/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/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:51:14,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:51:14,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:51:14,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 18:51:14,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 18:51:14,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 18:51:14,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 18:51:14,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 18:51:14,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 18:51:14,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 18:51:14,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 18:51:14,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 18:51:14,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 18:51:14,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 18:51:14,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 18:51:14,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 18:51:14,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 18:51:14,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 18:51:14,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 18:51:14,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 18:51:14,881 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 18:51:14,895 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:51:14,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:51:14,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:51:14,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:51:14,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:51:14,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:51:14,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:51:14,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:51:14,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:51:14,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:51:14,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:51:14,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:51:14,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:51:14,899 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:51:14,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:51:14,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:51:15,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:51:15,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:51:15,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:51:15,187 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:51:15,190 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:51:15,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2021-08-12 18:51:15,190 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2021-08-12 18:51:15,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:51:15,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:51:15,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:51:15,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:51:15,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:51:15,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:51:15,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:51:15,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:51:15,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:51:15,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/1) ... [2021-08-12 18:51:15,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:51:15,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:51:15,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:51:15,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:51:15,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (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 18:51:15,322 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 18:51:15,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 18:51:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 18:51:15,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 18:51:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 18:51:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 18:51:15,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 18:51:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:51:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:51:15,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 18:51:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 18:51:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 18:51:15,326 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 18:51:15,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:51:15,456 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 18:51:15,457 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:51:15 BoogieIcfgContainer [2021-08-12 18:51:15,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:51:15,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:51:15,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:51:15,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:51:15,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:51:15" (1/2) ... [2021-08-12 18:51:15,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a48416 and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:51:15, skipping insertion in model container [2021-08-12 18:51:15,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:51:15" (2/2) ... [2021-08-12 18:51:15,462 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2021-08-12 18:51:15,466 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:51:15,466 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:51:15,466 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:51:15,491 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 18:51:15,505 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 18:51:15,519 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:51:15,519 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:51:15,519 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:51:15,519 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:51:15,519 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:51:15,519 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:51:15,519 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:51:15,519 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:51:15,525 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2021-08-12 18:51:15,605 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 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 18:51:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 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 18:51:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:51:15,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:15,620 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:15,621 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:15,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:15,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1022226388, now seen corresponding path program 1 times [2021-08-12 18:51:15,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:15,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369565272] [2021-08-12 18:51:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:15,899 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 18:51:15,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:15,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369565272] [2021-08-12 18:51:15,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369565272] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:15,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:15,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:15,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788151219] [2021-08-12 18:51:15,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:15,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:15,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:15,918 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:16,115 INFO L93 Difference]: Finished difference Result 610 states and 2055 transitions. [2021-08-12 18:51:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:51:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 18:51:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:16,130 INFO L225 Difference]: With dead ends: 610 [2021-08-12 18:51:16,130 INFO L226 Difference]: Without dead ends: 591 [2021-08-12 18:51:16,132 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:51:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-12 18:51:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2021-08-12 18:51:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 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 18:51:16,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2021-08-12 18:51:16,189 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2021-08-12 18:51:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:16,189 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2021-08-12 18:51:16,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2021-08-12 18:51:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 18:51:16,193 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:16,193 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:16,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:51:16,193 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1372690376, now seen corresponding path program 1 times [2021-08-12 18:51:16,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:16,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123949489] [2021-08-12 18:51:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:16,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:16,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123949489] [2021-08-12 18:51:16,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123949489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:16,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774171143] [2021-08-12 18:51:16,236 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 18:51:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 18:51:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:16,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774171143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:16,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:16,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 18:51:16,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234350885] [2021-08-12 18:51:16,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:16,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:16,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:16,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:16,413 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:16,595 INFO L93 Difference]: Finished difference Result 1013 states and 3272 transitions. [2021-08-12 18:51:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:51:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 18:51:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:16,603 INFO L225 Difference]: With dead ends: 1013 [2021-08-12 18:51:16,603 INFO L226 Difference]: Without dead ends: 847 [2021-08-12 18:51:16,605 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-08-12 18:51:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 440. [2021-08-12 18:51:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 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 18:51:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2021-08-12 18:51:16,647 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2021-08-12 18:51:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:16,647 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2021-08-12 18:51:16,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2021-08-12 18:51:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 18:51:16,653 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:16,653 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:16,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 18:51:16,860 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:16,860 INFO L82 PathProgramCache]: Analyzing trace with hash -910224837, now seen corresponding path program 1 times [2021-08-12 18:51:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:16,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23683797] [2021-08-12 18:51:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:17,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:17,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23683797] [2021-08-12 18:51:17,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23683797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:17,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716855911] [2021-08-12 18:51:17,040 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) [2021-08-12 18:51:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:17,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716855911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:17,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:17,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-12 18:51:17,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922075090] [2021-08-12 18:51:17,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:17,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:17,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:17,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:17,204 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:17,671 INFO L93 Difference]: Finished difference Result 1745 states and 5765 transitions. [2021-08-12 18:51:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:51:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 18:51:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:17,680 INFO L225 Difference]: With dead ends: 1745 [2021-08-12 18:51:17,680 INFO L226 Difference]: Without dead ends: 1415 [2021-08-12 18:51:17,683 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:51:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-08-12 18:51:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2021-08-12 18:51:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 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 18:51:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2021-08-12 18:51:17,710 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2021-08-12 18:51:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:17,710 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2021-08-12 18:51:17,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2021-08-12 18:51:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 18:51:17,712 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:17,712 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:17,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:17,929 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1302877552, now seen corresponding path program 1 times [2021-08-12 18:51:17,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:17,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913007954] [2021-08-12 18:51:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:17,977 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 18:51:17,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:17,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913007954] [2021-08-12 18:51:17,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913007954] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:17,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:17,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:17,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177146655] [2021-08-12 18:51:17,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:17,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:17,979 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:18,122 INFO L93 Difference]: Finished difference Result 1345 states and 4622 transitions. [2021-08-12 18:51:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 18:51:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:18,129 INFO L225 Difference]: With dead ends: 1345 [2021-08-12 18:51:18,130 INFO L226 Difference]: Without dead ends: 1119 [2021-08-12 18:51:18,130 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-08-12 18:51:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 792. [2021-08-12 18:51:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4829329962073325) internal successors, (2755), 791 states have internal predecessors, (2755), 0 states have call successors, (0), 0 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 18:51:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2755 transitions. [2021-08-12 18:51:18,160 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2755 transitions. Word has length 18 [2021-08-12 18:51:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:18,160 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2755 transitions. [2021-08-12 18:51:18,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2755 transitions. [2021-08-12 18:51:18,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 18:51:18,162 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:18,162 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:18,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 18:51:18,162 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:18,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1936831982, now seen corresponding path program 2 times [2021-08-12 18:51:18,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:18,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742284466] [2021-08-12 18:51:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:18,209 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 18:51:18,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:18,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742284466] [2021-08-12 18:51:18,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742284466] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:18,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:18,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:18,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720845501] [2021-08-12 18:51:18,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:18,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:18,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:18,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:18,212 INFO L87 Difference]: Start difference. First operand 792 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:18,349 INFO L93 Difference]: Finished difference Result 1369 states and 4637 transitions. [2021-08-12 18:51:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 18:51:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:18,355 INFO L225 Difference]: With dead ends: 1369 [2021-08-12 18:51:18,355 INFO L226 Difference]: Without dead ends: 1199 [2021-08-12 18:51:18,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-08-12 18:51:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 810. [2021-08-12 18:51:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4561186650185416) internal successors, (2796), 809 states have internal predecessors, (2796), 0 states have call successors, (0), 0 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 18:51:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2796 transitions. [2021-08-12 18:51:18,389 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2796 transitions. Word has length 18 [2021-08-12 18:51:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:18,390 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2796 transitions. [2021-08-12 18:51:18,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2796 transitions. [2021-08-12 18:51:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 18:51:18,392 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:18,392 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:18,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 18:51:18,392 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1545690414, now seen corresponding path program 2 times [2021-08-12 18:51:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:18,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458289809] [2021-08-12 18:51:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:18,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458289809] [2021-08-12 18:51:18,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458289809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315296103] [2021-08-12 18:51:18,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:18,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:18,584 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 18:51:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315296103] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:18,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 18:51:18,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-08-12 18:51:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61952795] [2021-08-12 18:51:18,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:18,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:18,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:18,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:18,587 INFO L87 Difference]: Start difference. First operand 810 states and 2796 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:18,802 INFO L93 Difference]: Finished difference Result 1379 states and 4563 transitions. [2021-08-12 18:51:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:51:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 18:51:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:18,809 INFO L225 Difference]: With dead ends: 1379 [2021-08-12 18:51:18,809 INFO L226 Difference]: Without dead ends: 1220 [2021-08-12 18:51:18,810 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-08-12 18:51:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 804. [2021-08-12 18:51:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.460772104607721) internal successors, (2779), 803 states have internal predecessors, (2779), 0 states have call successors, (0), 0 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 18:51:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2779 transitions. [2021-08-12 18:51:18,841 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2779 transitions. Word has length 18 [2021-08-12 18:51:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:18,841 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2779 transitions. [2021-08-12 18:51:18,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2779 transitions. [2021-08-12 18:51:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 18:51:18,843 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:18,843 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:19,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:19,059 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash -678642568, now seen corresponding path program 3 times [2021-08-12 18:51:19,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:19,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360941299] [2021-08-12 18:51:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:19,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360941299] [2021-08-12 18:51:19,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360941299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:19,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707636381] [2021-08-12 18:51:19,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:19,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:51:19,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:19,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:19,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:19,198 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 18:51:19,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707636381] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:19,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 18:51:19,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-08-12 18:51:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268259110] [2021-08-12 18:51:19,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:51:19,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:19,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:51:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:19,199 INFO L87 Difference]: Start difference. First operand 804 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:19,497 INFO L93 Difference]: Finished difference Result 1699 states and 5762 transitions. [2021-08-12 18:51:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:19,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 18:51:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:19,506 INFO L225 Difference]: With dead ends: 1699 [2021-08-12 18:51:19,506 INFO L226 Difference]: Without dead ends: 1614 [2021-08-12 18:51:19,506 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-08-12 18:51:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 817. [2021-08-12 18:51:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.450980392156863) internal successors, (2816), 816 states have internal predecessors, (2816), 0 states have call successors, (0), 0 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 18:51:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2816 transitions. [2021-08-12 18:51:19,544 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2816 transitions. Word has length 18 [2021-08-12 18:51:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:19,545 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2816 transitions. [2021-08-12 18:51:19,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2816 transitions. [2021-08-12 18:51:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 18:51:19,548 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:19,548 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:51:19,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:19,763 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:19,763 INFO L82 PathProgramCache]: Analyzing trace with hash -437071600, now seen corresponding path program 4 times [2021-08-12 18:51:19,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:19,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636878319] [2021-08-12 18:51:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:19,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:19,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636878319] [2021-08-12 18:51:19,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636878319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:19,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644753663] [2021-08-12 18:51:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 18:51:19,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:19,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:19,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:51:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:19,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644753663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:19,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:19,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-12 18:51:19,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126827093] [2021-08-12 18:51:19,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:19,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:19,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:19,897 INFO L87 Difference]: Start difference. First operand 817 states and 2816 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:20,097 INFO L93 Difference]: Finished difference Result 1420 states and 4754 transitions. [2021-08-12 18:51:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:20,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 18:51:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:20,105 INFO L225 Difference]: With dead ends: 1420 [2021-08-12 18:51:20,105 INFO L226 Difference]: Without dead ends: 1116 [2021-08-12 18:51:20,106 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-12 18:51:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 707. [2021-08-12 18:51:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.4674220963172804) internal successors, (2448), 706 states have internal predecessors, (2448), 0 states have call successors, (0), 0 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 18:51:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2448 transitions. [2021-08-12 18:51:20,138 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2448 transitions. Word has length 18 [2021-08-12 18:51:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:20,138 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2448 transitions. [2021-08-12 18:51:20,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2448 transitions. [2021-08-12 18:51:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:51:20,140 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:20,140 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 18:51:20,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:20,353 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -517394769, now seen corresponding path program 1 times [2021-08-12 18:51:20,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:20,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639528995] [2021-08-12 18:51:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:20,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639528995] [2021-08-12 18:51:20,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639528995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559241100] [2021-08-12 18:51:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:51:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:20,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:51:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:20,474 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 18:51:20,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:20,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:20,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:20,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-08-12 18:51:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:20,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559241100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:20,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:20,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-12 18:51:20,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633936486] [2021-08-12 18:51:20,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:20,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:20,506 INFO L87 Difference]: Start difference. First operand 707 states and 2448 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:21,562 INFO L93 Difference]: Finished difference Result 3962 states and 13350 transitions. [2021-08-12 18:51:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 18:51:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:51:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:21,582 INFO L225 Difference]: With dead ends: 3962 [2021-08-12 18:51:21,582 INFO L226 Difference]: Without dead ends: 3619 [2021-08-12 18:51:21,583 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 478.4ms TimeCoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2021-08-12 18:51:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-08-12 18:51:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 1302. [2021-08-12 18:51:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.6541122213681785) internal successors, (4754), 1301 states have internal predecessors, (4754), 0 states have call successors, (0), 0 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 18:51:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4754 transitions. [2021-08-12 18:51:21,676 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4754 transitions. Word has length 21 [2021-08-12 18:51:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:21,676 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4754 transitions. [2021-08-12 18:51:21,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4754 transitions. [2021-08-12 18:51:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:51:21,679 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:21,679 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 18:51:21,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:21,893 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:21,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1831057363, now seen corresponding path program 1 times [2021-08-12 18:51:21,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:21,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991115822] [2021-08-12 18:51:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:21,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991115822] [2021-08-12 18:51:21,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991115822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079108247] [2021-08-12 18:51:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:21,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:51:21,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:22,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079108247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:22,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:22,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-12 18:51:22,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968491537] [2021-08-12 18:51:22,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:22,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:22,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:22,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:22,052 INFO L87 Difference]: Start difference. First operand 1302 states and 4754 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:23,075 INFO L93 Difference]: Finished difference Result 4369 states and 14843 transitions. [2021-08-12 18:51:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 18:51:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:51:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:23,093 INFO L225 Difference]: With dead ends: 4369 [2021-08-12 18:51:23,093 INFO L226 Difference]: Without dead ends: 3583 [2021-08-12 18:51:23,095 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:51:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-08-12 18:51:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 1499. [2021-08-12 18:51:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.6348464619492655) internal successors, (5445), 1498 states have internal predecessors, (5445), 0 states have call successors, (0), 0 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 18:51:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5445 transitions. [2021-08-12 18:51:23,181 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5445 transitions. Word has length 21 [2021-08-12 18:51:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:23,181 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5445 transitions. [2021-08-12 18:51:23,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5445 transitions. [2021-08-12 18:51:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:51:23,185 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:23,185 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 18:51:23,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 18:51:23,401 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:23,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1851685711, now seen corresponding path program 2 times [2021-08-12 18:51:23,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:23,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461530550] [2021-08-12 18:51:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:23,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461530550] [2021-08-12 18:51:23,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461530550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428108609] [2021-08-12 18:51:23,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:23,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:23,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:23,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:51:23,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:23,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428108609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:23,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:23,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-12 18:51:23,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739264546] [2021-08-12 18:51:23,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:23,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:23,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:23,523 INFO L87 Difference]: Start difference. First operand 1499 states and 5445 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:24,000 INFO L93 Difference]: Finished difference Result 3071 states and 10752 transitions. [2021-08-12 18:51:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:51:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:24,023 INFO L225 Difference]: With dead ends: 3071 [2021-08-12 18:51:24,024 INFO L226 Difference]: Without dead ends: 2934 [2021-08-12 18:51:24,025 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-08-12 18:51:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1307. [2021-08-12 18:51:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.627105666156202) internal successors, (4737), 1306 states have internal predecessors, (4737), 0 states have call successors, (0), 0 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 18:51:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4737 transitions. [2021-08-12 18:51:24,100 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4737 transitions. Word has length 21 [2021-08-12 18:51:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:24,100 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4737 transitions. [2021-08-12 18:51:24,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4737 transitions. [2021-08-12 18:51:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:51:24,103 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:24,103 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 18:51:24,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 18:51:24,317 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash 801774587, now seen corresponding path program 3 times [2021-08-12 18:51:24,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:24,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792431088] [2021-08-12 18:51:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:24,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:24,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792431088] [2021-08-12 18:51:24,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792431088] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:24,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:24,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:24,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570880495] [2021-08-12 18:51:24,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:24,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:24,338 INFO L87 Difference]: Start difference. First operand 1307 states and 4737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:24,626 INFO L93 Difference]: Finished difference Result 2286 states and 8084 transitions. [2021-08-12 18:51:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:24,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:24,633 INFO L225 Difference]: With dead ends: 2286 [2021-08-12 18:51:24,633 INFO L226 Difference]: Without dead ends: 2063 [2021-08-12 18:51:24,634 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-08-12 18:51:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1303. [2021-08-12 18:51:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.6267281105990783) internal successors, (4722), 1302 states have internal predecessors, (4722), 0 states have call successors, (0), 0 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 18:51:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4722 transitions. [2021-08-12 18:51:24,704 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4722 transitions. Word has length 21 [2021-08-12 18:51:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:24,705 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4722 transitions. [2021-08-12 18:51:24,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4722 transitions. [2021-08-12 18:51:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:51:24,707 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:24,707 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 18:51:24,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-12 18:51:24,708 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2028027159, now seen corresponding path program 2 times [2021-08-12 18:51:24,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:24,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475271750] [2021-08-12 18:51:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:24,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:24,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475271750] [2021-08-12 18:51:24,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475271750] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:24,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:24,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:24,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502189444] [2021-08-12 18:51:24,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:24,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:24,727 INFO L87 Difference]: Start difference. First operand 1303 states and 4722 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:25,001 INFO L93 Difference]: Finished difference Result 2236 states and 7916 transitions. [2021-08-12 18:51:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:25,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:25,008 INFO L225 Difference]: With dead ends: 2236 [2021-08-12 18:51:25,008 INFO L226 Difference]: Without dead ends: 2045 [2021-08-12 18:51:25,009 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-08-12 18:51:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1327. [2021-08-12 18:51:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.6093514328808447) internal successors, (4786), 1326 states have internal predecessors, (4786), 0 states have call successors, (0), 0 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 18:51:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4786 transitions. [2021-08-12 18:51:25,082 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4786 transitions. Word has length 21 [2021-08-12 18:51:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:25,083 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4786 transitions. [2021-08-12 18:51:25,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4786 transitions. [2021-08-12 18:51:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:51:25,085 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:25,086 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 18:51:25,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-12 18:51:25,086 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:25,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312109, now seen corresponding path program 4 times [2021-08-12 18:51:25,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:25,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381634925] [2021-08-12 18:51:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:25,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:25,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381634925] [2021-08-12 18:51:25,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381634925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:51:25,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:51:25,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:51:25,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546854307] [2021-08-12 18:51:25,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:51:25,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:25,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:51:25,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:51:25,107 INFO L87 Difference]: Start difference. First operand 1327 states and 4786 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:25,369 INFO L93 Difference]: Finished difference Result 1979 states and 7148 transitions. [2021-08-12 18:51:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:51:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:25,375 INFO L225 Difference]: With dead ends: 1979 [2021-08-12 18:51:25,375 INFO L226 Difference]: Without dead ends: 1840 [2021-08-12 18:51:25,376 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-08-12 18:51:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1265. [2021-08-12 18:51:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.6360759493670884) internal successors, (4596), 1264 states have internal predecessors, (4596), 0 states have call successors, (0), 0 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 18:51:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4596 transitions. [2021-08-12 18:51:25,444 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4596 transitions. Word has length 21 [2021-08-12 18:51:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:25,444 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4596 transitions. [2021-08-12 18:51:25,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 18:51:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4596 transitions. [2021-08-12 18:51:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:25,446 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:25,446 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 18:51:25,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-12 18:51:25,446 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1455380781, now seen corresponding path program 1 times [2021-08-12 18:51:25,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:25,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88679302] [2021-08-12 18:51:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:25,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:25,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88679302] [2021-08-12 18:51:25,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88679302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:25,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465063648] [2021-08-12 18:51:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:51:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:25,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465063648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:25,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:25,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:51:25,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676178617] [2021-08-12 18:51:25,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:51:25,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:51:25,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:25,634 INFO L87 Difference]: Start difference. First operand 1265 states and 4596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:26,434 INFO L93 Difference]: Finished difference Result 3758 states and 13007 transitions. [2021-08-12 18:51:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:51:26,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:26,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:26,443 INFO L225 Difference]: With dead ends: 3758 [2021-08-12 18:51:26,444 INFO L226 Difference]: Without dead ends: 3032 [2021-08-12 18:51:26,445 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:51:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-08-12 18:51:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2042. [2021-08-12 18:51:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 3.724154826065654) internal successors, (7601), 2041 states have internal predecessors, (7601), 0 states have call successors, (0), 0 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 18:51:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7601 transitions. [2021-08-12 18:51:26,569 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7601 transitions. Word has length 24 [2021-08-12 18:51:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:26,569 INFO L482 AbstractCegarLoop]: Abstraction has 2042 states and 7601 transitions. [2021-08-12 18:51:26,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7601 transitions. [2021-08-12 18:51:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:26,573 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:26,573 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 18:51:26,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 18:51:26,791 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2096711821, now seen corresponding path program 2 times [2021-08-12 18:51:26,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:26,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034720730] [2021-08-12 18:51:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:26,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:26,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034720730] [2021-08-12 18:51:26,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034720730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:26,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011642934] [2021-08-12 18:51:26,843 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 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 18:51:26,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:26,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011642934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:26,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:26,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:51:26,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659469720] [2021-08-12 18:51:26,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:51:26,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:26,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:51:26,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:26,969 INFO L87 Difference]: Start difference. First operand 2042 states and 7601 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:27,674 INFO L93 Difference]: Finished difference Result 3821 states and 13275 transitions. [2021-08-12 18:51:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:51:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:27,692 INFO L225 Difference]: With dead ends: 3821 [2021-08-12 18:51:27,692 INFO L226 Difference]: Without dead ends: 3419 [2021-08-12 18:51:27,693 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:51:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-08-12 18:51:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 2196. [2021-08-12 18:51:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.7599088838268795) internal successors, (8253), 2195 states have internal predecessors, (8253), 0 states have call successors, (0), 0 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 18:51:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8253 transitions. [2021-08-12 18:51:27,825 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8253 transitions. Word has length 24 [2021-08-12 18:51:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:27,825 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8253 transitions. [2021-08-12 18:51:27,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8253 transitions. [2021-08-12 18:51:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:27,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:27,830 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 18:51:28,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 18:51:28,044 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash -337245367, now seen corresponding path program 3 times [2021-08-12 18:51:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:28,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217159520] [2021-08-12 18:51:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:28,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:28,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217159520] [2021-08-12 18:51:28,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217159520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:28,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045971917] [2021-08-12 18:51:28,109 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 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 18:51:28,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:51:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:28,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045971917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:28,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:28,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:51:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295134657] [2021-08-12 18:51:28,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:51:28,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:51:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:28,245 INFO L87 Difference]: Start difference. First operand 2196 states and 8253 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:29,213 INFO L93 Difference]: Finished difference Result 4187 states and 15175 transitions. [2021-08-12 18:51:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:51:29,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:29,224 INFO L225 Difference]: With dead ends: 4187 [2021-08-12 18:51:29,224 INFO L226 Difference]: Without dead ends: 3585 [2021-08-12 18:51:29,225 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:51:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-08-12 18:51:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2406. [2021-08-12 18:51:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 3.761330561330561) internal successors, (9046), 2405 states have internal predecessors, (9046), 0 states have call successors, (0), 0 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 18:51:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 9046 transitions. [2021-08-12 18:51:29,365 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 9046 transitions. Word has length 24 [2021-08-12 18:51:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:29,365 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 9046 transitions. [2021-08-12 18:51:29,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 9046 transitions. [2021-08-12 18:51:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:29,369 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:29,369 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 18:51:29,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 18:51:29,585 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1257907469, now seen corresponding path program 1 times [2021-08-12 18:51:29,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:29,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504566245] [2021-08-12 18:51:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:29,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:29,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504566245] [2021-08-12 18:51:29,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504566245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:29,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083408417] [2021-08-12 18:51:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:51:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:29,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:29,694 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 16 treesize of output 12 [2021-08-12 18:51:29,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:29,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:29,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:29,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-08-12 18:51:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:29,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083408417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:29,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:29,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:51:29,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034861163] [2021-08-12 18:51:29,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:29,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:29,722 INFO L87 Difference]: Start difference. First operand 2406 states and 9046 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 18:51:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:30,513 INFO L93 Difference]: Finished difference Result 5871 states and 21667 transitions. [2021-08-12 18:51:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:30,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 24 [2021-08-12 18:51:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:30,535 INFO L225 Difference]: With dead ends: 5871 [2021-08-12 18:51:30,535 INFO L226 Difference]: Without dead ends: 3609 [2021-08-12 18:51:30,537 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-08-12 18:51:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2825. [2021-08-12 18:51:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 3.685198300283286) internal successors, (10407), 2824 states have internal predecessors, (10407), 0 states have call successors, (0), 0 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 18:51:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10407 transitions. [2021-08-12 18:51:30,701 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10407 transitions. Word has length 24 [2021-08-12 18:51:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:30,701 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10407 transitions. [2021-08-12 18:51:30,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 18:51:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10407 transitions. [2021-08-12 18:51:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:30,706 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:30,706 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 18:51:30,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 18:51:30,911 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash -37818295, now seen corresponding path program 2 times [2021-08-12 18:51:30,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:30,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516145958] [2021-08-12 18:51:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:30,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:30,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516145958] [2021-08-12 18:51:30,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516145958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:30,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755060966] [2021-08-12 18:51:30,962 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 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 18:51:30,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:30,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:30,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:30,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:31,024 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 16 treesize of output 12 [2021-08-12 18:51:31,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:31,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:31,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:31,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-08-12 18:51:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:31,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755060966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:31,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:31,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:51:31,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686760] [2021-08-12 18:51:31,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:31,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:31,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:31,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:31,047 INFO L87 Difference]: Start difference. First operand 2825 states and 10407 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:31,982 INFO L93 Difference]: Finished difference Result 6797 states and 24940 transitions. [2021-08-12 18:51:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:31,995 INFO L225 Difference]: With dead ends: 6797 [2021-08-12 18:51:31,995 INFO L226 Difference]: Without dead ends: 4907 [2021-08-12 18:51:31,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-08-12 18:51:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 3559. [2021-08-12 18:51:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 3.7141652613827993) internal successors, (13215), 3558 states have internal predecessors, (13215), 0 states have call successors, (0), 0 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 18:51:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 13215 transitions. [2021-08-12 18:51:32,215 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 13215 transitions. Word has length 24 [2021-08-12 18:51:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:32,215 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 13215 transitions. [2021-08-12 18:51:32,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 13215 transitions. [2021-08-12 18:51:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:32,221 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:32,221 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 18:51:32,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:32,437 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1702471575, now seen corresponding path program 1 times [2021-08-12 18:51:32,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:32,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158478478] [2021-08-12 18:51:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:32,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158478478] [2021-08-12 18:51:32,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158478478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235966884] [2021-08-12 18:51:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:32,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235966884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:32,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:32,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:51:32,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203605575] [2021-08-12 18:51:32,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:51:32,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:51:32,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:32,736 INFO L87 Difference]: Start difference. First operand 3559 states and 13215 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:33,490 INFO L93 Difference]: Finished difference Result 4548 states and 16464 transitions. [2021-08-12 18:51:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:33,503 INFO L225 Difference]: With dead ends: 4548 [2021-08-12 18:51:33,503 INFO L226 Difference]: Without dead ends: 3762 [2021-08-12 18:51:33,505 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:51:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-08-12 18:51:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3576. [2021-08-12 18:51:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 3.7023776223776226) internal successors, (13236), 3575 states have internal predecessors, (13236), 0 states have call successors, (0), 0 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 18:51:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 13236 transitions. [2021-08-12 18:51:33,739 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 13236 transitions. Word has length 24 [2021-08-12 18:51:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:33,739 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 13236 transitions. [2021-08-12 18:51:33,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 13236 transitions. [2021-08-12 18:51:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:33,745 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:33,745 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 18:51:33,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:33,961 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:33,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1483062673, now seen corresponding path program 2 times [2021-08-12 18:51:33,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:33,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645340512] [2021-08-12 18:51:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:34,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:34,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645340512] [2021-08-12 18:51:34,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645340512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:34,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700035510] [2021-08-12 18:51:34,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:34,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:34,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:34,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700035510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:34,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:34,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:51:34,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89705460] [2021-08-12 18:51:34,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:51:34,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:51:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:34,197 INFO L87 Difference]: Start difference. First operand 3576 states and 13236 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:35,067 INFO L93 Difference]: Finished difference Result 4604 states and 16615 transitions. [2021-08-12 18:51:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:35,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:35,079 INFO L225 Difference]: With dead ends: 4604 [2021-08-12 18:51:35,079 INFO L226 Difference]: Without dead ends: 3615 [2021-08-12 18:51:35,081 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:51:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-08-12 18:51:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3429. [2021-08-12 18:51:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.731330221703617) internal successors, (12791), 3428 states have internal predecessors, (12791), 0 states have call successors, (0), 0 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 18:51:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12791 transitions. [2021-08-12 18:51:35,282 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12791 transitions. Word has length 24 [2021-08-12 18:51:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:35,283 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12791 transitions. [2021-08-12 18:51:35,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12791 transitions. [2021-08-12 18:51:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:35,289 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:35,289 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 18:51:35,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 18:51:35,505 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash -712088919, now seen corresponding path program 1 times [2021-08-12 18:51:35,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:35,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751341312] [2021-08-12 18:51:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:35,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751341312] [2021-08-12 18:51:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751341312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437122041] [2021-08-12 18:51:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order 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 18:51:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 18:51:35,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:35,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437122041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:35,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:35,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-12 18:51:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130775578] [2021-08-12 18:51:35,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:51:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:35,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:51:35,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:35,748 INFO L87 Difference]: Start difference. First operand 3429 states and 12791 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:36,736 INFO L93 Difference]: Finished difference Result 6424 states and 23505 transitions. [2021-08-12 18:51:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:36,749 INFO L225 Difference]: With dead ends: 6424 [2021-08-12 18:51:36,749 INFO L226 Difference]: Without dead ends: 3821 [2021-08-12 18:51:36,752 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:51:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-08-12 18:51:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3319. [2021-08-12 18:51:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.648583484026522) internal successors, (12106), 3318 states have internal predecessors, (12106), 0 states have call successors, (0), 0 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 18:51:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 12106 transitions. [2021-08-12 18:51:36,958 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 12106 transitions. Word has length 24 [2021-08-12 18:51:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:36,958 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 12106 transitions. [2021-08-12 18:51:36,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 12106 transitions. [2021-08-12 18:51:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:36,964 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:36,964 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 18:51:37,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:37,164 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1948181261, now seen corresponding path program 1 times [2021-08-12 18:51:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:37,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671227427] [2021-08-12 18:51:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:37,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:37,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671227427] [2021-08-12 18:51:37,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671227427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:37,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766675859] [2021-08-12 18:51:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:37,298 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 18:51:37,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:37,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:37,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:37,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-08-12 18:51:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:37,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766675859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:37,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:37,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-12 18:51:37,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345937104] [2021-08-12 18:51:37,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:37,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:37,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:37,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:37,329 INFO L87 Difference]: Start difference. First operand 3319 states and 12106 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 18:51:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:38,173 INFO L93 Difference]: Finished difference Result 5764 states and 21075 transitions. [2021-08-12 18:51:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 24 [2021-08-12 18:51:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:38,186 INFO L225 Difference]: With dead ends: 5764 [2021-08-12 18:51:38,187 INFO L226 Difference]: Without dead ends: 4198 [2021-08-12 18:51:38,189 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-08-12 18:51:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3613. [2021-08-12 18:51:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 3.638704318936877) internal successors, (13143), 3612 states have internal predecessors, (13143), 0 states have call successors, (0), 0 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 18:51:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 13143 transitions. [2021-08-12 18:51:38,492 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 13143 transitions. Word has length 24 [2021-08-12 18:51:38,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:38,492 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 13143 transitions. [2021-08-12 18:51:38,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 18:51:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 13143 transitions. [2021-08-12 18:51:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:38,499 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:38,499 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 18:51:38,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 18:51:38,699 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:38,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1874823949, now seen corresponding path program 3 times [2021-08-12 18:51:38,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:38,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549287748] [2021-08-12 18:51:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:38,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:38,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549287748] [2021-08-12 18:51:38,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549287748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:38,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017024431] [2021-08-12 18:51:38,753 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 18:51:38,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:51:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:38,814 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 16 treesize of output 12 [2021-08-12 18:51:38,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:38,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:38,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:38,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-08-12 18:51:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:38,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017024431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:38,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:38,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:51:38,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22293796] [2021-08-12 18:51:38,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:38,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:38,846 INFO L87 Difference]: Start difference. First operand 3613 states and 13143 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 18:51:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:39,635 INFO L93 Difference]: Finished difference Result 5369 states and 19401 transitions. [2021-08-12 18:51:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 24 [2021-08-12 18:51:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:39,648 INFO L225 Difference]: With dead ends: 5369 [2021-08-12 18:51:39,648 INFO L226 Difference]: Without dead ends: 3464 [2021-08-12 18:51:39,650 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-08-12 18:51:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3015. [2021-08-12 18:51:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.6250829462508296) internal successors, (10926), 3014 states have internal predecessors, (10926), 0 states have call successors, (0), 0 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 18:51:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 10926 transitions. [2021-08-12 18:51:39,832 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 10926 transitions. Word has length 24 [2021-08-12 18:51:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:39,832 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 10926 transitions. [2021-08-12 18:51:39,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 18:51:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 10926 transitions. [2021-08-12 18:51:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:39,837 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:39,837 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 18:51:40,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 18:51:40,038 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash -853710037, now seen corresponding path program 4 times [2021-08-12 18:51:40,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:40,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169585295] [2021-08-12 18:51:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:40,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:40,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169585295] [2021-08-12 18:51:40,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169585295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:40,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247346953] [2021-08-12 18:51:40,087 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 18:51:40,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:40,148 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 18:51:40,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:40,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:40,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:40,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-08-12 18:51:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:40,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247346953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:40,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:40,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-12 18:51:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674106672] [2021-08-12 18:51:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:40,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:40,170 INFO L87 Difference]: Start difference. First operand 3015 states and 10926 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:51:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:40,862 INFO L93 Difference]: Finished difference Result 4242 states and 15294 transitions. [2021-08-12 18:51:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:40,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 18:51:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:40,874 INFO L225 Difference]: With dead ends: 4242 [2021-08-12 18:51:40,874 INFO L226 Difference]: Without dead ends: 3294 [2021-08-12 18:51:40,875 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-08-12 18:51:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3106. [2021-08-12 18:51:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 3.61256038647343) internal successors, (11217), 3105 states have internal predecessors, (11217), 0 states have call successors, (0), 0 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 18:51:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 11217 transitions. [2021-08-12 18:51:41,063 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 11217 transitions. Word has length 24 [2021-08-12 18:51:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:41,063 INFO L482 AbstractCegarLoop]: Abstraction has 3106 states and 11217 transitions. [2021-08-12 18:51:41,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:51:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 11217 transitions. [2021-08-12 18:51:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:41,068 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:41,068 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 18:51:41,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 18:51:41,273 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1540696521, now seen corresponding path program 5 times [2021-08-12 18:51:41,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:41,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650727140] [2021-08-12 18:51:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:41,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650727140] [2021-08-12 18:51:41,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650727140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127378350] [2021-08-12 18:51:41,320 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 18:51:41,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:51:41,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:41,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:41,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:41,380 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 16 treesize of output 12 [2021-08-12 18:51:41,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:41,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:41,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:41,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-08-12 18:51:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127378350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:41,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:41,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:51:41,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664487198] [2021-08-12 18:51:41,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:41,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:41,419 INFO L87 Difference]: Start difference. First operand 3106 states and 11217 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:42,234 INFO L93 Difference]: Finished difference Result 5337 states and 19136 transitions. [2021-08-12 18:51:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:42,249 INFO L225 Difference]: With dead ends: 5337 [2021-08-12 18:51:42,249 INFO L226 Difference]: Without dead ends: 4306 [2021-08-12 18:51:42,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-08-12 18:51:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3262. [2021-08-12 18:51:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 3.609015639374425) internal successors, (11769), 3261 states have internal predecessors, (11769), 0 states have call successors, (0), 0 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 18:51:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 11769 transitions. [2021-08-12 18:51:42,458 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 11769 transitions. Word has length 24 [2021-08-12 18:51:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:42,458 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 11769 transitions. [2021-08-12 18:51:42,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 11769 transitions. [2021-08-12 18:51:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:42,464 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:42,464 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 18:51:42,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 18:51:42,664 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:42,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617495, now seen corresponding path program 3 times [2021-08-12 18:51:42,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:42,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274286979] [2021-08-12 18:51:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:42,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:42,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274286979] [2021-08-12 18:51:42,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274286979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:42,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785322698] [2021-08-12 18:51:42,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:42,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:51:42,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:42,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:42,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785322698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:42,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:42,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:51:42,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334993823] [2021-08-12 18:51:42,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:51:42,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:42,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:51:42,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:42,931 INFO L87 Difference]: Start difference. First operand 3262 states and 11769 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:43,796 INFO L93 Difference]: Finished difference Result 3883 states and 13728 transitions. [2021-08-12 18:51:43,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:43,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:43,808 INFO L225 Difference]: With dead ends: 3883 [2021-08-12 18:51:43,808 INFO L226 Difference]: Without dead ends: 3516 [2021-08-12 18:51:43,810 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:51:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-08-12 18:51:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3289. [2021-08-12 18:51:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3288 states have (on average 3.602493917274939) internal successors, (11845), 3288 states have internal predecessors, (11845), 0 states have call successors, (0), 0 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 18:51:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 11845 transitions. [2021-08-12 18:51:44,020 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 11845 transitions. Word has length 24 [2021-08-12 18:51:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:44,020 INFO L482 AbstractCegarLoop]: Abstraction has 3289 states and 11845 transitions. [2021-08-12 18:51:44,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 11845 transitions. [2021-08-12 18:51:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:44,025 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:44,025 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 18:51:44,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 18:51:44,226 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:44,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2129098641, now seen corresponding path program 6 times [2021-08-12 18:51:44,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:44,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036581449] [2021-08-12 18:51:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:44,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:44,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036581449] [2021-08-12 18:51:44,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036581449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:44,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557887289] [2021-08-12 18:51:44,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:44,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:51:44,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:44,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:44,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 18:51:44,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:44,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:44,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:44,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-08-12 18:51:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:44,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557887289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:44,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:44,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-12 18:51:44,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201849791] [2021-08-12 18:51:44,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:44,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:44,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:44,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:44,394 INFO L87 Difference]: Start difference. First operand 3289 states and 11845 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 18:51:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:45,124 INFO L93 Difference]: Finished difference Result 4195 states and 14890 transitions. [2021-08-12 18:51:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 24 [2021-08-12 18:51:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:45,137 INFO L225 Difference]: With dead ends: 4195 [2021-08-12 18:51:45,137 INFO L226 Difference]: Without dead ends: 3630 [2021-08-12 18:51:45,138 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-08-12 18:51:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3263. [2021-08-12 18:51:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.600551808706315) internal successors, (11745), 3262 states have internal predecessors, (11745), 0 states have call successors, (0), 0 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 18:51:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11745 transitions. [2021-08-12 18:51:45,390 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11745 transitions. Word has length 24 [2021-08-12 18:51:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:45,390 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 11745 transitions. [2021-08-12 18:51:45,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 18:51:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11745 transitions. [2021-08-12 18:51:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:45,396 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:45,396 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 18:51:45,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:45,596 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:45,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1434078121, now seen corresponding path program 2 times [2021-08-12 18:51:45,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:45,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620240143] [2021-08-12 18:51:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:45,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620240143] [2021-08-12 18:51:45,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620240143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819317449] [2021-08-12 18:51:45,692 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 18:51:45,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:45,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:45,751 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 16 treesize of output 12 [2021-08-12 18:51:45,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:45,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:45,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:45,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-08-12 18:51:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:45,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819317449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:45,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:45,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:51:45,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661275747] [2021-08-12 18:51:45,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:45,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:45,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:45,777 INFO L87 Difference]: Start difference. First operand 3263 states and 11745 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:46,585 INFO L93 Difference]: Finished difference Result 4720 states and 16575 transitions. [2021-08-12 18:51:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:51:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:46,600 INFO L225 Difference]: With dead ends: 4720 [2021-08-12 18:51:46,600 INFO L226 Difference]: Without dead ends: 3810 [2021-08-12 18:51:46,602 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:51:46,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-08-12 18:51:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3156. [2021-08-12 18:51:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.5984152139461174) internal successors, (11353), 3155 states have internal predecessors, (11353), 0 states have call successors, (0), 0 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 18:51:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 11353 transitions. [2021-08-12 18:51:46,832 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 11353 transitions. Word has length 24 [2021-08-12 18:51:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:46,832 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 11353 transitions. [2021-08-12 18:51:46,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 11353 transitions. [2021-08-12 18:51:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:46,837 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:46,837 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 18:51:47,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 18:51:47,044 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1862582325, now seen corresponding path program 3 times [2021-08-12 18:51:47,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:47,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316871581] [2021-08-12 18:51:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:47,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:47,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316871581] [2021-08-12 18:51:47,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316871581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583774962] [2021-08-12 18:51:47,081 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 18:51:47,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:51:47,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:47,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:47,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:47,136 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 18:51:47,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:47,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:47,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:47,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-08-12 18:51:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:47,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583774962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:47,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:47,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-12 18:51:47,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297904225] [2021-08-12 18:51:47,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:47,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:47,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:47,164 INFO L87 Difference]: Start difference. First operand 3156 states and 11353 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 18:51:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:47,843 INFO L93 Difference]: Finished difference Result 4692 states and 16939 transitions. [2021-08-12 18:51:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 24 [2021-08-12 18:51:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:47,857 INFO L225 Difference]: With dead ends: 4692 [2021-08-12 18:51:47,857 INFO L226 Difference]: Without dead ends: 3321 [2021-08-12 18:51:47,859 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-08-12 18:51:48,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2530. [2021-08-12 18:51:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.593910636615263) internal successors, (9089), 2529 states have internal predecessors, (9089), 0 states have call successors, (0), 0 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 18:51:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9089 transitions. [2021-08-12 18:51:48,037 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9089 transitions. Word has length 24 [2021-08-12 18:51:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:48,038 INFO L482 AbstractCegarLoop]: Abstraction has 2530 states and 9089 transitions. [2021-08-12 18:51:48,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 18:51:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9089 transitions. [2021-08-12 18:51:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:48,042 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:48,042 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 18:51:48,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:48,249 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 316647389, now seen corresponding path program 4 times [2021-08-12 18:51:48,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:48,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901310781] [2021-08-12 18:51:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:48,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:48,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901310781] [2021-08-12 18:51:48,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901310781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:48,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546848149] [2021-08-12 18:51:48,417 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 18:51:48,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:48,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:48,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:48,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:48,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546848149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:48,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:48,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:51:48,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780750508] [2021-08-12 18:51:48,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:51:48,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:48,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:51:48,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:48,558 INFO L87 Difference]: Start difference. First operand 2530 states and 9089 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:49,516 INFO L93 Difference]: Finished difference Result 3405 states and 11835 transitions. [2021-08-12 18:51:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:51:49,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:49,528 INFO L225 Difference]: With dead ends: 3405 [2021-08-12 18:51:49,528 INFO L226 Difference]: Without dead ends: 2711 [2021-08-12 18:51:49,529 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:51:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-08-12 18:51:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2524. [2021-08-12 18:51:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 3.594926674593738) internal successors, (9070), 2523 states have internal predecessors, (9070), 0 states have call successors, (0), 0 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 18:51:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 9070 transitions. [2021-08-12 18:51:49,725 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 9070 transitions. Word has length 24 [2021-08-12 18:51:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:49,725 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 9070 transitions. [2021-08-12 18:51:49,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 9070 transitions. [2021-08-12 18:51:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 18:51:49,729 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:49,729 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 18:51:49,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 18:51:49,937 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2118036169, now seen corresponding path program 5 times [2021-08-12 18:51:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:49,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978088224] [2021-08-12 18:51:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:50,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:50,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978088224] [2021-08-12 18:51:50,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978088224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:50,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933950710] [2021-08-12 18:51:50,052 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 18:51:50,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:51:50,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:50,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 18:51:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:51:50,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933950710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:50,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:50,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:51:50,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713467994] [2021-08-12 18:51:50,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:51:50,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:50,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:51:50,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:50,193 INFO L87 Difference]: Start difference. First operand 2524 states and 9070 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:51,308 INFO L93 Difference]: Finished difference Result 3700 states and 12711 transitions. [2021-08-12 18:51:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:51:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 18:51:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:51,320 INFO L225 Difference]: With dead ends: 3700 [2021-08-12 18:51:51,321 INFO L226 Difference]: Without dead ends: 2495 [2021-08-12 18:51:51,323 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:51:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-08-12 18:51:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2347. [2021-08-12 18:51:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.6027280477408357) internal successors, (8452), 2346 states have internal predecessors, (8452), 0 states have call successors, (0), 0 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 18:51:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8452 transitions. [2021-08-12 18:51:51,500 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8452 transitions. Word has length 24 [2021-08-12 18:51:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:51,500 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8452 transitions. [2021-08-12 18:51:51,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8452 transitions. [2021-08-12 18:51:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:51:51,504 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:51,504 INFO L550 BasicCegarLoop]: trace histogram [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 18:51:51,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:51,704 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash -579383647, now seen corresponding path program 4 times [2021-08-12 18:51:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:51,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196916665] [2021-08-12 18:51:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:51,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:51,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196916665] [2021-08-12 18:51:51,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196916665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:51,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849722314] [2021-08-12 18:51:51,738 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 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 18:51:51,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:51:51,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:51,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849722314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:51,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:51,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 18:51:51,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526193560] [2021-08-12 18:51:51,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:51,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:51,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:51,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:51,821 INFO L87 Difference]: Start difference. First operand 2347 states and 8452 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:53,142 INFO L93 Difference]: Finished difference Result 7005 states and 24378 transitions. [2021-08-12 18:51:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:51:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 18:51:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:53,161 INFO L225 Difference]: With dead ends: 7005 [2021-08-12 18:51:53,161 INFO L226 Difference]: Without dead ends: 6243 [2021-08-12 18:51:53,163 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:51:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-08-12 18:51:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3941. [2021-08-12 18:51:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 3.7758883248730966) internal successors, (14877), 3940 states have internal predecessors, (14877), 0 states have call successors, (0), 0 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 18:51:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 14877 transitions. [2021-08-12 18:51:53,458 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 14877 transitions. Word has length 27 [2021-08-12 18:51:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:53,458 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 14877 transitions. [2021-08-12 18:51:53,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 14877 transitions. [2021-08-12 18:51:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:51:53,464 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:53,464 INFO L550 BasicCegarLoop]: trace histogram [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 18:51:53,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 18:51:53,665 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:53,665 INFO L82 PathProgramCache]: Analyzing trace with hash 755204605, now seen corresponding path program 1 times [2021-08-12 18:51:53,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:53,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079565168] [2021-08-12 18:51:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:53,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:53,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079565168] [2021-08-12 18:51:53,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079565168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:53,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952933502] [2021-08-12 18:51:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order 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 18:51:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:53,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:51:53,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:53,787 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 18:51:53,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:51:53,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:51:53,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:51:53,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-08-12 18:51:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:53,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952933502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:53,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:53,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-12 18:51:53,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120311316] [2021-08-12 18:51:53,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:51:53,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:53,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:51:53,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:53,809 INFO L87 Difference]: Start difference. First operand 3941 states and 14877 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 18:51:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:54,786 INFO L93 Difference]: Finished difference Result 7547 states and 28694 transitions. [2021-08-12 18:51:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:51:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 27 [2021-08-12 18:51:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:54,803 INFO L225 Difference]: With dead ends: 7547 [2021-08-12 18:51:54,804 INFO L226 Difference]: Without dead ends: 4862 [2021-08-12 18:51:54,808 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:51:54,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-08-12 18:51:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4231. [2021-08-12 18:51:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.753900709219858) internal successors, (15879), 4230 states have internal predecessors, (15879), 0 states have call successors, (0), 0 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 18:51:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 15879 transitions. [2021-08-12 18:51:55,126 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 15879 transitions. Word has length 27 [2021-08-12 18:51:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:55,126 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 15879 transitions. [2021-08-12 18:51:55,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 18:51:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 15879 transitions. [2021-08-12 18:51:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:51:55,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:55,132 INFO L550 BasicCegarLoop]: trace histogram [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 18:51:55,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:55,337 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1627375381, now seen corresponding path program 5 times [2021-08-12 18:51:55,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:55,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834103756] [2021-08-12 18:51:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:55,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834103756] [2021-08-12 18:51:55,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834103756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040709435] [2021-08-12 18:51:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:55,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:51:55,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:55,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:55,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:55,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040709435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:55,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:55,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-08-12 18:51:55,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466122438] [2021-08-12 18:51:55,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:51:55,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:55,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:51:55,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:51:55,456 INFO L87 Difference]: Start difference. First operand 4231 states and 15879 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:56,620 INFO L93 Difference]: Finished difference Result 6081 states and 21444 transitions. [2021-08-12 18:51:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 18:51:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:56,642 INFO L225 Difference]: With dead ends: 6081 [2021-08-12 18:51:56,643 INFO L226 Difference]: Without dead ends: 5466 [2021-08-12 18:51:56,644 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:51:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-08-12 18:51:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4109. [2021-08-12 18:51:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 3.7458617332035056) internal successors, (15388), 4108 states have internal predecessors, (15388), 0 states have call successors, (0), 0 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 18:51:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 15388 transitions. [2021-08-12 18:51:56,937 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 15388 transitions. Word has length 27 [2021-08-12 18:51:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:56,937 INFO L482 AbstractCegarLoop]: Abstraction has 4109 states and 15388 transitions. [2021-08-12 18:51:56,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:51:56,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 15388 transitions. [2021-08-12 18:51:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:51:56,943 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:56,943 INFO L550 BasicCegarLoop]: trace histogram [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 18:51:57,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 18:51:57,144 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:57,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1329916833, now seen corresponding path program 6 times [2021-08-12 18:51:57,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:57,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997813178] [2021-08-12 18:51:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:57,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:57,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997813178] [2021-08-12 18:51:57,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997813178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:57,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211038172] [2021-08-12 18:51:57,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:57,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 18:51:57,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:51:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:57,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211038172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:57,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:57,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-08-12 18:51:57,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462085693] [2021-08-12 18:51:57,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:51:57,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:57,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:51:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:51:57,245 INFO L87 Difference]: Start difference. First operand 4109 states and 15388 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:51:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:51:58,801 INFO L93 Difference]: Finished difference Result 8658 states and 31848 transitions. [2021-08-12 18:51:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:51:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 18:51:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:51:58,828 INFO L225 Difference]: With dead ends: 8658 [2021-08-12 18:51:58,828 INFO L226 Difference]: Without dead ends: 8340 [2021-08-12 18:51:58,830 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:51:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-08-12 18:51:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 5370. [2021-08-12 18:51:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.8379586515179738) internal successors, (20606), 5369 states have internal predecessors, (20606), 0 states have call successors, (0), 0 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 18:51:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 20606 transitions. [2021-08-12 18:51:59,213 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 20606 transitions. Word has length 27 [2021-08-12 18:51:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:51:59,213 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 20606 transitions. [2021-08-12 18:51:59,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:51:59,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 20606 transitions. [2021-08-12 18:51:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:51:59,222 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:51:59,222 INFO L550 BasicCegarLoop]: trace histogram [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 18:51:59,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:59,422 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:51:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:51:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1648096775, now seen corresponding path program 7 times [2021-08-12 18:51:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:51:59,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300364307] [2021-08-12 18:51:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:51:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:51:59,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:51:59,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300364307] [2021-08-12 18:51:59,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300364307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:59,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861271008] [2021-08-12 18:51:59,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:51:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:51:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:51:59,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:51:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:51:59,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861271008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:51:59,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:51:59,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-12 18:51:59,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943657818] [2021-08-12 18:51:59,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:51:59,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:51:59,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:51:59,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:51:59,543 INFO L87 Difference]: Start difference. First operand 5370 states and 20606 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:01,194 INFO L93 Difference]: Finished difference Result 8621 states and 31582 transitions. [2021-08-12 18:52:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:52:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 18:52:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:01,220 INFO L225 Difference]: With dead ends: 8621 [2021-08-12 18:52:01,220 INFO L226 Difference]: Without dead ends: 8251 [2021-08-12 18:52:01,222 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-08-12 18:52:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 5352. [2021-08-12 18:52:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.834984115118669) internal successors, (20521), 5351 states have internal predecessors, (20521), 0 states have call successors, (0), 0 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 18:52:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 20521 transitions. [2021-08-12 18:52:01,609 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 20521 transitions. Word has length 27 [2021-08-12 18:52:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:01,609 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 20521 transitions. [2021-08-12 18:52:01,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 20521 transitions. [2021-08-12 18:52:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:52:01,618 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:01,618 INFO L550 BasicCegarLoop]: trace histogram [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 18:52:01,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 18:52:01,818 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash 888507809, now seen corresponding path program 8 times [2021-08-12 18:52:01,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:01,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377409542] [2021-08-12 18:52:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:01,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:01,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377409542] [2021-08-12 18:52:01,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377409542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:01,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667904917] [2021-08-12 18:52:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:01,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:01,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:01,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667904917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:01,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:01,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 18:52:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402261057] [2021-08-12 18:52:01,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:52:01,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:01,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:52:01,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:01,962 INFO L87 Difference]: Start difference. First operand 5352 states and 20521 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:03,610 INFO L93 Difference]: Finished difference Result 8301 states and 30588 transitions. [2021-08-12 18:52:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:52:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 18:52:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:03,636 INFO L225 Difference]: With dead ends: 8301 [2021-08-12 18:52:03,636 INFO L226 Difference]: Without dead ends: 7871 [2021-08-12 18:52:03,638 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:52:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-08-12 18:52:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5590. [2021-08-12 18:52:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5589 states have (on average 3.8017534442655214) internal successors, (21248), 5589 states have internal predecessors, (21248), 0 states have call successors, (0), 0 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 18:52:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 21248 transitions. [2021-08-12 18:52:04,099 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 21248 transitions. Word has length 27 [2021-08-12 18:52:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:04,100 INFO L482 AbstractCegarLoop]: Abstraction has 5590 states and 21248 transitions. [2021-08-12 18:52:04,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 21248 transitions. [2021-08-12 18:52:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:52:04,108 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:04,108 INFO L550 BasicCegarLoop]: trace histogram [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 18:52:04,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 18:52:04,309 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1554761067, now seen corresponding path program 2 times [2021-08-12 18:52:04,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:04,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578937432] [2021-08-12 18:52:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:04,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:04,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578937432] [2021-08-12 18:52:04,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578937432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:04,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684470659] [2021-08-12 18:52:04,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:04,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:04,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:04,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:04,429 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 16 treesize of output 12 [2021-08-12 18:52:04,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:04,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:52:04,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:04,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-08-12 18:52:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:04,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684470659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:04,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:04,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:52:04,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547296327] [2021-08-12 18:52:04,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:04,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:04,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:04,449 INFO L87 Difference]: Start difference. First operand 5590 states and 21248 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 18:52:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:05,584 INFO L93 Difference]: Finished difference Result 8393 states and 31534 transitions. [2021-08-12 18:52:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:52:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 27 [2021-08-12 18:52:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:05,604 INFO L225 Difference]: With dead ends: 8393 [2021-08-12 18:52:05,604 INFO L226 Difference]: Without dead ends: 5117 [2021-08-12 18:52:05,608 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-08-12 18:52:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4893. [2021-08-12 18:52:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 3.8068274734260017) internal successors, (18623), 4892 states have internal predecessors, (18623), 0 states have call successors, (0), 0 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 18:52:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 18623 transitions. [2021-08-12 18:52:05,960 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 18623 transitions. Word has length 27 [2021-08-12 18:52:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:05,960 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 18623 transitions. [2021-08-12 18:52:05,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 18:52:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 18623 transitions. [2021-08-12 18:52:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:52:05,968 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:05,968 INFO L550 BasicCegarLoop]: trace histogram [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 18:52:06,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 18:52:06,168 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1455495413, now seen corresponding path program 3 times [2021-08-12 18:52:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:06,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47610821] [2021-08-12 18:52:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:06,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:06,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47610821] [2021-08-12 18:52:06,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47610821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:06,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699671260] [2021-08-12 18:52:06,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:06,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:52:06,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:06,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:06,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:06,307 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 18:52:06,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:06,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:52:06,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:06,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-08-12 18:52:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 18:52:06,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699671260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:06,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:06,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-12 18:52:06,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736550604] [2021-08-12 18:52:06,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:52:06,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:06,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:52:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:06,349 INFO L87 Difference]: Start difference. First operand 4893 states and 18623 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 18:52:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:07,558 INFO L93 Difference]: Finished difference Result 7238 states and 27839 transitions. [2021-08-12 18:52:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:52:07,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 27 [2021-08-12 18:52:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:07,580 INFO L225 Difference]: With dead ends: 7238 [2021-08-12 18:52:07,580 INFO L226 Difference]: Without dead ends: 5208 [2021-08-12 18:52:07,583 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:52:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-08-12 18:52:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4755. [2021-08-12 18:52:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4755 states, 4754 states have (on average 3.8029028186790073) internal successors, (18079), 4754 states have internal predecessors, (18079), 0 states have call successors, (0), 0 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 18:52:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4755 states to 4755 states and 18079 transitions. [2021-08-12 18:52:07,935 INFO L78 Accepts]: Start accepts. Automaton has 4755 states and 18079 transitions. Word has length 27 [2021-08-12 18:52:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:07,935 INFO L482 AbstractCegarLoop]: Abstraction has 4755 states and 18079 transitions. [2021-08-12 18:52:07,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 18:52:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4755 states and 18079 transitions. [2021-08-12 18:52:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 18:52:07,943 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:07,943 INFO L550 BasicCegarLoop]: trace histogram [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 18:52:08,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 18:52:08,152 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash 733903001, now seen corresponding path program 4 times [2021-08-12 18:52:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:08,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062728789] [2021-08-12 18:52:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:08,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:08,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062728789] [2021-08-12 18:52:08,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062728789] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:08,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:08,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 18:52:08,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626737704] [2021-08-12 18:52:08,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 18:52:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 18:52:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:52:08,290 INFO L87 Difference]: Start difference. First operand 4755 states and 18079 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 18:52:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:09,194 INFO L93 Difference]: Finished difference Result 5029 states and 18886 transitions. [2021-08-12 18:52:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 18:52:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 18:52:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:09,216 INFO L225 Difference]: With dead ends: 5029 [2021-08-12 18:52:09,216 INFO L226 Difference]: Without dead ends: 4453 [2021-08-12 18:52:09,218 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2021-08-12 18:52:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4453. [2021-08-12 18:52:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 3.8313117699910153) internal successors, (17057), 4452 states have internal predecessors, (17057), 0 states have call successors, (0), 0 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 18:52:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 17057 transitions. [2021-08-12 18:52:09,582 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 17057 transitions. Word has length 27 [2021-08-12 18:52:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:09,582 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 17057 transitions. [2021-08-12 18:52:09,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 18:52:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 17057 transitions. [2021-08-12 18:52:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:52:09,589 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:09,589 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:09,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-12 18:52:09,589 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash -393228176, now seen corresponding path program 9 times [2021-08-12 18:52:09,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:09,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14025593] [2021-08-12 18:52:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:09,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14025593] [2021-08-12 18:52:09,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14025593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647052578] [2021-08-12 18:52:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:09,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:52:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:09,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 18:52:09,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647052578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:09,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:09,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:52:09,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368289912] [2021-08-12 18:52:09,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:52:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:09,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:52:09,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:52:09,780 INFO L87 Difference]: Start difference. First operand 4453 states and 17057 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:14,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:14,180 INFO L93 Difference]: Finished difference Result 18561 states and 69640 transitions. [2021-08-12 18:52:14,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 18:52:14,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:52:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:14,237 INFO L225 Difference]: With dead ends: 18561 [2021-08-12 18:52:14,238 INFO L226 Difference]: Without dead ends: 17714 [2021-08-12 18:52:14,243 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 18:52:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2021-08-12 18:52:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 11055. [2021-08-12 18:52:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 4.028586936855437) internal successors, (44532), 11054 states have internal predecessors, (44532), 0 states have call successors, (0), 0 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 18:52:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 44532 transitions. [2021-08-12 18:52:15,186 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 44532 transitions. Word has length 30 [2021-08-12 18:52:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:15,186 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 44532 transitions. [2021-08-12 18:52:15,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 44532 transitions. [2021-08-12 18:52:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:52:15,209 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:15,209 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:15,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:15,409 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1496580308, now seen corresponding path program 10 times [2021-08-12 18:52:15,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:15,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387892673] [2021-08-12 18:52:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:15,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:15,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387892673] [2021-08-12 18:52:15,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387892673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:15,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603879538] [2021-08-12 18:52:15,459 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 18:52:15,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:52:15,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:52:15,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:15,598 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 18:52:15,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:15,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:52:15,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:15,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-08-12 18:52:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:15,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603879538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:15,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:15,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:52:15,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167845815] [2021-08-12 18:52:15,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:52:15,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:52:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:52:15,628 INFO L87 Difference]: Start difference. First operand 11055 states and 44532 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:21,938 INFO L93 Difference]: Finished difference Result 23719 states and 91187 transitions. [2021-08-12 18:52:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 18:52:21,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:52:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:22,024 INFO L225 Difference]: With dead ends: 23719 [2021-08-12 18:52:22,024 INFO L226 Difference]: Without dead ends: 22853 [2021-08-12 18:52:22,032 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 18:52:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22853 states. [2021-08-12 18:52:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22853 to 15842. [2021-08-12 18:52:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 4.061738526608169) internal successors, (64342), 15841 states have internal predecessors, (64342), 0 states have call successors, (0), 0 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 18:52:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 64342 transitions. [2021-08-12 18:52:23,394 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 64342 transitions. Word has length 30 [2021-08-12 18:52:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:23,394 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 64342 transitions. [2021-08-12 18:52:23,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 64342 transitions. [2021-08-12 18:52:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:52:23,422 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:23,422 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:23,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 18:52:23,628 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:23,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1834270364, now seen corresponding path program 11 times [2021-08-12 18:52:23,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:23,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112049955] [2021-08-12 18:52:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:23,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:23,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112049955] [2021-08-12 18:52:23,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112049955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:23,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576084448] [2021-08-12 18:52:23,669 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:23,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:52:23,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:23,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576084448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:23,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:23,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-08-12 18:52:23,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691987067] [2021-08-12 18:52:23,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:52:23,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:52:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:23,758 INFO L87 Difference]: Start difference. First operand 15842 states and 64342 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 18:52:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:28,654 INFO L93 Difference]: Finished difference Result 24115 states and 96423 transitions. [2021-08-12 18:52:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:28,655 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 30 [2021-08-12 18:52:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:28,749 INFO L225 Difference]: With dead ends: 24115 [2021-08-12 18:52:28,749 INFO L226 Difference]: Without dead ends: 23752 [2021-08-12 18:52:28,756 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:52:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23752 states. [2021-08-12 18:52:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23752 to 16213. [2021-08-12 18:52:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16213 states, 16212 states have (on average 4.060880829015544) internal successors, (65835), 16212 states have internal predecessors, (65835), 0 states have call successors, (0), 0 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 18:52:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16213 states to 16213 states and 65835 transitions. [2021-08-12 18:52:30,154 INFO L78 Accepts]: Start accepts. Automaton has 16213 states and 65835 transitions. Word has length 30 [2021-08-12 18:52:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:30,155 INFO L482 AbstractCegarLoop]: Abstraction has 16213 states and 65835 transitions. [2021-08-12 18:52:30,155 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 18:52:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 16213 states and 65835 transitions. [2021-08-12 18:52:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:52:30,183 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:30,183 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:30,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-12 18:52:30,383 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1212389954, now seen corresponding path program 12 times [2021-08-12 18:52:30,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:30,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660714040] [2021-08-12 18:52:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:30,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:30,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660714040] [2021-08-12 18:52:30,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660714040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:30,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200094204] [2021-08-12 18:52:30,437 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:30,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:52:30,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:30,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:30,546 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 18:52:30,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200094204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:30,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:30,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 18:52:30,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497397494] [2021-08-12 18:52:30,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:52:30,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:52:30,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:52:30,547 INFO L87 Difference]: Start difference. First operand 16213 states and 65835 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 18:52:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:37,032 INFO L93 Difference]: Finished difference Result 31406 states and 124017 transitions. [2021-08-12 18:52:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:52:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:52:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:37,140 INFO L225 Difference]: With dead ends: 31406 [2021-08-12 18:52:37,141 INFO L226 Difference]: Without dead ends: 30782 [2021-08-12 18:52:37,149 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:52:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30782 states. [2021-08-12 18:52:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30782 to 23744. [2021-08-12 18:52:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23744 states, 23743 states have (on average 4.117634671271532) internal successors, (97765), 23743 states have internal predecessors, (97765), 0 states have call successors, (0), 0 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 18:52:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23744 states to 23744 states and 97765 transitions. [2021-08-12 18:52:39,196 INFO L78 Accepts]: Start accepts. Automaton has 23744 states and 97765 transitions. Word has length 30 [2021-08-12 18:52:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:39,196 INFO L482 AbstractCegarLoop]: Abstraction has 23744 states and 97765 transitions. [2021-08-12 18:52:39,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 18:52:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 23744 states and 97765 transitions. [2021-08-12 18:52:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:52:39,237 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:39,237 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:39,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:39,437 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash -977561994, now seen corresponding path program 13 times [2021-08-12 18:52:39,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:39,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076556505] [2021-08-12 18:52:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:39,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:39,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076556505] [2021-08-12 18:52:39,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076556505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:39,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287345985] [2021-08-12 18:52:39,475 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:52:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:39,600 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 18:52:39,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:52:39,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:52:39,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:52:39,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-08-12 18:52:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:39,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287345985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:39,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:39,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:52:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708995256] [2021-08-12 18:52:39,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:52:39,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:39,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:52:39,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:52:39,628 INFO L87 Difference]: Start difference. First operand 23744 states and 97765 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:47,513 INFO L93 Difference]: Finished difference Result 35449 states and 143262 transitions. [2021-08-12 18:52:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 18:52:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:52:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:47,635 INFO L225 Difference]: With dead ends: 35449 [2021-08-12 18:52:47,636 INFO L226 Difference]: Without dead ends: 34623 [2021-08-12 18:52:47,647 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:52:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34623 states. [2021-08-12 18:52:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34623 to 25637. [2021-08-12 18:52:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 4.109065376813856) internal successors, (105340), 25636 states have internal predecessors, (105340), 0 states have call successors, (0), 0 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 18:52:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 105340 transitions. [2021-08-12 18:52:49,879 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 105340 transitions. Word has length 30 [2021-08-12 18:52:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:49,879 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 105340 transitions. [2021-08-12 18:52:49,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 105340 transitions. [2021-08-12 18:52:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:52:49,923 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:49,923 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:50,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 18:52:50,124 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:50,124 INFO L82 PathProgramCache]: Analyzing trace with hash 986277488, now seen corresponding path program 14 times [2021-08-12 18:52:50,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:50,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412825070] [2021-08-12 18:52:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:50,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:50,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412825070] [2021-08-12 18:52:50,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412825070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:50,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414939735] [2021-08-12 18:52:50,163 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:50,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:50,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:52:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:50,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414939735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:50,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:50,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-12 18:52:50,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599442419] [2021-08-12 18:52:50,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:52:50,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:50,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:52:50,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:52:50,286 INFO L87 Difference]: Start difference. First operand 25637 states and 105340 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:01,009 INFO L93 Difference]: Finished difference Result 51533 states and 206824 transitions. [2021-08-12 18:53:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:53:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:53:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:01,201 INFO L225 Difference]: With dead ends: 51533 [2021-08-12 18:53:01,201 INFO L226 Difference]: Without dead ends: 50772 [2021-08-12 18:53:01,219 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:53:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50772 states. [2021-08-12 18:53:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50772 to 38308. [2021-08-12 18:53:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38307 states have (on average 4.208395332445767) internal successors, (161211), 38307 states have internal predecessors, (161211), 0 states have call successors, (0), 0 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 18:53:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 161211 transitions. [2021-08-12 18:53:04,633 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 161211 transitions. Word has length 30 [2021-08-12 18:53:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:04,634 INFO L482 AbstractCegarLoop]: Abstraction has 38308 states and 161211 transitions. [2021-08-12 18:53:04,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 161211 transitions. [2021-08-12 18:53:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:53:05,011 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:05,011 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:05,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:05,233 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:05,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1130060142, now seen corresponding path program 15 times [2021-08-12 18:53:05,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:05,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972753016] [2021-08-12 18:53:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:05,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:05,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972753016] [2021-08-12 18:53:05,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972753016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:05,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988691119] [2021-08-12 18:53:05,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:05,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:53:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:53:05,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:05,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988691119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:05,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:05,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-08-12 18:53:05,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32548393] [2021-08-12 18:53:05,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:05,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:05,602 INFO L87 Difference]: Start difference. First operand 38308 states and 161211 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:15,431 INFO L93 Difference]: Finished difference Result 46007 states and 186070 transitions. [2021-08-12 18:53:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:53:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:53:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:15,600 INFO L225 Difference]: With dead ends: 46007 [2021-08-12 18:53:15,600 INFO L226 Difference]: Without dead ends: 45550 [2021-08-12 18:53:15,614 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:53:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45550 states. [2021-08-12 18:53:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45550 to 38454. [2021-08-12 18:53:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38454 states, 38453 states have (on average 4.205341585832055) internal successors, (161708), 38453 states have internal predecessors, (161708), 0 states have call successors, (0), 0 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 18:53:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38454 states to 38454 states and 161708 transitions. [2021-08-12 18:53:19,025 INFO L78 Accepts]: Start accepts. Automaton has 38454 states and 161708 transitions. Word has length 30 [2021-08-12 18:53:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:19,025 INFO L482 AbstractCegarLoop]: Abstraction has 38454 states and 161708 transitions. [2021-08-12 18:53:19,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 38454 states and 161708 transitions. [2021-08-12 18:53:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:53:19,086 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:19,086 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:19,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 18:53:19,287 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:19,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:19,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1343876520, now seen corresponding path program 16 times [2021-08-12 18:53:19,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:19,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361865228] [2021-08-12 18:53:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:19,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:19,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361865228] [2021-08-12 18:53:19,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361865228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:19,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206506015] [2021-08-12 18:53:19,328 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:19,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:19,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:19,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:53:19,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:19,439 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 18:53:19,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:53:19,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:53:19,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:53:19,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-08-12 18:53:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:19,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206506015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:19,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:19,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-08-12 18:53:19,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285760571] [2021-08-12 18:53:19,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:53:19,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:19,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:53:19,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:53:19,466 INFO L87 Difference]: Start difference. First operand 38454 states and 161708 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:33,263 INFO L93 Difference]: Finished difference Result 55636 states and 224750 transitions. [2021-08-12 18:53:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 18:53:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:53:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:33,486 INFO L225 Difference]: With dead ends: 55636 [2021-08-12 18:53:33,486 INFO L226 Difference]: Without dead ends: 54596 [2021-08-12 18:53:33,504 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 599.2ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 18:53:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54596 states. [2021-08-12 18:53:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54596 to 41454. [2021-08-12 18:53:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41454 states, 41453 states have (on average 4.203965937326611) internal successors, (174267), 41453 states have internal predecessors, (174267), 0 states have call successors, (0), 0 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 18:53:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41454 states to 41454 states and 174267 transitions. [2021-08-12 18:53:37,484 INFO L78 Accepts]: Start accepts. Automaton has 41454 states and 174267 transitions. Word has length 30 [2021-08-12 18:53:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:37,484 INFO L482 AbstractCegarLoop]: Abstraction has 41454 states and 174267 transitions. [2021-08-12 18:53:37,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 41454 states and 174267 transitions. [2021-08-12 18:53:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:53:37,550 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:37,550 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 18:53:37,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 18:53:37,751 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:37,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1709456920, now seen corresponding path program 1 times [2021-08-12 18:53:37,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:37,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547420732] [2021-08-12 18:53:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:37,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:37,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547420732] [2021-08-12 18:53:37,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547420732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:37,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937725933] [2021-08-12 18:53:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 18:53:37,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:37,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937725933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:37,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:37,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-08-12 18:53:37,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588298569] [2021-08-12 18:53:37,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:53:37,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:53:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:53:37,927 INFO L87 Difference]: Start difference. First operand 41454 states and 174267 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:52,065 INFO L93 Difference]: Finished difference Result 77507 states and 315650 transitions. [2021-08-12 18:53:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 18:53:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:53:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:52,464 INFO L225 Difference]: With dead ends: 77507 [2021-08-12 18:53:52,464 INFO L226 Difference]: Without dead ends: 56506 [2021-08-12 18:53:52,496 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 18:53:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56506 states. [2021-08-12 18:53:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56506 to 42332. [2021-08-12 18:53:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42332 states, 42331 states have (on average 4.198270770829888) internal successors, (177717), 42331 states have internal predecessors, (177717), 0 states have call successors, (0), 0 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 18:53:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42332 states to 42332 states and 177717 transitions. [2021-08-12 18:53:56,794 INFO L78 Accepts]: Start accepts. Automaton has 42332 states and 177717 transitions. Word has length 30 [2021-08-12 18:53:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:56,795 INFO L482 AbstractCegarLoop]: Abstraction has 42332 states and 177717 transitions. [2021-08-12 18:53:56,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:56,795 INFO L276 IsEmpty]: Start isEmpty. Operand 42332 states and 177717 transitions. [2021-08-12 18:53:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:53:56,868 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:56,868 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:57,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 18:53:57,068 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 541122106, now seen corresponding path program 17 times [2021-08-12 18:53:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846916359] [2021-08-12 18:53:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:57,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:57,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846916359] [2021-08-12 18:53:57,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846916359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:57,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348511866] [2021-08-12 18:53:57,105 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:57,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:53:57,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:57,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:57,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:57,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348511866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:57,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:57,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-08-12 18:53:57,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047967948] [2021-08-12 18:53:57,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:53:57,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:53:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:53:57,194 INFO L87 Difference]: Start difference. First operand 42332 states and 177717 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:09,739 INFO L93 Difference]: Finished difference Result 52865 states and 213665 transitions. [2021-08-12 18:54:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:54:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:54:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:09,946 INFO L225 Difference]: With dead ends: 52865 [2021-08-12 18:54:09,947 INFO L226 Difference]: Without dead ends: 52640 [2021-08-12 18:54:09,963 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:54:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52640 states. [2021-08-12 18:54:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52640 to 42878. [2021-08-12 18:54:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.208503393427712) internal successors, (180448), 42877 states have internal predecessors, (180448), 0 states have call successors, (0), 0 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 18:54:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 180448 transitions. [2021-08-12 18:54:14,103 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 180448 transitions. Word has length 30 [2021-08-12 18:54:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:14,104 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 180448 transitions. [2021-08-12 18:54:14,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 180448 transitions. [2021-08-12 18:54:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:54:14,166 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:14,166 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:14,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-12 18:54:14,376 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:14,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1494154336, now seen corresponding path program 18 times [2021-08-12 18:54:14,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:14,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983144150] [2021-08-12 18:54:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:14,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:14,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983144150] [2021-08-12 18:54:14,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983144150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:14,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52573210] [2021-08-12 18:54:14,667 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:14,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:54:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:54:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:54:14,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52573210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:14,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:14,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-12 18:54:14,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991919085] [2021-08-12 18:54:14,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:54:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:54:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:54:14,795 INFO L87 Difference]: Start difference. First operand 42878 states and 180448 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:36,558 INFO L93 Difference]: Finished difference Result 94256 states and 387485 transitions. [2021-08-12 18:54:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:54:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:54:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:37,061 INFO L225 Difference]: With dead ends: 94256 [2021-08-12 18:54:37,061 INFO L226 Difference]: Without dead ends: 92826 [2021-08-12 18:54:37,089 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:54:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92826 states. [2021-08-12 18:54:44,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92826 to 70922. [2021-08-12 18:54:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70922 states, 70921 states have (on average 4.303647720703318) internal successors, (305219), 70921 states have internal predecessors, (305219), 0 states have call successors, (0), 0 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 18:54:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70922 states to 70922 states and 305219 transitions. [2021-08-12 18:54:45,035 INFO L78 Accepts]: Start accepts. Automaton has 70922 states and 305219 transitions. Word has length 30 [2021-08-12 18:54:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:45,035 INFO L482 AbstractCegarLoop]: Abstraction has 70922 states and 305219 transitions. [2021-08-12 18:54:45,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 70922 states and 305219 transitions. [2021-08-12 18:54:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:54:45,142 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:45,143 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:45,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:45,343 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1262024518, now seen corresponding path program 19 times [2021-08-12 18:54:45,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:45,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680902155] [2021-08-12 18:54:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:45,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:45,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680902155] [2021-08-12 18:54:45,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680902155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:45,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634244614] [2021-08-12 18:54:45,390 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 18:54:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:45,510 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 18:54:45,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 18:54:45,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 18:54:45,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 18:54:45,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-08-12 18:54:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:45,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634244614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:45,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:45,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:54:45,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593690578] [2021-08-12 18:54:45,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:54:45,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:45,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:54:45,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:54:45,537 INFO L87 Difference]: Start difference. First operand 70922 states and 305219 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:07,911 INFO L93 Difference]: Finished difference Result 92305 states and 384952 transitions. [2021-08-12 18:55:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 18:55:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:55:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:08,338 INFO L225 Difference]: With dead ends: 92305 [2021-08-12 18:55:08,338 INFO L226 Difference]: Without dead ends: 91128 [2021-08-12 18:55:08,366 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 18:55:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91128 states. [2021-08-12 18:55:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91128 to 75370. [2021-08-12 18:55:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75370 states, 75369 states have (on average 4.307619843702318) internal successors, (324661), 75369 states have internal predecessors, (324661), 0 states have call successors, (0), 0 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 18:55:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75370 states to 75370 states and 324661 transitions. [2021-08-12 18:55:16,275 INFO L78 Accepts]: Start accepts. Automaton has 75370 states and 324661 transitions. Word has length 30 [2021-08-12 18:55:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:16,276 INFO L482 AbstractCegarLoop]: Abstraction has 75370 states and 324661 transitions. [2021-08-12 18:55:16,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 75370 states and 324661 transitions. [2021-08-12 18:55:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:55:16,387 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:16,387 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:16,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-12 18:55:16,588 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1475840896, now seen corresponding path program 20 times [2021-08-12 18:55:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:16,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896933260] [2021-08-12 18:55:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:16,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:16,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896933260] [2021-08-12 18:55:16,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896933260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:16,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151863330] [2021-08-12 18:55:16,629 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:16,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:55:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:55:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:16,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151863330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:16,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:16,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-12 18:55:16,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679678671] [2021-08-12 18:55:16,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:55:16,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:55:16,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:55:16,740 INFO L87 Difference]: Start difference. First operand 75370 states and 324661 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 18:55:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:38,313 INFO L93 Difference]: Finished difference Result 98611 states and 418374 transitions. [2021-08-12 18:55:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:55:38,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 30 [2021-08-12 18:55:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:38,833 INFO L225 Difference]: With dead ends: 98611 [2021-08-12 18:55:38,833 INFO L226 Difference]: Without dead ends: 98068 [2021-08-12 18:55:38,862 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:55:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98068 states. [2021-08-12 18:55:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98068 to 90511. [2021-08-12 18:55:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90511 states, 90510 states have (on average 4.326869959120539) internal successors, (391625), 90510 states have internal predecessors, (391625), 0 states have call successors, (0), 0 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 18:55:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90511 states to 90511 states and 391625 transitions. [2021-08-12 18:55:47,889 INFO L78 Accepts]: Start accepts. Automaton has 90511 states and 391625 transitions. Word has length 30 [2021-08-12 18:55:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:47,889 INFO L482 AbstractCegarLoop]: Abstraction has 90511 states and 391625 transitions. [2021-08-12 18:55:47,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 18:55:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 90511 states and 391625 transitions. [2021-08-12 18:55:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:55:48,241 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:48,241 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 18:55:48,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:48,449 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash 476999490, now seen corresponding path program 2 times [2021-08-12 18:55:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:48,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508525100] [2021-08-12 18:55:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:48,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:48,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508525100] [2021-08-12 18:55:48,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508525100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:48,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926871978] [2021-08-12 18:55:48,489 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:48,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:55:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:55:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:48,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926871978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:48,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:48,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-12 18:55:48,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924025970] [2021-08-12 18:55:48,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:55:48,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:55:48,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:55:48,607 INFO L87 Difference]: Start difference. First operand 90511 states and 391625 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:10,972 INFO L93 Difference]: Finished difference Result 98750 states and 418455 transitions. [2021-08-12 18:56:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:56:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-12 18:56:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:11,551 INFO L225 Difference]: With dead ends: 98750 [2021-08-12 18:56:11,551 INFO L226 Difference]: Without dead ends: 98337 [2021-08-12 18:56:11,579 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:56:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98337 states. [2021-08-12 18:56:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98337 to 90305. [2021-08-12 18:56:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90305 states, 90304 states have (on average 4.329077338766832) internal successors, (390933), 90304 states have internal predecessors, (390933), 0 states have call successors, (0), 0 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 18:56:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90305 states to 90305 states and 390933 transitions. [2021-08-12 18:56:20,684 INFO L78 Accepts]: Start accepts. Automaton has 90305 states and 390933 transitions. Word has length 30 [2021-08-12 18:56:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:20,685 INFO L482 AbstractCegarLoop]: Abstraction has 90305 states and 390933 transitions. [2021-08-12 18:56:20,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 90305 states and 390933 transitions. [2021-08-12 18:56:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-12 18:56:20,827 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:20,827 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 18:56:21,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 18:56:21,028 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:21,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1372991872, now seen corresponding path program 3 times [2021-08-12 18:56:21,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:21,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427606837] [2021-08-12 18:56:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:21,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:21,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427606837] [2021-08-12 18:56:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427606837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:21,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458742718] [2021-08-12 18:56:21,081 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:21,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:56:21,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:56:21,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:21,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458742718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:21,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:21,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-08-12 18:56:21,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662236868] [2021-08-12 18:56:21,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:56:21,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:21,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:56:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:56:21,187 INFO L87 Difference]: Start difference. First operand 90305 states and 390933 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 18:56:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:44,972 INFO L93 Difference]: Finished difference Result 102346 states and 433346 transitions. [2021-08-12 18:56:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:56:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 30 [2021-08-12 18:56:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:45,540 INFO L225 Difference]: With dead ends: 102346 [2021-08-12 18:56:45,541 INFO L226 Difference]: Without dead ends: 101965 [2021-08-12 18:56:45,572 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:56:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101965 states.