/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:49:45,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:49:45,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:49:45,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:49:45,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 19:49:45,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 19:49:45,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 19:49:45,755 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 [2021-08-12 19:49:45,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:49:45,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:49:45,792 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:49:45,792 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:49:45,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:49:45,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:49:45,795 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:49:45,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:49:45,795 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:49:45,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:49:45,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:49:45,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:49:45,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:49:45,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:49:45,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:49:45,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:49:45,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:49:45,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:49:45,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:49:45,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:49:45,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:49:45,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:49:45,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:49:45,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:49:45,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:49:45,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:49:45,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:49:45,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:49:45,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:49:45,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:49:45,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:49:46,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:49:46,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:49:46,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:49:46,112 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:49:46,113 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:49:46,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-08-12 19:49:46,114 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-08-12 19:49:46,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:49:46,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:49:46,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:49:46,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:49:46,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:49:46,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:49:46,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:49:46,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:49:46,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:49:46,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/1) ... [2021-08-12 19:49:46,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:49:46,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:49:46,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:49:46,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:49:46,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (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 [2021-08-12 19:49:46,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:49:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:49:46,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:49:46,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:49:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:49:46,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:49:46,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:49:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:49:46,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:49:46,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:49:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:49:46,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:49:46,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-12 19:49:46,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-12 19:49:46,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-12 19:49:46,250 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:49:46,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:49:46,444 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:49:46,445 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:49:46 BoogieIcfgContainer [2021-08-12 19:49:46,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:49:46,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:49:46,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:49:46,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:49:46,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:49:46" (1/2) ... [2021-08-12 19:49:46,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a794bbd and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:49:46, skipping insertion in model container [2021-08-12 19:49:46,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:49:46" (2/2) ... [2021-08-12 19:49:46,452 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-08-12 19:49:46,457 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:49:46,458 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:49:46,459 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:49:46,498 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-12 19:49:46,527 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-12 19:49:46,544 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:49:46,545 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:49:46,545 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:49:46,545 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:49:46,545 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:49:46,545 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:49:46,545 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:49:46,545 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:49:46,568 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-08-12 19:49:46,712 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:49:46,743 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:46,744 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:46,744 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-08-12 19:49:46,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:46,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242157001] [2021-08-12 19:49:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:46,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:46,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242157001] [2021-08-12 19:49:46,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242157001] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:46,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:49:46,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:49:46,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470612167] [2021-08-12 19:49:46,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:49:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:46,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:49:46,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:49:46,972 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 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) [2021-08-12 19:49:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:47,108 INFO L93 Difference]: Finished difference Result 1240 states and 4848 transitions. [2021-08-12 19:49:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:49:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:49:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:47,148 INFO L225 Difference]: With dead ends: 1240 [2021-08-12 19:49:47,149 INFO L226 Difference]: Without dead ends: 1109 [2021-08-12 19:49:47,154 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:49:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-12 19:49:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-08-12 19:49:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-08-12 19:49:47,279 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-08-12 19:49:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:47,280 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-08-12 19:49:47,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-08-12 19:49:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-08-12 19:49:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:49:47,284 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:47,284 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:47,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:49:47,285 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:47,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-08-12 19:49:47,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:47,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051897567] [2021-08-12 19:49:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:47,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:47,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051897567] [2021-08-12 19:49:47,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051897567] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:47,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:49:47,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:49:47,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781600241] [2021-08-12 19:49:47,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:49:47,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:49:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:49:47,336 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-12 19:49:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:47,448 INFO L93 Difference]: Finished difference Result 2240 states and 8718 transitions. [2021-08-12 19:49:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:49:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-08-12 19:49:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:47,462 INFO L225 Difference]: With dead ends: 2240 [2021-08-12 19:49:47,462 INFO L226 Difference]: Without dead ends: 1418 [2021-08-12 19:49:47,465 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:49:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-08-12 19:49:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-08-12 19:49:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-08-12 19:49:47,520 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-08-12 19:49:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:47,520 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-08-12 19:49:47,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-12 19:49:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-08-12 19:49:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:49:47,524 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:47,524 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:47,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:49:47,525 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:47,526 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-08-12 19:49:47,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:47,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864230641] [2021-08-12 19:49:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:47,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:47,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864230641] [2021-08-12 19:49:47,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864230641] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:47,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:49:47,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:49:47,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628385254] [2021-08-12 19:49:47,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:49:47,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:49:47,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:49:47,603 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-12 19:49:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:47,732 INFO L93 Difference]: Finished difference Result 2786 states and 10804 transitions. [2021-08-12 19:49:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:49:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-08-12 19:49:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:47,752 INFO L225 Difference]: With dead ends: 2786 [2021-08-12 19:49:47,752 INFO L226 Difference]: Without dead ends: 1875 [2021-08-12 19:49:47,755 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:49:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-08-12 19:49:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-08-12 19:49:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-08-12 19:49:47,870 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-08-12 19:49:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:47,870 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-08-12 19:49:47,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-08-12 19:49:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-08-12 19:49:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:49:47,876 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:47,877 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:47,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:49:47,877 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:47,878 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-08-12 19:49:47,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:47,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190076465] [2021-08-12 19:49:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:47,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:47,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190076465] [2021-08-12 19:49:47,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190076465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:47,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642799491] [2021-08-12 19:49:47,924 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 [2021-08-12 19:49:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:48,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:49:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:48,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642799491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:48,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:48,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-12 19:49:48,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457741678] [2021-08-12 19:49:48,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:49:48,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:49:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:49:48,149 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:48,380 INFO L93 Difference]: Finished difference Result 2935 states and 10846 transitions. [2021-08-12 19:49:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:49:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:49:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:48,397 INFO L225 Difference]: With dead ends: 2935 [2021-08-12 19:49:48,397 INFO L226 Difference]: Without dead ends: 2108 [2021-08-12 19:49:48,399 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:49:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-08-12 19:49:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-08-12 19:49:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-08-12 19:49:48,469 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-08-12 19:49:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:48,470 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-08-12 19:49:48,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-08-12 19:49:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:49:48,474 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:48,474 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:48,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:49:48,681 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:48,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1771388146, now seen corresponding path program 1 times [2021-08-12 19:49:48,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:48,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480312960] [2021-08-12 19:49:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:48,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:48,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480312960] [2021-08-12 19:49:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480312960] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:49:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:49:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292015499] [2021-08-12 19:49:48,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:49:48,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:49:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:49:48,726 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2021-08-12 19:49:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:48,904 INFO L93 Difference]: Finished difference Result 2846 states and 10362 transitions. [2021-08-12 19:49:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:49:48,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2021-08-12 19:49:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:48,920 INFO L225 Difference]: With dead ends: 2846 [2021-08-12 19:49:48,921 INFO L226 Difference]: Without dead ends: 1860 [2021-08-12 19:49:48,923 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:49:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-08-12 19:49:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-08-12 19:49:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-08-12 19:49:49,010 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-08-12 19:49:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:49,011 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-08-12 19:49:49,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2021-08-12 19:49:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-08-12 19:49:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:49:49,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:49,017 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:49,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 19:49:49,017 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:49,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2115354510, now seen corresponding path program 2 times [2021-08-12 19:49:49,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:49,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30050852] [2021-08-12 19:49:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:49,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:49,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30050852] [2021-08-12 19:49:49,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30050852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:49,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:49:49,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:49:49,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446038019] [2021-08-12 19:49:49,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:49:49,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:49,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:49:49,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:49:49,096 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2021-08-12 19:49:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:49,248 INFO L93 Difference]: Finished difference Result 2170 states and 7854 transitions. [2021-08-12 19:49:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:49:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2021-08-12 19:49:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:49,261 INFO L225 Difference]: With dead ends: 2170 [2021-08-12 19:49:49,261 INFO L226 Difference]: Without dead ends: 1308 [2021-08-12 19:49:49,263 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:49:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-08-12 19:49:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-08-12 19:49:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-08-12 19:49:49,315 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-08-12 19:49:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:49,315 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-08-12 19:49:49,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2021-08-12 19:49:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-08-12 19:49:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:49:49,319 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:49,319 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:49,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 19:49:49,320 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-08-12 19:49:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:49,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084244040] [2021-08-12 19:49:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:49,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084244040] [2021-08-12 19:49:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084244040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:49,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:49:49,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:49:49,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830984996] [2021-08-12 19:49:49,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:49:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:49,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:49:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:49:49,352 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2021-08-12 19:49:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:49,440 INFO L93 Difference]: Finished difference Result 1295 states and 4573 transitions. [2021-08-12 19:49:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:49:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2021-08-12 19:49:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:49,450 INFO L225 Difference]: With dead ends: 1295 [2021-08-12 19:49:49,450 INFO L226 Difference]: Without dead ends: 1120 [2021-08-12 19:49:49,451 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:49:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-08-12 19:49:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-08-12 19:49:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-08-12 19:49:49,523 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-08-12 19:49:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:49,523 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-08-12 19:49:49,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2021-08-12 19:49:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-08-12 19:49:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:49:49,527 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:49,527 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:49,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 19:49:49,528 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:49,528 INFO L82 PathProgramCache]: Analyzing trace with hash -896204878, now seen corresponding path program 1 times [2021-08-12 19:49:49,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:49,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644692710] [2021-08-12 19:49:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:49:49,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:49,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644692710] [2021-08-12 19:49:49,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644692710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:49,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548687390] [2021-08-12 19:49:49,556 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 [2021-08-12 19:49:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:49,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:49:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:49:49,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548687390] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:49,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 19:49:49,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-08-12 19:49:49,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292867828] [2021-08-12 19:49:49,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:49:49,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:49:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:49:49,690 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-08-12 19:49:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:49,789 INFO L93 Difference]: Finished difference Result 1575 states and 5774 transitions. [2021-08-12 19:49:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:49:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:49:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:49,803 INFO L225 Difference]: With dead ends: 1575 [2021-08-12 19:49:49,803 INFO L226 Difference]: Without dead ends: 1344 [2021-08-12 19:49:49,805 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:49:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-08-12 19:49:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-08-12 19:49:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-08-12 19:49:49,858 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-08-12 19:49:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:49,860 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-08-12 19:49:49,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-08-12 19:49:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-08-12 19:49:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:49:49,864 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:49,864 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:50,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:49:50,089 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash 591603758, now seen corresponding path program 1 times [2021-08-12 19:49:50,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:50,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098631371] [2021-08-12 19:49:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:50,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:50,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098631371] [2021-08-12 19:49:50,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098631371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:50,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896574754] [2021-08-12 19:49:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 19:49:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:49:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:50,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896574754] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:49:50,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 19:49:50,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-08-12 19:49:50,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626522442] [2021-08-12 19:49:50,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:49:50,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:49:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:49:50,198 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-08-12 19:49:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:50,334 INFO L93 Difference]: Finished difference Result 1984 states and 7173 transitions. [2021-08-12 19:49:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:49:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:49:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:50,362 INFO L225 Difference]: With dead ends: 1984 [2021-08-12 19:49:50,362 INFO L226 Difference]: Without dead ends: 1608 [2021-08-12 19:49:50,363 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:49:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-08-12 19:49:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-08-12 19:49:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-08-12 19:49:50,414 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-08-12 19:49:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:50,415 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-08-12 19:49:50,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-08-12 19:49:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-08-12 19:49:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:49:50,418 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:50,418 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:50,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:49:50,633 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:50,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1107902640, now seen corresponding path program 1 times [2021-08-12 19:49:50,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:50,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616040883] [2021-08-12 19:49:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:50,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:50,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616040883] [2021-08-12 19:49:50,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616040883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029149509] [2021-08-12 19:49:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 19:49:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:50,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:49:50,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:50,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-12 19:49:50,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:50,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:50,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:50,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:49:50,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:49:50,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:50,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:50,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:50,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-08-12 19:49:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:51,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029149509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:51,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:51,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:49:51,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495642938] [2021-08-12 19:49:51,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:49:51,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:51,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:49:51,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:49:51,048 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:51,439 INFO L93 Difference]: Finished difference Result 2486 states and 9308 transitions. [2021-08-12 19:49:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:49:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:49:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:51,451 INFO L225 Difference]: With dead ends: 2486 [2021-08-12 19:49:51,451 INFO L226 Difference]: Without dead ends: 2405 [2021-08-12 19:49:51,452 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:49:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-08-12 19:49:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1615. [2021-08-12 19:49:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.7360594795539033) internal successors, (6030), 1614 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 6030 transitions. [2021-08-12 19:49:51,546 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 6030 transitions. Word has length 29 [2021-08-12 19:49:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:51,546 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 6030 transitions. [2021-08-12 19:49:51,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 6030 transitions. [2021-08-12 19:49:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:49:51,553 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:51,554 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:51,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:49:51,769 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:51,769 INFO L82 PathProgramCache]: Analyzing trace with hash -769853710, now seen corresponding path program 2 times [2021-08-12 19:49:51,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:51,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336263636] [2021-08-12 19:49:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:52,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:52,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336263636] [2021-08-12 19:49:52,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336263636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:52,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203313406] [2021-08-12 19:49:52,004 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 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 [2021-08-12 19:49:52,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:49:52,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:49:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:52,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-12 19:49:52,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:52,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:52,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:52,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:49:52,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:49:52,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:52,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:52,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:52,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-08-12 19:49:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:52,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203313406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:52,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:52,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:49:52,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207737053] [2021-08-12 19:49:52,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:49:52,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:49:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:49:52,216 INFO L87 Difference]: Start difference. First operand 1615 states and 6030 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:52,584 INFO L93 Difference]: Finished difference Result 2583 states and 9698 transitions. [2021-08-12 19:49:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:49:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:49:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:52,598 INFO L225 Difference]: With dead ends: 2583 [2021-08-12 19:49:52,599 INFO L226 Difference]: Without dead ends: 2502 [2021-08-12 19:49:52,600 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:49:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-08-12 19:49:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1741. [2021-08-12 19:49:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.7379310344827585) internal successors, (6504), 1740 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 6504 transitions. [2021-08-12 19:49:52,692 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 6504 transitions. Word has length 29 [2021-08-12 19:49:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:52,693 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 6504 transitions. [2021-08-12 19:49:52,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 6504 transitions. [2021-08-12 19:49:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:49:52,699 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:52,699 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:52,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 19:49:52,923 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:52,923 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 3 times [2021-08-12 19:49:52,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:52,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298379772] [2021-08-12 19:49:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:53,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:53,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298379772] [2021-08-12 19:49:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298379772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:53,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526457046] [2021-08-12 19:49:53,079 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 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 [2021-08-12 19:49:53,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:49:53,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:53,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:49:53,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:53,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-12 19:49:53,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:53,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:53,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:53,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-08-12 19:49:53,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:49:53,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:53,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:53,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:53,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-08-12 19:49:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:53,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526457046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:53,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:53,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:49:53,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942765702] [2021-08-12 19:49:53,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:49:53,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:53,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:49:53,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:49:53,284 INFO L87 Difference]: Start difference. First operand 1741 states and 6504 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:53,764 INFO L93 Difference]: Finished difference Result 3045 states and 11436 transitions. [2021-08-12 19:49:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:49:53,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:49:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:53,784 INFO L225 Difference]: With dead ends: 3045 [2021-08-12 19:49:53,784 INFO L226 Difference]: Without dead ends: 2964 [2021-08-12 19:49:53,785 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:49:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-08-12 19:49:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1837. [2021-08-12 19:49:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-08-12 19:49:53,920 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-08-12 19:49:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:53,921 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-08-12 19:49:53,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-08-12 19:49:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:49:53,928 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:53,928 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:54,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:49:54,152 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash -949623576, now seen corresponding path program 4 times [2021-08-12 19:49:54,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:54,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832151081] [2021-08-12 19:49:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:54,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:54,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832151081] [2021-08-12 19:49:54,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832151081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:54,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742846114] [2021-08-12 19:49:54,297 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 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 [2021-08-12 19:49:54,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:49:54,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:54,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:49:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:54,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-12 19:49:54,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:54,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:54,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:54,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:49:54,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:49:54,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:54,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:54,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:54,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-08-12 19:49:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:54,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742846114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:54,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:54,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:49:54,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066590868] [2021-08-12 19:49:54,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:49:54,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:54,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:49:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:49:54,474 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:54,939 INFO L93 Difference]: Finished difference Result 3107 states and 11703 transitions. [2021-08-12 19:49:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:49:54,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:49:54,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:54,958 INFO L225 Difference]: With dead ends: 3107 [2021-08-12 19:49:54,958 INFO L226 Difference]: Without dead ends: 3026 [2021-08-12 19:49:54,960 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:49:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-08-12 19:49:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2051. [2021-08-12 19:49:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-08-12 19:49:55,073 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-08-12 19:49:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:55,074 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-08-12 19:49:55,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-08-12 19:49:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:49:55,080 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:55,080 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:55,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:49:55,285 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1467587370, now seen corresponding path program 5 times [2021-08-12 19:49:55,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:55,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459644287] [2021-08-12 19:49:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:55,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:55,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459644287] [2021-08-12 19:49:55,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459644287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:55,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630125883] [2021-08-12 19:49:55,407 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 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 [2021-08-12 19:49:55,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:49:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:55,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:49:55,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:55,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-12 19:49:55,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:55,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:55,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:55,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:49:55,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:49:55,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:55,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:55,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:55,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-08-12 19:49:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:55,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630125883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:55,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:55,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:49:55,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763626588] [2021-08-12 19:49:55,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:49:55,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:49:55,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:49:55,593 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:56,001 INFO L93 Difference]: Finished difference Result 2935 states and 11025 transitions. [2021-08-12 19:49:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:49:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:49:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:56,015 INFO L225 Difference]: With dead ends: 2935 [2021-08-12 19:49:56,015 INFO L226 Difference]: Without dead ends: 2854 [2021-08-12 19:49:56,017 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:49:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-08-12 19:49:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-08-12 19:49:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-08-12 19:49:56,121 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-08-12 19:49:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:56,122 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-08-12 19:49:56,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-08-12 19:49:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:49:56,127 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:56,127 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:56,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:49:56,337 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash -55564736, now seen corresponding path program 6 times [2021-08-12 19:49:56,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:56,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447741643] [2021-08-12 19:49:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:56,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:56,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447741643] [2021-08-12 19:49:56,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447741643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:56,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675239529] [2021-08-12 19:49:56,466 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 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 [2021-08-12 19:49:56,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:49:56,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:49:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:56,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:49:56,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:56,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:56,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:56,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-08-12 19:49:56,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:49:56,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:56,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:56,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:56,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-08-12 19:49:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:56,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675239529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:56,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:56,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-12 19:49:56,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940441790] [2021-08-12 19:49:56,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:49:56,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:56,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:49:56,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:49:56,659 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:57,022 INFO L93 Difference]: Finished difference Result 2809 states and 10503 transitions. [2021-08-12 19:49:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:49:57,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:49:57,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:57,036 INFO L225 Difference]: With dead ends: 2809 [2021-08-12 19:49:57,036 INFO L226 Difference]: Without dead ends: 2728 [2021-08-12 19:49:57,037 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:49:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-08-12 19:49:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-08-12 19:49:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-08-12 19:49:57,152 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-08-12 19:49:57,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:57,152 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-08-12 19:49:57,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-08-12 19:49:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:49:57,157 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:57,157 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:57,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:49:57,377 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash -945078094, now seen corresponding path program 7 times [2021-08-12 19:49:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:57,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397321778] [2021-08-12 19:49:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:57,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:57,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397321778] [2021-08-12 19:49:57,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397321778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:57,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545138274] [2021-08-12 19:49:57,408 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 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 [2021-08-12 19:49:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:49:57,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:49:57,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545138274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:57,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:57,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-12 19:49:57,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023523834] [2021-08-12 19:49:57,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:49:57,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:57,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:49:57,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:49:57,488 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:57,839 INFO L93 Difference]: Finished difference Result 4534 states and 17048 transitions. [2021-08-12 19:49:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:49:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:49:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:57,854 INFO L225 Difference]: With dead ends: 4534 [2021-08-12 19:49:57,854 INFO L226 Difference]: Without dead ends: 3242 [2021-08-12 19:49:57,857 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:49:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-08-12 19:49:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-08-12 19:49:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-08-12 19:49:58,020 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-08-12 19:49:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:58,020 INFO L482 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-08-12 19:49:58,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-08-12 19:49:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:49:58,027 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:58,027 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:58,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 19:49:58,241 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1385088466, now seen corresponding path program 8 times [2021-08-12 19:49:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:58,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467183053] [2021-08-12 19:49:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:49:58,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467183053] [2021-08-12 19:49:58,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467183053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:58,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065034680] [2021-08-12 19:49:58,305 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 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 [2021-08-12 19:49:58,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:49:58,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:49:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:49:58,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065034680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:58,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:58,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-12 19:49:58,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625845979] [2021-08-12 19:49:58,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:49:58,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:58,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:49:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:49:58,394 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-08-12 19:49:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:58,853 INFO L93 Difference]: Finished difference Result 6245 states and 23591 transitions. [2021-08-12 19:49:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:49:58,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:49:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:58,875 INFO L225 Difference]: With dead ends: 6245 [2021-08-12 19:49:58,875 INFO L226 Difference]: Without dead ends: 5006 [2021-08-12 19:49:58,880 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:49:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-08-12 19:49:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-08-12 19:49:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-08-12 19:49:59,155 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-08-12 19:49:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:59,155 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-08-12 19:49:59,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-08-12 19:49:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-08-12 19:49:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:49:59,166 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:59,166 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:59,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:49:59,381 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:59,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1789712274, now seen corresponding path program 9 times [2021-08-12 19:49:59,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:59,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533491025] [2021-08-12 19:49:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:49:59,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533491025] [2021-08-12 19:49:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533491025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607898100] [2021-08-12 19:49:59,412 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 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 [2021-08-12 19:49:59,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:49:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:59,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:49:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:49:59,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607898100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:59,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:59,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 19:49:59,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995069847] [2021-08-12 19:49:59,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:49:59,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:49:59,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:49:59,550 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:01,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:01,327 INFO L93 Difference]: Finished difference Result 17791 states and 68042 transitions. [2021-08-12 19:50:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:50:01,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:01,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:01,399 INFO L225 Difference]: With dead ends: 17791 [2021-08-12 19:50:01,400 INFO L226 Difference]: Without dead ends: 13965 [2021-08-12 19:50:01,412 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:50:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-08-12 19:50:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-08-12 19:50:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-08-12 19:50:01,985 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-08-12 19:50:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:01,985 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-08-12 19:50:01,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-08-12 19:50:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:50:02,004 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:02,004 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:02,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 19:50:02,217 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:02,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:02,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1811384725, now seen corresponding path program 10 times [2021-08-12 19:50:02,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:02,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072892799] [2021-08-12 19:50:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:50:02,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:02,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072892799] [2021-08-12 19:50:02,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072892799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:02,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053649168] [2021-08-12 19:50:02,258 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 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 [2021-08-12 19:50:02,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:50:02,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:02,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:50:02,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:50:02,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053649168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:02,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:02,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 19:50:02,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236097217] [2021-08-12 19:50:02,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:50:02,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:50:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:50:02,396 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:04,959 INFO L93 Difference]: Finished difference Result 20638 states and 77679 transitions. [2021-08-12 19:50:04,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:50:04,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:05,029 INFO L225 Difference]: With dead ends: 20638 [2021-08-12 19:50:05,029 INFO L226 Difference]: Without dead ends: 18531 [2021-08-12 19:50:05,040 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:50:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-08-12 19:50:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-08-12 19:50:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-08-12 19:50:05,879 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-08-12 19:50:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:05,879 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-08-12 19:50:05,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-08-12 19:50:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:50:05,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:05,903 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:06,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:06,103 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:06,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1977044948, now seen corresponding path program 11 times [2021-08-12 19:50:06,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:06,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775459384] [2021-08-12 19:50:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:50:06,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:06,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775459384] [2021-08-12 19:50:06,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775459384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:06,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276130103] [2021-08-12 19:50:06,130 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 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 [2021-08-12 19:50:06,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:50:06,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:50:06,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:50:06,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276130103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:06,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:06,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-12 19:50:06,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453992245] [2021-08-12 19:50:06,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:50:06,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:50:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:50:06,265 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:09,052 INFO L93 Difference]: Finished difference Result 18697 states and 71299 transitions. [2021-08-12 19:50:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:50:09,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:09,120 INFO L225 Difference]: With dead ends: 18697 [2021-08-12 19:50:09,120 INFO L226 Difference]: Without dead ends: 18354 [2021-08-12 19:50:09,126 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:50:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-08-12 19:50:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-08-12 19:50:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-08-12 19:50:10,001 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-08-12 19:50:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:10,001 INFO L482 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-08-12 19:50:10,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-08-12 19:50:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:50:10,026 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:10,026 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:10,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:10,227 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:10,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-08-12 19:50:10,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:10,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497714028] [2021-08-12 19:50:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:50:10,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497714028] [2021-08-12 19:50:10,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497714028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361452577] [2021-08-12 19:50:10,256 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 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 [2021-08-12 19:50:10,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:50:10,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:10,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:50:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:50:10,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361452577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:10,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:10,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-12 19:50:10,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522370374] [2021-08-12 19:50:10,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:50:10,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:50:10,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:50:10,372 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:12,906 INFO L93 Difference]: Finished difference Result 22890 states and 88070 transitions. [2021-08-12 19:50:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:50:12,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:12,977 INFO L225 Difference]: With dead ends: 22890 [2021-08-12 19:50:12,977 INFO L226 Difference]: Without dead ends: 18706 [2021-08-12 19:50:12,993 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:50:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-08-12 19:50:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-08-12 19:50:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-08-12 19:50:14,146 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-08-12 19:50:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:14,146 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-08-12 19:50:14,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-08-12 19:50:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:50:14,177 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:14,177 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:14,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 19:50:14,381 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:14,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1475484620, now seen corresponding path program 13 times [2021-08-12 19:50:14,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:14,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199993724] [2021-08-12 19:50:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:50:14,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199993724] [2021-08-12 19:50:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199993724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481018669] [2021-08-12 19:50:14,424 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 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 [2021-08-12 19:50:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:50:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:50:14,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481018669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:14,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:14,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-12 19:50:14,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71952883] [2021-08-12 19:50:14,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:50:14,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:14,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:50:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:50:14,552 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:18,714 INFO L93 Difference]: Finished difference Result 30758 states and 120280 transitions. [2021-08-12 19:50:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:50:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:18,839 INFO L225 Difference]: With dead ends: 30758 [2021-08-12 19:50:18,840 INFO L226 Difference]: Without dead ends: 27668 [2021-08-12 19:50:18,853 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:50:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-08-12 19:50:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-08-12 19:50:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-08-12 19:50:20,131 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-08-12 19:50:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:20,132 INFO L482 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-08-12 19:50:20,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-08-12 19:50:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:50:20,176 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:20,177 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:20,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:20,377 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:20,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1888062838, now seen corresponding path program 14 times [2021-08-12 19:50:20,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:20,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004923888] [2021-08-12 19:50:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:50:20,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:20,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004923888] [2021-08-12 19:50:20,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004923888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:20,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175171795] [2021-08-12 19:50:20,410 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 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 [2021-08-12 19:50:20,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:50:20,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:50:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:50:20,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175171795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:20,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:20,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-12 19:50:20,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298167931] [2021-08-12 19:50:20,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:50:20,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:50:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:50:20,519 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:24,644 INFO L93 Difference]: Finished difference Result 27377 states and 106950 transitions. [2021-08-12 19:50:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:50:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:24,772 INFO L225 Difference]: With dead ends: 27377 [2021-08-12 19:50:24,772 INFO L226 Difference]: Without dead ends: 26976 [2021-08-12 19:50:24,783 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:50:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-08-12 19:50:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-08-12 19:50:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-08-12 19:50:26,056 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-08-12 19:50:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:26,057 INFO L482 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-08-12 19:50:26,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-08-12 19:50:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:50:26,097 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:26,097 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:26,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:50:26,313 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2054889942, now seen corresponding path program 15 times [2021-08-12 19:50:26,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:26,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217579515] [2021-08-12 19:50:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:50:26,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:26,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217579515] [2021-08-12 19:50:26,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217579515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:26,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113336594] [2021-08-12 19:50:26,348 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 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 [2021-08-12 19:50:26,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:50:26,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:50:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:50:26,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113336594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:26,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:26,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 19:50:26,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449374366] [2021-08-12 19:50:26,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:50:26,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:50:26,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:50:26,442 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:31,028 INFO L93 Difference]: Finished difference Result 30493 states and 120285 transitions. [2021-08-12 19:50:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:50:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:31,153 INFO L225 Difference]: With dead ends: 30493 [2021-08-12 19:50:31,153 INFO L226 Difference]: Without dead ends: 30070 [2021-08-12 19:50:31,164 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:50:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-08-12 19:50:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-08-12 19:50:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-08-12 19:50:32,591 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-08-12 19:50:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:32,591 INFO L482 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-08-12 19:50:32,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-08-12 19:50:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:50:32,647 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:32,647 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:32,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 19:50:32,848 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2024685389, now seen corresponding path program 16 times [2021-08-12 19:50:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:32,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906532398] [2021-08-12 19:50:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:50:32,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:32,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906532398] [2021-08-12 19:50:32,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906532398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:32,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002623541] [2021-08-12 19:50:32,878 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 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 [2021-08-12 19:50:32,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:50:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:50:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-12 19:50:32,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002623541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:32,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:32,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-12 19:50:32,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913894074] [2021-08-12 19:50:32,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:50:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:32,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:50:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:50:32,989 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:37,102 INFO L93 Difference]: Finished difference Result 29786 states and 117525 transitions. [2021-08-12 19:50:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:50:37,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:50:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:37,217 INFO L225 Difference]: With dead ends: 29786 [2021-08-12 19:50:37,217 INFO L226 Difference]: Without dead ends: 28230 [2021-08-12 19:50:37,229 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:50:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-08-12 19:50:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-08-12 19:50:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-08-12 19:50:38,680 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-08-12 19:50:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:38,681 INFO L482 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-08-12 19:50:38,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-08-12 19:50:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:50:38,725 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:38,725 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:38,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 19:50:38,925 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash 31444491, now seen corresponding path program 17 times [2021-08-12 19:50:38,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:38,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181060131] [2021-08-12 19:50:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-12 19:50:38,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181060131] [2021-08-12 19:50:38,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181060131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791410991] [2021-08-12 19:50:38,951 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 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 [2021-08-12 19:50:39,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:50:39,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:50:39,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-12 19:50:39,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791410991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:39,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:39,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 19:50:39,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183301579] [2021-08-12 19:50:39,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:50:39,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:39,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:50:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:50:39,050 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:43,582 INFO L93 Difference]: Finished difference Result 30705 states and 126625 transitions. [2021-08-12 19:50:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:50:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-12 19:50:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:43,707 INFO L225 Difference]: With dead ends: 30705 [2021-08-12 19:50:43,707 INFO L226 Difference]: Without dead ends: 29898 [2021-08-12 19:50:43,718 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:50:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-08-12 19:50:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-08-12 19:50:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-08-12 19:50:45,505 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-08-12 19:50:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:45,506 INFO L482 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-08-12 19:50:45,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-08-12 19:50:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:50:45,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:45,562 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:45,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 19:50:45,762 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash -906169461, now seen corresponding path program 18 times [2021-08-12 19:50:45,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:45,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113804311] [2021-08-12 19:50:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-12 19:50:45,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:45,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113804311] [2021-08-12 19:50:45,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113804311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:45,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776016627] [2021-08-12 19:50:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:50:45,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:50:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:50:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-12 19:50:45,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776016627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:45,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:45,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 19:50:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974644705] [2021-08-12 19:50:45,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:50:45,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:45,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:50:45,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:50:45,886 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:51,821 INFO L93 Difference]: Finished difference Result 38411 states and 159246 transitions. [2021-08-12 19:50:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:50:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-12 19:50:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:52,086 INFO L225 Difference]: With dead ends: 38411 [2021-08-12 19:50:52,087 INFO L226 Difference]: Without dead ends: 37062 [2021-08-12 19:50:52,098 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:50:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-08-12 19:50:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-08-12 19:50:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-08-12 19:50:54,670 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-08-12 19:50:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:54,671 INFO L482 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-08-12 19:50:54,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-08-12 19:50:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:50:54,744 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:54,744 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:54,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:50:54,948 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash -774251319, now seen corresponding path program 19 times [2021-08-12 19:50:54,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:54,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326974667] [2021-08-12 19:50:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:55,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:55,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326974667] [2021-08-12 19:50:55,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326974667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:55,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122582856] [2021-08-12 19:50:55,313 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 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 [2021-08-12 19:50:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:55,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:50:55,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:55,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:50:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 19:50:55,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:55,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:55,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:50:55,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-08-12 19:50:55,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-12 19:50:55,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:55,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:55,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:50:55,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-08-12 19:50:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:55,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122582856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:55,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:55,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-08-12 19:50:55,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391654746] [2021-08-12 19:50:55,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:50:55,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:55,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:50:55,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:50:55,652 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:08,551 INFO L93 Difference]: Finished difference Result 68332 states and 281301 transitions. [2021-08-12 19:51:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:51:08,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:51:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:09,006 INFO L225 Difference]: With dead ends: 68332 [2021-08-12 19:51:09,006 INFO L226 Difference]: Without dead ends: 68275 [2021-08-12 19:51:09,026 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 796.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:51:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68275 states. [2021-08-12 19:51:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68275 to 35332. [2021-08-12 19:51:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35332 states, 35331 states have (on average 4.143075486117008) internal successors, (146379), 35331 states have internal predecessors, (146379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35332 states to 35332 states and 146379 transitions. [2021-08-12 19:51:12,687 INFO L78 Accepts]: Start accepts. Automaton has 35332 states and 146379 transitions. Word has length 39 [2021-08-12 19:51:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:12,687 INFO L482 AbstractCegarLoop]: Abstraction has 35332 states and 146379 transitions. [2021-08-12 19:51:12,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 35332 states and 146379 transitions. [2021-08-12 19:51:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:51:12,774 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:12,775 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:12,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:12,975 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1160268155, now seen corresponding path program 20 times [2021-08-12 19:51:12,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:12,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260446844] [2021-08-12 19:51:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:13,447 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-08-12 19:51:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:13,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260446844] [2021-08-12 19:51:13,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260446844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302776752] [2021-08-12 19:51:13,449 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 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 [2021-08-12 19:51:13,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:51:13,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:51:13,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:13,648 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:51:13,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 19:51:13,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:13,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:13,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:13,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-08-12 19:51:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-12 19:51:13,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:13,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:13,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:13,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-08-12 19:51:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:13,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302776752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:13,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:13,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-12 19:51:13,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556010674] [2021-08-12 19:51:13,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:51:13,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:13,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:51:13,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:51:13,794 INFO L87 Difference]: Start difference. First operand 35332 states and 146379 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:26,748 INFO L93 Difference]: Finished difference Result 63148 states and 258448 transitions. [2021-08-12 19:51:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:51:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:51:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:27,019 INFO L225 Difference]: With dead ends: 63148 [2021-08-12 19:51:27,020 INFO L226 Difference]: Without dead ends: 62930 [2021-08-12 19:51:27,039 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1230.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:51:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62930 states. [2021-08-12 19:51:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62930 to 35439. [2021-08-12 19:51:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35439 states, 35438 states have (on average 4.145691066087251) internal successors, (146915), 35438 states have internal predecessors, (146915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35439 states to 35439 states and 146915 transitions. [2021-08-12 19:51:30,524 INFO L78 Accepts]: Start accepts. Automaton has 35439 states and 146915 transitions. Word has length 39 [2021-08-12 19:51:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:30,524 INFO L482 AbstractCegarLoop]: Abstraction has 35439 states and 146915 transitions. [2021-08-12 19:51:30,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 35439 states and 146915 transitions. [2021-08-12 19:51:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:51:30,594 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:30,594 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:30,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:51:30,794 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 21 times [2021-08-12 19:51:30,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:30,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933687739] [2021-08-12 19:51:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:31,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:31,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933687739] [2021-08-12 19:51:31,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933687739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:31,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638248026] [2021-08-12 19:51:31,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:31,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:51:31,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:31,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:51:31,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:31,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:31,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-08-12 19:51:31,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:31,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:31,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:31,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-08-12 19:51:31,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-12 19:51:31,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:31,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:31,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:31,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-08-12 19:51:31,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:31,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-08-12 19:51:31,614 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:51:31,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:31,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:51:31,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-08-12 19:51:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:31,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638248026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:31,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:31,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-12 19:51:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414958103] [2021-08-12 19:51:31,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:51:31,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:51:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:51:31,863 INFO L87 Difference]: Start difference. First operand 35439 states and 146915 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:32,810 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-08-12 19:51:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:46,081 INFO L93 Difference]: Finished difference Result 64601 states and 264129 transitions. [2021-08-12 19:51:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 19:51:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:51:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:46,351 INFO L225 Difference]: With dead ends: 64601 [2021-08-12 19:51:46,351 INFO L226 Difference]: Without dead ends: 64378 [2021-08-12 19:51:46,371 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1741.1ms TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:51:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64378 states. [2021-08-12 19:51:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64378 to 35778. [2021-08-12 19:51:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35778 states, 35777 states have (on average 4.14014590379294) internal successors, (148122), 35777 states have internal predecessors, (148122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35778 states to 35778 states and 148122 transitions. [2021-08-12 19:51:49,941 INFO L78 Accepts]: Start accepts. Automaton has 35778 states and 148122 transitions. Word has length 39 [2021-08-12 19:51:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:49,941 INFO L482 AbstractCegarLoop]: Abstraction has 35778 states and 148122 transitions. [2021-08-12 19:51:49,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 35778 states and 148122 transitions. [2021-08-12 19:51:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:51:50,019 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:50,019 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:50,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:50,220 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:50,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1572423621, now seen corresponding path program 22 times [2021-08-12 19:51:50,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:50,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903366091] [2021-08-12 19:51:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:50,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903366091] [2021-08-12 19:51:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903366091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458946834] [2021-08-12 19:51:50,584 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 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 [2021-08-12 19:51:50,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:51:50,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:50,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:51:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:50,781 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:51:50,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 19:51:50,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:50,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-08-12 19:51:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-12 19:51:50,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:50,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-08-12 19:51:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:50,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458946834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:50,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:50,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-12 19:51:50,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4180001] [2021-08-12 19:51:50,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:51:50,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:50,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:51:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:51:50,981 INFO L87 Difference]: Start difference. First operand 35778 states and 148122 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:07,776 INFO L93 Difference]: Finished difference Result 77059 states and 313107 transitions. [2021-08-12 19:52:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:52:07,777 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:52:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:08,292 INFO L225 Difference]: With dead ends: 77059 [2021-08-12 19:52:08,292 INFO L226 Difference]: Without dead ends: 76873 [2021-08-12 19:52:08,315 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1165.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:52:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76873 states. [2021-08-12 19:52:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76873 to 35467. [2021-08-12 19:52:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35467 states, 35466 states have (on average 4.145068516325495) internal successors, (147009), 35466 states have internal predecessors, (147009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35467 states to 35467 states and 147009 transitions. [2021-08-12 19:52:12,279 INFO L78 Accepts]: Start accepts. Automaton has 35467 states and 147009 transitions. Word has length 39 [2021-08-12 19:52:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:12,279 INFO L482 AbstractCegarLoop]: Abstraction has 35467 states and 147009 transitions. [2021-08-12 19:52:12,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 35467 states and 147009 transitions. [2021-08-12 19:52:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:52:12,353 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:12,353 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:12,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 19:52:12,557 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1303937869, now seen corresponding path program 23 times [2021-08-12 19:52:12,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:12,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300685842] [2021-08-12 19:52:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:13,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:13,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300685842] [2021-08-12 19:52:13,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300685842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:13,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26897469] [2021-08-12 19:52:13,029 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 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 [2021-08-12 19:52:13,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:52:13,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:13,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-12 19:52:13,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:13,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:13,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:13,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-08-12 19:52:13,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:52:13,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:13,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:52:13,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:47 [2021-08-12 19:52:13,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:13,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:13,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:13,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:13,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2021-08-12 19:52:13,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:52:13,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:13,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:13,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2021-08-12 19:52:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:13,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26897469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:13,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:13,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-12 19:52:13,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007183461] [2021-08-12 19:52:13,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:52:13,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:13,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:52:13,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:52:13,736 INFO L87 Difference]: Start difference. First operand 35467 states and 147009 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:29,884 INFO L93 Difference]: Finished difference Result 62906 states and 256530 transitions. [2021-08-12 19:52:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:52:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:52:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:30,148 INFO L225 Difference]: With dead ends: 62906 [2021-08-12 19:52:30,148 INFO L226 Difference]: Without dead ends: 62810 [2021-08-12 19:52:30,169 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2079.3ms TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 19:52:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62810 states. [2021-08-12 19:52:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62810 to 36170. [2021-08-12 19:52:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36170 states, 36169 states have (on average 4.143631286460781) internal successors, (149871), 36169 states have internal predecessors, (149871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36170 states to 36170 states and 149871 transitions. [2021-08-12 19:52:33,979 INFO L78 Accepts]: Start accepts. Automaton has 36170 states and 149871 transitions. Word has length 39 [2021-08-12 19:52:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:33,980 INFO L482 AbstractCegarLoop]: Abstraction has 36170 states and 149871 transitions. [2021-08-12 19:52:33,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 36170 states and 149871 transitions. [2021-08-12 19:52:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:52:34,055 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:34,055 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:34,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:52:34,257 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash 495020509, now seen corresponding path program 24 times [2021-08-12 19:52:34,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:34,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105592984] [2021-08-12 19:52:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:34,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:34,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105592984] [2021-08-12 19:52:34,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105592984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:34,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256169206] [2021-08-12 19:52:34,797 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 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 [2021-08-12 19:52:34,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:52:34,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:34,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:52:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:35,022 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:52:35,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 19:52:35,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:35,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:35,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:35,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-08-12 19:52:35,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-12 19:52:35,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:35,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:35,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:35,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-08-12 19:52:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:35,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256169206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:35,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:35,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-12 19:52:35,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763744915] [2021-08-12 19:52:35,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:52:35,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:52:35,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:52:35,153 INFO L87 Difference]: Start difference. First operand 36170 states and 149871 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:51,706 INFO L93 Difference]: Finished difference Result 69302 states and 285188 transitions. [2021-08-12 19:52:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:52:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:52:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:52,210 INFO L225 Difference]: With dead ends: 69302 [2021-08-12 19:52:52,210 INFO L226 Difference]: Without dead ends: 69245 [2021-08-12 19:52:52,232 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1120.5ms TimeCoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:52:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69245 states. [2021-08-12 19:52:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69245 to 35741. [2021-08-12 19:52:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35741 states, 35740 states have (on average 4.143956351426972) internal successors, (148105), 35740 states have internal predecessors, (148105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35741 states to 35741 states and 148105 transitions. [2021-08-12 19:52:57,211 INFO L78 Accepts]: Start accepts. Automaton has 35741 states and 148105 transitions. Word has length 39 [2021-08-12 19:52:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:57,212 INFO L482 AbstractCegarLoop]: Abstraction has 35741 states and 148105 transitions. [2021-08-12 19:52:57,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 35741 states and 148105 transitions. [2021-08-12 19:52:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:52:57,286 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:57,286 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:57,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-12 19:52:57,488 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 630581605, now seen corresponding path program 25 times [2021-08-12 19:52:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:57,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47085837] [2021-08-12 19:52:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:57,754 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-08-12 19:52:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:58,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:58,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47085837] [2021-08-12 19:52:58,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47085837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:58,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505307193] [2021-08-12 19:52:58,025 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 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 [2021-08-12 19:52:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:58,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:52:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:58,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:52:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 19:52:58,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:58,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:58,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:58,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-08-12 19:52:58,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-12 19:52:58,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:58,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:58,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:58,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-08-12 19:52:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:58,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505307193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:58,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:58,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-12 19:52:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517622948] [2021-08-12 19:52:58,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:52:58,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:52:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:52:58,367 INFO L87 Difference]: Start difference. First operand 35741 states and 148105 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:59,005 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-08-12 19:53:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:53:14,500 INFO L93 Difference]: Finished difference Result 63433 states and 259713 transitions. [2021-08-12 19:53:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 19:53:14,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:53:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:53:14,758 INFO L225 Difference]: With dead ends: 63433 [2021-08-12 19:53:14,758 INFO L226 Difference]: Without dead ends: 63215 [2021-08-12 19:53:14,931 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1356.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:53:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63215 states. [2021-08-12 19:53:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63215 to 35591. [2021-08-12 19:53:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35591 states, 35590 states have (on average 4.1449002528800225) internal successors, (147517), 35590 states have internal predecessors, (147517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:53:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35591 states to 35591 states and 147517 transitions. [2021-08-12 19:53:18,655 INFO L78 Accepts]: Start accepts. Automaton has 35591 states and 147517 transitions. Word has length 39 [2021-08-12 19:53:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:53:18,655 INFO L482 AbstractCegarLoop]: Abstraction has 35591 states and 147517 transitions. [2021-08-12 19:53:18,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:53:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 35591 states and 147517 transitions. [2021-08-12 19:53:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:53:18,729 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:53:18,730 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:53:18,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:53:18,933 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:53:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:53:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1833798575, now seen corresponding path program 26 times [2021-08-12 19:53:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:53:18,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849546094] [2021-08-12 19:53:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:53:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:53:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:53:19,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:53:19,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849546094] [2021-08-12 19:53:19,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849546094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:53:19,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7492598] [2021-08-12 19:53:19,215 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 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 [2021-08-12 19:53:19,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:53:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:53:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-12 19:53:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:53:19,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-12 19:53:19,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:19,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:19,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:53:19,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-08-12 19:53:19,650 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:53:19,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-08-12 19:53:19,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:19,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:19,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:53:19,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-08-12 19:53:19,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:19,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-08-12 19:53:19,726 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:53:19,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:19,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:53:19,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-08-12 19:53:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:53:19,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7492598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:53:19,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:53:19,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-12 19:53:19,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111228948] [2021-08-12 19:53:19,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:53:19,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:53:19,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:53:19,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:53:19,772 INFO L87 Difference]: Start difference. First operand 35591 states and 147517 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:53:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:53:41,578 INFO L93 Difference]: Finished difference Result 81057 states and 333974 transitions. [2021-08-12 19:53:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:53:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:53:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:53:41,963 INFO L225 Difference]: With dead ends: 81057 [2021-08-12 19:53:41,963 INFO L226 Difference]: Without dead ends: 81000 [2021-08-12 19:53:41,987 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1119.6ms TimeCoverageRelationStatistics Valid=402, Invalid=2148, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:53:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81000 states. [2021-08-12 19:53:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81000 to 36137. [2021-08-12 19:53:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36137 states, 36136 states have (on average 4.146695815806951) internal successors, (149845), 36136 states have internal predecessors, (149845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:53:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36137 states to 36137 states and 149845 transitions. [2021-08-12 19:53:46,427 INFO L78 Accepts]: Start accepts. Automaton has 36137 states and 149845 transitions. Word has length 39 [2021-08-12 19:53:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:53:46,427 INFO L482 AbstractCegarLoop]: Abstraction has 36137 states and 149845 transitions. [2021-08-12 19:53:46,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:53:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 36137 states and 149845 transitions. [2021-08-12 19:53:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:53:46,518 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:53:46,519 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:53:46,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 19:53:46,719 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:53:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:53:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1196210545, now seen corresponding path program 27 times [2021-08-12 19:53:46,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:53:46,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553582875] [2021-08-12 19:53:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:53:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:53:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:53:47,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:53:47,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553582875] [2021-08-12 19:53:47,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553582875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:53:47,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221452035] [2021-08-12 19:53:47,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:53:47,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:53:47,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:53:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-12 19:53:47,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:53:47,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:47,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-08-12 19:53:47,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:47,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:47,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:53:47,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:71 [2021-08-12 19:53:47,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:47,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:53:47,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:53:47,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-08-12 19:53:47,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:47,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-08-12 19:53:47,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-08-12 19:53:47,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:47,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:47,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 19:53:47,511 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:150, output treesize:51 [2021-08-12 19:53:47,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:47,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-08-12 19:53:47,617 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:53:47,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:47,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:47,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-08-12 19:53:47,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:47,826 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-08-12 19:53:47,827 INFO L628 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2021-08-12 19:53:47,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:53:47,830 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:37 [2021-08-12 19:53:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:53:47,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221452035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:53:47,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:53:47,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-12 19:53:47,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114187707] [2021-08-12 19:53:47,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:53:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:53:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:53:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:53:47,890 INFO L87 Difference]: Start difference. First operand 36137 states and 149845 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:14,643 INFO L93 Difference]: Finished difference Result 95673 states and 392104 transitions. [2021-08-12 19:54:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-12 19:54:14,644 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:54:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:15,056 INFO L225 Difference]: With dead ends: 95673 [2021-08-12 19:54:15,056 INFO L226 Difference]: Without dead ends: 83521 [2021-08-12 19:54:15,094 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2226.6ms TimeCoverageRelationStatistics Valid=589, Invalid=4103, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 19:54:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83521 states. [2021-08-12 19:54:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83521 to 37060. [2021-08-12 19:54:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37060 states, 37059 states have (on average 4.140397744137727) internal successors, (153439), 37059 states have internal predecessors, (153439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37060 states to 37060 states and 153439 transitions. [2021-08-12 19:54:19,991 INFO L78 Accepts]: Start accepts. Automaton has 37060 states and 153439 transitions. Word has length 39 [2021-08-12 19:54:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:19,991 INFO L482 AbstractCegarLoop]: Abstraction has 37060 states and 153439 transitions. [2021-08-12 19:54:19,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 37060 states and 153439 transitions. [2021-08-12 19:54:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:54:20,071 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:20,071 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:20,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:54:20,272 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1679763727, now seen corresponding path program 28 times [2021-08-12 19:54:20,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:20,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012058940] [2021-08-12 19:54:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:20,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:20,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012058940] [2021-08-12 19:54:20,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012058940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:20,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479330428] [2021-08-12 19:54:20,574 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 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 [2021-08-12 19:54:20,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:54:20,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:20,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:54:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:54:20,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-12 19:54:20,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:20,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:20,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:54:20,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-08-12 19:54:20,857 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:54:20,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-12 19:54:20,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:54:20,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:54:20,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:54:20,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-08-12 19:54:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:20,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479330428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:20,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:54:20,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-08-12 19:54:20,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686349896] [2021-08-12 19:54:20,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:54:20,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:54:20,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:54:20,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:54:20,894 INFO L87 Difference]: Start difference. First operand 37060 states and 153439 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:54:46,188 INFO L93 Difference]: Finished difference Result 83734 states and 344960 transitions. [2021-08-12 19:54:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:54:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:54:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:54:46,591 INFO L225 Difference]: With dead ends: 83734 [2021-08-12 19:54:46,591 INFO L226 Difference]: Without dead ends: 83677 [2021-08-12 19:54:46,614 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 832.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:54:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83677 states. [2021-08-12 19:54:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83677 to 37730. [2021-08-12 19:54:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37730 states, 37729 states have (on average 4.145537915131596) internal successors, (156407), 37729 states have internal predecessors, (156407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37730 states to 37730 states and 156407 transitions. [2021-08-12 19:54:51,812 INFO L78 Accepts]: Start accepts. Automaton has 37730 states and 156407 transitions. Word has length 39 [2021-08-12 19:54:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:54:51,813 INFO L482 AbstractCegarLoop]: Abstraction has 37730 states and 156407 transitions. [2021-08-12 19:54:51,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:54:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 37730 states and 156407 transitions. [2021-08-12 19:54:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:54:51,897 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:54:51,897 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:54:52,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 19:54:52,101 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:54:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:54:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash -702447437, now seen corresponding path program 29 times [2021-08-12 19:54:52,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:54:52,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875091522] [2021-08-12 19:54:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:54:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:54:52,549 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-08-12 19:54:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:54:52,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:54:52,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875091522] [2021-08-12 19:54:52,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875091522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:54:52,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692267811] [2021-08-12 19:54:52,592 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 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 [2021-08-12 19:54:52,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:54:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:54:55,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-12 19:54:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates...