 states, 12390 states have (on average 3.2764326069410816) internal successors, (40595), 12390 states have internal predecessors, (40595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12391 states to 12391 states and 40595 transitions. [2021-06-05 21:26:39,361 INFO L78 Accepts]: Start accepts. Automaton has 12391 states and 40595 transitions. Word has length 21 [2021-06-05 21:26:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:39,361 INFO L482 AbstractCegarLoop]: Abstraction has 12391 states and 40595 transitions. [2021-06-05 21:26:39,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 12391 states and 40595 transitions. [2021-06-05 21:26:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:39,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:39,368 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:39,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:39,569 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2095489689, now seen corresponding path program 220 times [2021-06-05 21:26:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:39,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958610295] [2021-06-05 21:26:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:39,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:39,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958610295] [2021-06-05 21:26:39,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958610295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:39,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877058165] [2021-06-05 21:26:39,623 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:39,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:39,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877058165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:39,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:39,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:26:39,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803843429] [2021-06-05 21:26:39,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:39,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:39,682 INFO L87 Difference]: Start difference. First operand 12391 states and 40595 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:39,788 INFO L93 Difference]: Finished difference Result 12700 states and 41042 transitions. [2021-06-05 21:26:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:26:39,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:39,803 INFO L225 Difference]: With dead ends: 12700 [2021-06-05 21:26:39,804 INFO L226 Difference]: Without dead ends: 12700 [2021-06-05 21:26:39,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2021-06-05 21:26:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 12390. [2021-06-05 21:26:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.276293486157075) internal successors, (40590), 12389 states have internal predecessors, (40590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40590 transitions. [2021-06-05 21:26:39,976 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40590 transitions. Word has length 21 [2021-06-05 21:26:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:39,976 INFO L482 AbstractCegarLoop]: Abstraction has 12390 states and 40590 transitions. [2021-06-05 21:26:39,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40590 transitions. [2021-06-05 21:26:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:39,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:39,983 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:40,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3175 [2021-06-05 21:26:40,184 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:40,184 INFO L82 PathProgramCache]: Analyzing trace with hash -488864299, now seen corresponding path program 221 times [2021-06-05 21:26:40,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:40,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672807179] [2021-06-05 21:26:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:40,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:40,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672807179] [2021-06-05 21:26:40,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672807179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:40,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033130718] [2021-06-05 21:26:40,241 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:40,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:40,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:40,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:40,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:40,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033130718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:40,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:40,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:40,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476417935] [2021-06-05 21:26:40,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:40,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:40,297 INFO L87 Difference]: Start difference. First operand 12390 states and 40590 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:40,454 INFO L93 Difference]: Finished difference Result 12712 states and 41072 transitions. [2021-06-05 21:26:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:40,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:40,470 INFO L225 Difference]: With dead ends: 12712 [2021-06-05 21:26:40,470 INFO L226 Difference]: Without dead ends: 12710 [2021-06-05 21:26:40,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-06-05 21:26:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 12390. [2021-06-05 21:26:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.2761320526273305) internal successors, (40588), 12389 states have internal predecessors, (40588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40588 transitions. [2021-06-05 21:26:40,642 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40588 transitions. Word has length 21 [2021-06-05 21:26:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:40,642 INFO L482 AbstractCegarLoop]: Abstraction has 12390 states and 40588 transitions. [2021-06-05 21:26:40,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40588 transitions. [2021-06-05 21:26:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:40,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:40,649 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:40,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3176 [2021-06-05 21:26:40,850 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1000540697, now seen corresponding path program 222 times [2021-06-05 21:26:40,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:40,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014742167] [2021-06-05 21:26:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:40,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:40,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014742167] [2021-06-05 21:26:40,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014742167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:40,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719832185] [2021-06-05 21:26:40,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:40,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:26:40,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:40,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:40,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719832185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:40,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:40,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:26:40,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029207048] [2021-06-05 21:26:40,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:40,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:40,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:40,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:40,964 INFO L87 Difference]: Start difference. First operand 12390 states and 40588 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:41,138 INFO L93 Difference]: Finished difference Result 12717 states and 41077 transitions. [2021-06-05 21:26:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:41,204 INFO L225 Difference]: With dead ends: 12717 [2021-06-05 21:26:41,205 INFO L226 Difference]: Without dead ends: 12714 [2021-06-05 21:26:41,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12714 states. [2021-06-05 21:26:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12714 to 12399. [2021-06-05 21:26:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2764962090659786) internal successors, (40622), 12398 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40622 transitions. [2021-06-05 21:26:41,367 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40622 transitions. Word has length 21 [2021-06-05 21:26:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:41,367 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40622 transitions. [2021-06-05 21:26:41,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40622 transitions. [2021-06-05 21:26:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:41,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:41,374 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:41,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3177 [2021-06-05 21:26:41,575 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:41,575 INFO L82 PathProgramCache]: Analyzing trace with hash -72544683, now seen corresponding path program 223 times [2021-06-05 21:26:41,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:41,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901229146] [2021-06-05 21:26:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:41,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:41,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901229146] [2021-06-05 21:26:41,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901229146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:41,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174239064] [2021-06-05 21:26:41,628 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:41,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:41,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174239064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:41,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:41,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:26:41,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919196042] [2021-06-05 21:26:41,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:41,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:41,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:41,689 INFO L87 Difference]: Start difference. First operand 12399 states and 40622 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:41,863 INFO L93 Difference]: Finished difference Result 14561 states and 47167 transitions. [2021-06-05 21:26:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:26:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:41,882 INFO L225 Difference]: With dead ends: 14561 [2021-06-05 21:26:41,882 INFO L226 Difference]: Without dead ends: 14557 [2021-06-05 21:26:41,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14557 states. [2021-06-05 21:26:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14557 to 12399. [2021-06-05 21:26:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276415550895306) internal successors, (40621), 12398 states have internal predecessors, (40621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40621 transitions. [2021-06-05 21:26:42,062 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40621 transitions. Word has length 21 [2021-06-05 21:26:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:42,062 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40621 transitions. [2021-06-05 21:26:42,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40621 transitions. [2021-06-05 21:26:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:42,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:42,069 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:42,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:42,270 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1021546905, now seen corresponding path program 224 times [2021-06-05 21:26:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:42,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450966102] [2021-06-05 21:26:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:42,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:42,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450966102] [2021-06-05 21:26:42,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450966102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:42,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510946878] [2021-06-05 21:26:42,325 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:42,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:42,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:42,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:42,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:42,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510946878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:42,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:42,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:26:42,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016782223] [2021-06-05 21:26:42,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:42,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:42,385 INFO L87 Difference]: Start difference. First operand 12399 states and 40621 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:42,559 INFO L93 Difference]: Finished difference Result 14191 states and 45981 transitions. [2021-06-05 21:26:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:42,577 INFO L225 Difference]: With dead ends: 14191 [2021-06-05 21:26:42,578 INFO L226 Difference]: Without dead ends: 14186 [2021-06-05 21:26:42,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-06-05 21:26:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 12399. [2021-06-05 21:26:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276334892724633) internal successors, (40620), 12398 states have internal predecessors, (40620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40620 transitions. [2021-06-05 21:26:42,760 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40620 transitions. Word has length 21 [2021-06-05 21:26:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:42,760 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40620 transitions. [2021-06-05 21:26:42,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40620 transitions. [2021-06-05 21:26:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:42,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:42,767 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:42,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:42,967 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash 578647765, now seen corresponding path program 225 times [2021-06-05 21:26:42,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:42,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865482540] [2021-06-05 21:26:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:43,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865482540] [2021-06-05 21:26:43,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865482540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885451908] [2021-06-05 21:26:43,026 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:43,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:26:43,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:43,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885451908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:43,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:43,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:43,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163236483] [2021-06-05 21:26:43,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:43,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:43,089 INFO L87 Difference]: Start difference. First operand 12399 states and 40620 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:43,249 INFO L93 Difference]: Finished difference Result 13610 states and 44018 transitions. [2021-06-05 21:26:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:43,250 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:43,266 INFO L225 Difference]: With dead ends: 13610 [2021-06-05 21:26:43,266 INFO L226 Difference]: Without dead ends: 13604 [2021-06-05 21:26:43,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13604 states. [2021-06-05 21:26:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13604 to 12399. [2021-06-05 21:26:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2762542345539605) internal successors, (40619), 12398 states have internal predecessors, (40619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40619 transitions. [2021-06-05 21:26:43,442 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40619 transitions. Word has length 21 [2021-06-05 21:26:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:43,442 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40619 transitions. [2021-06-05 21:26:43,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40619 transitions. [2021-06-05 21:26:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:43,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:43,449 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:43,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:43,650 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash -266323687, now seen corresponding path program 226 times [2021-06-05 21:26:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:43,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618200964] [2021-06-05 21:26:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:43,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:43,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618200964] [2021-06-05 21:26:43,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618200964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:43,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118174277] [2021-06-05 21:26:43,715 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:43,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:43,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:43,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:43,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:43,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118174277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:43,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:43,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:43,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428968023] [2021-06-05 21:26:43,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:43,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:43,776 INFO L87 Difference]: Start difference. First operand 12399 states and 40619 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:43,983 INFO L93 Difference]: Finished difference Result 13653 states and 44081 transitions. [2021-06-05 21:26:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:44,001 INFO L225 Difference]: With dead ends: 13653 [2021-06-05 21:26:44,001 INFO L226 Difference]: Without dead ends: 13646 [2021-06-05 21:26:44,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13646 states. [2021-06-05 21:26:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13646 to 12454. [2021-06-05 21:26:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2765598650927488) internal successors, (40803), 12453 states have internal predecessors, (40803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40803 transitions. [2021-06-05 21:26:44,178 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40803 transitions. Word has length 21 [2021-06-05 21:26:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:44,178 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40803 transitions. [2021-06-05 21:26:44,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:44,178 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40803 transitions. [2021-06-05 21:26:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:44,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:44,185 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:44,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3181,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:44,386 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash -690634923, now seen corresponding path program 227 times [2021-06-05 21:26:44,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:44,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692392545] [2021-06-05 21:26:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:44,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:44,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692392545] [2021-06-05 21:26:44,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692392545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:44,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086662227] [2021-06-05 21:26:44,454 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:44,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:26:44,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:44,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:44,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086662227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:44,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:44,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:44,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008674527] [2021-06-05 21:26:44,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:44,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:44,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:44,518 INFO L87 Difference]: Start difference. First operand 12454 states and 40803 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:44,674 INFO L93 Difference]: Finished difference Result 12749 states and 41539 transitions. [2021-06-05 21:26:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:44,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:44,690 INFO L225 Difference]: With dead ends: 12749 [2021-06-05 21:26:44,690 INFO L226 Difference]: Without dead ends: 12742 [2021-06-05 21:26:44,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2021-06-05 21:26:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 12454. [2021-06-05 21:26:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.276479563157472) internal successors, (40802), 12453 states have internal predecessors, (40802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40802 transitions. [2021-06-05 21:26:44,858 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40802 transitions. Word has length 21 [2021-06-05 21:26:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:44,858 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40802 transitions. [2021-06-05 21:26:44,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40802 transitions. [2021-06-05 21:26:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:44,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:44,866 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:45,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-06-05 21:26:45,066 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash -959381351, now seen corresponding path program 228 times [2021-06-05 21:26:45,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:45,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802702914] [2021-06-05 21:26:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:45,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:45,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802702914] [2021-06-05 21:26:45,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802702914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:45,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496861726] [2021-06-05 21:26:45,140 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:45,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:26:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:45,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496861726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:45,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:45,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:45,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872567850] [2021-06-05 21:26:45,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:45,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:45,207 INFO L87 Difference]: Start difference. First operand 12454 states and 40802 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:45,370 INFO L93 Difference]: Finished difference Result 12726 states and 41484 transitions. [2021-06-05 21:26:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:45,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:45,388 INFO L225 Difference]: With dead ends: 12726 [2021-06-05 21:26:45,388 INFO L226 Difference]: Without dead ends: 12718 [2021-06-05 21:26:45,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-06-05 21:26:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 12454. [2021-06-05 21:26:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763992612221955) internal successors, (40801), 12453 states have internal predecessors, (40801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40801 transitions. [2021-06-05 21:26:45,558 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40801 transitions. Word has length 21 [2021-06-05 21:26:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:45,558 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40801 transitions. [2021-06-05 21:26:45,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40801 transitions. [2021-06-05 21:26:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:26:45,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:45,566 INFO L554 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:45,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3183 [2021-06-05 21:26:45,766 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash -700586027, now seen corresponding path program 229 times [2021-06-05 21:26:45,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:45,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275290578] [2021-06-05 21:26:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:45,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:45,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275290578] [2021-06-05 21:26:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275290578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:45,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631190265] [2021-06-05 21:26:45,843 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:45,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:26:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:45,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631190265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:45,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:45,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:26:45,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960098685] [2021-06-05 21:26:45,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:45,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:45,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:45,904 INFO L87 Difference]: Start difference. First operand 12454 states and 40801 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:46,062 INFO L93 Difference]: Finished difference Result 12691 states and 41422 transitions. [2021-06-05 21:26:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:26:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:46,078 INFO L225 Difference]: With dead ends: 12691 [2021-06-05 21:26:46,078 INFO L226 Difference]: Without dead ends: 12682 [2021-06-05 21:26:46,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:26:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2021-06-05 21:26:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 12454. [2021-06-05 21:26:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763189592869186) internal successors, (40800), 12453 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40800 transitions. [2021-06-05 21:26:46,244 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40800 transitions. Word has length 21 [2021-06-05 21:26:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:46,244 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40800 transitions. [2021-06-05 21:26:46,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40800 transitions. [2021-06-05 21:26:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:46,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:46,251 INFO L554 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:46,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 21:26:46,451 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash 655261526, now seen corresponding path program 230 times [2021-06-05 21:26:46,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:46,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936001546] [2021-06-05 21:26:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:26:46,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:46,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936001546] [2021-06-05 21:26:46,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936001546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:46,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27004778] [2021-06-05 21:26:46,570 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:46,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:26:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:26:46,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27004778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:46,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:46,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:26:46,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439031589] [2021-06-05 21:26:46,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:26:46,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:26:46,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:26:46,725 INFO L87 Difference]: Start difference. First operand 12454 states and 40800 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 21:26:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:46,934 INFO L93 Difference]: Finished difference Result 16028 states and 51289 transitions. [2021-06-05 21:26:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:26:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 22 [2021-06-05 21:26:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:46,955 INFO L225 Difference]: With dead ends: 16028 [2021-06-05 21:26:46,955 INFO L226 Difference]: Without dead ends: 16028 [2021-06-05 21:26:46,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:26:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16028 states. [2021-06-05 21:26:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16028 to 12891. [2021-06-05 21:26:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 3.2592707525213345) internal successors, (42012), 12890 states have internal predecessors, (42012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 42012 transitions. [2021-06-05 21:26:47,147 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 42012 transitions. Word has length 22 [2021-06-05 21:26:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:47,148 INFO L482 AbstractCegarLoop]: Abstraction has 12891 states and 42012 transitions. [2021-06-05 21:26:47,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 21:26:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 42012 transitions. [2021-06-05 21:26:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:26:47,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:47,156 INFO L554 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:47,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3185 [2021-06-05 21:26:47,357 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:47,357 INFO L82 PathProgramCache]: Analyzing trace with hash -548365066, now seen corresponding path program 231 times [2021-06-05 21:26:47,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:47,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127298640] [2021-06-05 21:26:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:26:47,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:47,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127298640] [2021-06-05 21:26:47,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127298640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:47,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289462075] [2021-06-05 21:26:47,511 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:47,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:26:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:26:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:26:47,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289462075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:47,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:47,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 21:26:47,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098107437] [2021-06-05 21:26:47,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:26:47,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:26:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:47,732 INFO L87 Difference]: Start difference. First operand 12891 states and 42012 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:47,959 INFO L93 Difference]: Finished difference Result 17733 states and 56311 transitions. [2021-06-05 21:26:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:26:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:26:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:47,989 INFO L225 Difference]: With dead ends: 17733 [2021-06-05 21:26:47,989 INFO L226 Difference]: Without dead ends: 17728 [2021-06-05 21:26:47,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17728 states. [2021-06-05 21:26:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17728 to 13517. [2021-06-05 21:26:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13517 states, 13516 states have (on average 3.222033145901154) internal successors, (43549), 13516 states have internal predecessors, (43549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13517 states to 13517 states and 43549 transitions. [2021-06-05 21:26:48,204 INFO L78 Accepts]: Start accepts. Automaton has 13517 states and 43549 transitions. Word has length 23 [2021-06-05 21:26:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:48,204 INFO L482 AbstractCegarLoop]: Abstraction has 13517 states and 43549 transitions. [2021-06-05 21:26:48,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 13517 states and 43549 transitions. [2021-06-05 21:26:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:26:48,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:48,214 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:48,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3186 [2021-06-05 21:26:48,414 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash 793916246, now seen corresponding path program 232 times [2021-06-05 21:26:48,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:48,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689941053] [2021-06-05 21:26:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:48,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:48,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689941053] [2021-06-05 21:26:48,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689941053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:48,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635993526] [2021-06-05 21:26:48,518 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:48,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:48,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:26:48,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:49,135 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-06-05 21:26:49,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:26:49,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-06-05 21:26:50,026 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 335 [2021-06-05 21:26:50,272 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 347 [2021-06-05 21:26:50,917 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 322 [2021-06-05 21:26:51,539 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 445 [2021-06-05 21:26:51,890 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 457 [2021-06-05 21:26:52,631 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 680 [2021-06-05 21:26:53,395 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 709 [2021-06-05 21:26:54,356 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 288 [2021-06-05 21:26:54,545 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 398 [2021-06-05 21:26:54,786 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 410 [2021-06-05 21:26:56,158 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 278 [2021-06-05 21:26:56,358 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 378 [2021-06-05 21:26:56,663 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 524 [2021-06-05 21:26:57,104 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 536 [2021-06-05 21:26:57,838 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 787 [2021-06-05 21:26:58,792 WARN L205 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 978 DAG size of output: 815 [2021-06-05 21:27:00,967 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 1638 DAG size of output: 1292 [2021-06-05 21:27:01,507 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 230 [2021-06-05 21:27:02,417 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 393 [2021-06-05 21:27:02,742 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 535 [2021-06-05 21:27:03,227 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 545 [2021-06-05 21:27:04,235 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 302 [2021-06-05 21:27:04,575 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 441 [2021-06-05 21:27:04,858 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 451 [2021-06-05 21:27:05,701 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 1021 DAG size of output: 856 [2021-06-05 21:27:07,008 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1046 DAG size of output: 882 [2021-06-05 21:27:07,745 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 329 [2021-06-05 21:27:08,275 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2021-06-05 21:27:08,865 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 453 [2021-06-05 21:27:09,280 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 619 [2021-06-05 21:27:09,823 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 717 DAG size of output: 629 [2021-06-05 21:27:10,415 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 316 [2021-06-05 21:27:11,183 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 359 [2021-06-05 21:27:11,481 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 517 [2021-06-05 21:27:11,890 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 527 [2021-06-05 21:27:12,951 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1157 DAG size of output: 982 [2021-06-05 21:27:14,226 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1181 DAG size of output: 1006 [2021-06-05 21:27:16,757 WARN L205 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 2034 DAG size of output: 1643 [2021-06-05 21:27:21,699 WARN L205 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 3473 DAG size of output: 2729 [2021-06-05 21:27:26,623 WARN L205 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 3473 DAG size of output: 2729 [2021-06-05 21:27:32,541 WARN L205 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 3492 DAG size of output: 2748 [2021-06-05 21:27:45,898 WARN L205 SmtUtils]: Spent 13.34 s on a formula simplification. DAG size of input: 2750 DAG size of output: 3883 [2021-06-05 21:27:56,061 WARN L205 SmtUtils]: Spent 10.14 s on a formula simplification. DAG size of input: 2554 DAG size of output: 2416 [2021-06-05 21:28:04,802 WARN L205 SmtUtils]: Spent 8.73 s on a formula simplification. DAG size of input: 2374 DAG size of output: 2990 [2021-06-05 21:28:04,970 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 1127 [2021-06-05 21:28:05,487 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 622 [2021-06-05 21:28:05,912 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 437 [2021-06-05 21:28:06,126 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 378 [2021-06-05 21:28:07,036 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 247 [2021-06-05 21:28:07,695 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 232 [2021-06-05 21:28:08,378 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 282 [2021-06-05 21:28:08,592 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 360 [2021-06-05 21:28:08,889 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 410 [2021-06-05 21:28:09,570 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 228 [2021-06-05 21:28:09,859 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 266 [2021-06-05 21:28:10,046 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 309 [2021-06-05 21:28:10,869 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 705 [2021-06-05 21:28:11,651 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 723 [2021-06-05 21:28:12,800 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 904 DAG size of output: 881 [2021-06-05 21:28:14,209 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 912 DAG size of output: 885 [2021-06-05 21:28:15,993 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1004 DAG size of output: 1043 [2021-06-05 21:28:16,314 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 390 [2021-06-05 21:28:16,525 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 358 [2021-06-05 21:28:16,713 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 356 [2021-06-05 21:28:17,777 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 274 [2021-06-05 21:28:19,024 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 420 [2021-06-05 21:28:19,344 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 429 [2021-06-05 21:28:19,785 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 437 [2021-06-05 21:28:20,422 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 573 [2021-06-05 21:28:21,360 WARN L205 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 711 [2021-06-05 21:28:22,558 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 806 DAG size of output: 827 [2021-06-05 21:28:25,901 WARN L205 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 1599 DAG size of output: 1609 [2021-06-05 21:28:29,742 WARN L205 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 1684 DAG size of output: 1612 [2021-06-05 21:28:31,420 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 734 DAG size of output: 755 [2021-06-05 21:28:32,592 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 686 DAG size of output: 850 [2021-06-05 21:28:33,608 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 677 DAG size of output: 885 [2021-06-05 21:28:34,553 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 830 [2021-06-05 21:28:35,570 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 669 DAG size of output: 809 [2021-06-05 21:28:35,966 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 523 [2021-06-05 21:28:36,487 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 543 [2021-06-05 21:28:37,126 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 230 [2021-06-05 21:28:37,641 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 280 [2021-06-05 21:28:37,809 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 286 [2021-06-05 21:28:38,171 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 513 [2021-06-05 21:28:39,602 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 323 [2021-06-05 21:28:39,806 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 332 [2021-06-05 21:28:40,467 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 705 [2021-06-05 21:28:41,319 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 819 DAG size of output: 712 [2021-06-05 21:28:41,628 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 491 [2021-06-05 21:28:42,865 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 357 [2021-06-05 21:28:43,081 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 366 [2021-06-05 21:28:43,340 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 374 [2021-06-05 21:28:43,879 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 501 [2021-06-05 21:28:45,185 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 462 [2021-06-05 21:28:45,857 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 655 [2021-06-05 21:28:47,639 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1360 DAG size of output: 1178 [2021-06-05 21:28:48,975 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 275 [2021-06-05 21:28:49,606 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 456 [2021-06-05 21:28:49,932 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 465 [2021-06-05 21:28:50,314 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 472 [2021-06-05 21:28:51,990 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 389 [2021-06-05 21:28:52,238 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 399 [2021-06-05 21:28:52,570 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 406 [2021-06-05 21:28:53,414 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 740 [2021-06-05 21:28:56,226 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 1844 DAG size of output: 1588 [2021-06-05 21:29:00,131 WARN L205 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 2295 DAG size of output: 2037 [2021-06-05 21:29:05,252 WARN L205 SmtUtils]: Spent 5.11 s on a formula simplification. DAG size of input: 2693 DAG size of output: 2396 [2021-06-05 21:29:11,386 WARN L205 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 2993 DAG size of output: 2672 [2021-06-05 21:29:18,315 WARN L205 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 3079 DAG size of output: 2675 [2021-06-05 21:29:30,335 WARN L205 SmtUtils]: Spent 12.00 s on a formula simplification. DAG size of input: 4511 DAG size of output: 4036 [2021-06-05 21:29:39,061 WARN L205 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 2123 DAG size of output: 2258 [2021-06-05 21:29:39,259 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 1944 [2021-06-05 21:29:39,368 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 1194 [2021-06-05 21:29:40,211 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 896 [2021-06-05 21:29:40,325 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 703 [2021-06-05 21:29:41,134 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 936 [2021-06-05 21:29:42,029 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 904 [2021-06-05 21:29:43,211 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 307 [2021-06-05 21:29:44,377 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 303 [2021-06-05 21:29:45,186 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 250 [2021-06-05 21:29:46,243 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 312 [2021-06-05 21:29:46,608 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 435 [2021-06-05 21:29:47,540 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 726 [2021-06-05 21:29:48,590 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 752 [2021-06-05 21:29:50,353 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 1436 DAG size of output: 1169 [2021-06-05 21:29:53,014 WARN L205 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 1888 DAG size of output: 1541 [2021-06-05 21:29:56,100 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 1897 DAG size of output: 1548 [2021-06-05 21:30:00,003 WARN L205 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 2194 DAG size of output: 1841 [2021-06-05 21:30:00,778 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 645 DAG size of output: 715 [2021-06-05 21:30:02,114 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 640 DAG size of output: 860 [2021-06-05 21:30:02,588 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 624 [2021-06-05 21:30:02,892 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 524 [2021-06-05 21:30:03,078 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 381 [2021-06-05 21:30:03,225 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 358 [2021-06-05 21:30:04,060 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 235 [2021-06-05 21:30:04,930 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 386 [2021-06-05 21:30:05,544 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 234 [2021-06-05 21:30:06,541 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 282 [2021-06-05 21:30:06,720 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 308 [2021-06-05 21:30:07,532 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 497 [2021-06-05 21:30:08,267 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 844 DAG size of output: 680 [2021-06-05 21:30:09,366 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1059 DAG size of output: 896 [2021-06-05 21:30:10,778 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1274 DAG size of output: 1024 [2021-06-05 21:30:12,214 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 1307 DAG size of output: 1050 [2021-06-05 21:30:14,131 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 1584 DAG size of output: 1241 [2021-06-05 21:30:16,409 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 1592 DAG size of output: 1248 [2021-06-05 21:30:19,569 WARN L205 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 1990 DAG size of output: 1585 [2021-06-05 21:30:23,721 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 2392 DAG size of output: 2000 [2021-06-05 21:30:32,814 WARN L205 SmtUtils]: Spent 9.08 s on a formula simplification. DAG size of input: 4262 DAG size of output: 3485 [2021-06-05 21:30:34,308 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 961 DAG size of output: 1156 [2021-06-05 21:30:34,745 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 504 [2021-06-05 21:30:34,879 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 357 [2021-06-05 21:30:36,049 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 338 [2021-06-05 21:30:36,338 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 474 [2021-06-05 21:30:36,721 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 517 [2021-06-05 21:30:37,271 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 619 [2021-06-05 21:30:37,421 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 338 [2021-06-05 21:30:37,941 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 274 [2021-06-05 21:30:38,398 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 268 [2021-06-05 21:30:38,932 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 280 [2021-06-05 21:30:39,099 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 330 [2021-06-05 21:30:39,374 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 412 [2021-06-05 21:30:39,949 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 715 DAG size of output: 646 [2021-06-05 21:30:40,852 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 251 [2021-06-05 21:30:41,550 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 405 [2021-06-05 21:30:42,624 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 922 DAG size of output: 836 [2021-06-05 21:30:44,303 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 1275 DAG size of output: 1138 [2021-06-05 21:30:46,128 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 1319 DAG size of output: 1174 [2021-06-05 21:30:48,296 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 1510 DAG size of output: 1345 [2021-06-05 21:30:50,825 WARN L205 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 1517 DAG size of output: 1351 [2021-06-05 21:30:51,573 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 654 [2021-06-05 21:30:52,036 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 516 [2021-06-05 21:30:54,122 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 302 [2021-06-05 21:30:54,466 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 407 [2021-06-05 21:30:54,959 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 535 [2021-06-05 21:30:55,498 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 553 [2021-06-05 21:30:56,152 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 562 [2021-06-05 21:30:57,168 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 845 DAG size of output: 782 [2021-06-05 21:30:58,629 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1132 DAG size of output: 1059 [2021-06-05 21:31:03,261 WARN L205 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 2465 DAG size of output: 2167 [2021-06-05 21:31:09,345 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 2888 DAG size of output: 2603 [2021-06-05 21:31:26,267 WARN L205 SmtUtils]: Spent 16.90 s on a formula simplification. DAG size of input: 6771 DAG size of output: 5743 [2021-06-05 21:31:45,551 WARN L205 SmtUtils]: Spent 19.25 s on a formula simplification. DAG size of input: 7100 DAG size of output: 5765 [2021-06-05 21:32:16,549 WARN L205 SmtUtils]: Spent 30.96 s on a formula simplification. DAG size of input: 10885 DAG size of output: 8680 [2021-06-05 21:32:52,257 WARN L205 SmtUtils]: Spent 35.65 s on a formula simplification. DAG size of input: 10943 DAG size of output: 8731 [2021-06-05 21:32:52,551 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 2534 [2021-06-05 21:32:56,220 WARN L205 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 1494 DAG size of output: 1464 [2021-06-05 21:32:59,478 WARN L205 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 1448 DAG size of output: 1789 [2021-06-05 21:33:01,477 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 704 DAG size of output: 759 [2021-06-05 21:33:02,880 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 660 DAG size of output: 862 [2021-06-05 21:33:04,036 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 649 DAG size of output: 869 [2021-06-05 21:33:04,773 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 506 [2021-06-05 21:33:05,341 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 470 [2021-06-05 21:33:07,113 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 343 [2021-06-05 21:33:08,309 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 298 [2021-06-05 21:33:08,610 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 486 [2021-06-05 21:33:08,921 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 492 [2021-06-05 21:33:09,330 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 499 [2021-06-05 21:33:10,166 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 736 [2021-06-05 21:33:10,582 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 455 [2021-06-05 21:33:12,470 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 318 [2021-06-05 21:33:12,806 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 523 [2021-06-05 21:33:13,149 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 532 [2021-06-05 21:33:13,596 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 538 [2021-06-05 21:33:15,080 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 1311 DAG size of output: 1072 [2021-06-05 21:33:17,525 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 1688 DAG size of output: 1437 [2021-06-05 21:33:20,797 WARN L205 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 1981 DAG size of output: 1716 [2021-06-05 21:33:24,507 WARN L205 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 2095 DAG size of output: 1719 [2021-06-05 21:33:30,850 WARN L205 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 1318 DAG size of output: 1377 [2021-06-05 21:33:33,306 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 1157 DAG size of output: 1494 [2021-06-05 21:33:37,634 WARN L205 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 1152 DAG size of output: 1635 [2021-06-05 21:33:40,370 WARN L205 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1512 [2021-06-05 21:33:41,733 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 587 DAG size of output: 789 [2021-06-05 21:33:42,317 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 449 [2021-06-05 21:33:42,645 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 468 [2021-06-05 21:33:43,016 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 384 [2021-06-05 21:33:44,087 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 314 [2021-06-05 21:33:44,233 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 325 [2021-06-05 21:33:44,653 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 418 [2021-06-05 21:33:45,586 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 294 [2021-06-05 21:33:45,702 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 302 [2021-06-05 21:33:46,061 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 344 [2021-06-05 21:33:46,384 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 455 [2021-06-05 21:33:47,770 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 303 [2021-06-05 21:33:47,906 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 314 [2021-06-05 21:33:48,453 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 646 [2021-06-05 21:33:49,166 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 653 [2021-06-05 21:33:51,721 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 364 [2021-06-05 21:33:51,987 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 375 [2021-06-05 21:33:52,263 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 380 [2021-06-05 21:33:53,413 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1152 DAG size of output: 887 [2021-06-05 21:33:55,547 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 1588 DAG size of output: 1285 [2021-06-05 21:33:59,657 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 2577 DAG size of output: 2019 [2021-06-05 21:34:06,087 WARN L205 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 3398 DAG size of output: 2696 [2021-06-05 21:34:14,625 WARN L205 SmtUtils]: Spent 8.52 s on a formula simplification. DAG size of input: 4036 DAG size of output: 3293 [2021-06-05 21:34:24,356 WARN L205 SmtUtils]: Spent 9.71 s on a formula simplification. DAG size of input: 4276 DAG size of output: 3318 [2021-06-05 21:34:39,486 WARN L205 SmtUtils]: Spent 15.11 s on a formula simplification. DAG size of input: 5882 DAG size of output: 4640 [2021-06-05 21:34:57,080 WARN L205 SmtUtils]: Spent 17.57 s on a formula simplification. DAG size of input: 5909 DAG size of output: 4666 [2021-06-05 21:35:00,787 WARN L205 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 1241 DAG size of output: 1212 [2021-06-05 21:35:03,182 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 1196 DAG size of output: 1415 [2021-06-05 21:35:04,022 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 621 [2021-06-05 21:35:04,657 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 660 [2021-06-05 21:35:05,660 WARN L205 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 681 [2021-06-05 21:35:06,058 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 486 [2021-06-05 21:35:06,215 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 373 [2021-06-05 21:35:06,407 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 335 [2021-06-05 21:35:06,511 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 332 [2021-06-05 21:35:06,657 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 315 [2021-06-05 21:35:07,775 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 255 [2021-06-05 21:35:08,325 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 312 [2021-06-05 21:35:08,610 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 421 [2021-06-05 21:35:08,904 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 430 [2021-06-05 21:35:09,350 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 539 [2021-06-05 21:35:10,083 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 712 [2021-06-05 21:35:10,918 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 719 [2021-06-05 21:35:12,329 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1112 DAG size of output: 993 [2021-06-05 21:35:14,294 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 1316 DAG size of output: 1226 [2021-06-05 21:35:16,567 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 1408 DAG size of output: 1229 [2021-06-05 21:35:17,626 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 639 DAG size of output: 728 [2021-06-05 21:35:18,259 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 687 [2021-06-05 21:35:18,708 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 535 [2021-06-05 21:35:19,374 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 240 [2021-06-05 21:35:19,728 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 301 [2021-06-05 21:35:20,411 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-06-05 21:35:20,774 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 421 [2021-06-05 21:35:21,482 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 261 [2021-06-05 21:35:22,183 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 268 [2021-06-05 21:35:22,372 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 331 [2021-06-05 21:35:23,131 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 267 [2021-06-05 21:35:23,732 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 291 [2021-06-05 21:35:24,071 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 432 [2021-06-05 21:35:24,640 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 543 [2021-06-05 21:35:25,796 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1057 DAG size of output: 892 [2021-06-05 21:35:27,005 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1074 DAG size of output: 910 [2021-06-05 21:35:28,591 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1280 DAG size of output: 1096 [2021-06-05 21:35:30,437 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1287 DAG size of output: 1103 [2021-06-05 21:35:32,927 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 1531 DAG size of output: 1375 [2021-06-05 21:35:35,811 WARN L205 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 1682 DAG size of output: 1378 [2021-06-05 21:35:41,477 WARN L205 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 2845 DAG size of output: 2269 [2021-06-05 21:35:41,791 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 443 [2021-06-05 21:35:42,230 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 443 [2021-06-05 21:35:42,536 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 405 [2021-06-05 21:35:42,948 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 432 [2021-06-05 21:35:43,323 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 439 [2021-06-05 21:35:45,429 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 338 [2021-06-05 21:35:45,897 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 479 [2021-06-05 21:35:46,436 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 490 [2021-06-05 21:35:47,308 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 647 [2021-06-05 21:35:48,487 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 791 DAG size of output: 747 [2021-06-05 21:35:49,851 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 870 DAG size of output: 750 [2021-06-05 21:35:49,995 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 371 [2021-06-05 21:35:50,300 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 398 [2021-06-05 21:35:50,482 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 358 [2021-06-05 21:35:52,042 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 316 [2021-06-05 21:35:52,222 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 324 [2021-06-05 21:35:52,620 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 476 [2021-06-05 21:35:53,225 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 609 [2021-06-05 21:35:53,910 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 612 [2021-06-05 21:35:54,753 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 617 [2021-06-05 21:35:57,383 WARN L205 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 1361 DAG size of output: 1160 [2021-06-05 21:36:06,711 WARN L205 SmtUtils]: Spent 9.32 s on a formula simplification. DAG size of input: 3674 DAG size of output: 3077 [2021-06-05 21:36:17,658 WARN L205 SmtUtils]: Spent 10.93 s on a formula simplification. DAG size of input: 3702 DAG size of output: 3106 [2021-06-05 21:36:50,103 WARN L205 SmtUtils]: Spent 32.42 s on a formula simplification. DAG size of input: 9204 DAG size of output: 7360 [2021-06-05 21:37:59,880 WARN L205 SmtUtils]: Spent 1.16 m on a formula simplification. DAG size of input: 17329 DAG size of output: 12965 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown