/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-context-alt-Rdp.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:41:23,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:41:23,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:41:23,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:41:23,418 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 [2021-02-19 19:41:23,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:41:23,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:41:23,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:41:23,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:41:23,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:41:23,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:41:23,450 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:41:23,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:41:23,451 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:41:23,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:41:23,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:41:23,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:41:23,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:41:23,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:41:23,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:41:23,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:41:23,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:41:23,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:41:23,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:41:23,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:41:23,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:41:23,453 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:41:23,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:41:23,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:41:23,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:41:23,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:41:23,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:41:23,729 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:41:23,732 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:41:23,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-context-alt-Rdp.wvr.bpl [2021-02-19 19:41:23,733 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-context-alt-Rdp.wvr.bpl' [2021-02-19 19:41:23,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:41:23,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:41:23,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:41:23,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:41:23,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:41:23,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:41:23,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:41:23,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:41:23,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:41:23,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/1) ... [2021-02-19 19:41:23,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:41:23,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:41:23,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:41:23,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:41:23,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (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 [2021-02-19 19:41:23,949 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:41:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:41:23,949 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:41:23,949 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:41:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:41:23,949 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:41:23,950 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:41:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:41:23,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:41:23,950 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:41:24,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:41:24,092 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:41:24,093 INFO L202 PluginConnector]: Adding new model counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:41:24 BoogieIcfgContainer [2021-02-19 19:41:24,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:41:24,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:41:24,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:41:24,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:41:24,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:41:23" (1/2) ... [2021-02-19 19:41:24,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11188db8 and model type counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:41:24, skipping insertion in model container [2021-02-19 19:41:24,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:41:24" (2/2) ... [2021-02-19 19:41:24,098 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-2-context-alt-Rdp.wvr.bpl [2021-02-19 19:41:24,103 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:41:24,104 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:41:24,106 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:41:24,107 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:41:24,158 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 19:41:24,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 19:41:24,194 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:41:24,195 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:41:24,195 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:41:24,195 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:41:24,195 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:41:24,195 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:41:24,195 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:41:24,195 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:41:24,200 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-02-19 19:41:24,221 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 19:41:24,226 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:24,226 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:24,226 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:24,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1374225361, now seen corresponding path program 1 times [2021-02-19 19:41:24,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:24,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298194411] [2021-02-19 19:41:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298194411] [2021-02-19 19:41:24,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:41:24,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 19:41:24,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784258673] [2021-02-19 19:41:24,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:41:24,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:24,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:41:24,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 19:41:24,364 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-02-19 19:41:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:24,399 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-02-19 19:41:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:41:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2021-02-19 19:41:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:24,405 INFO L225 Difference]: With dead ends: 43 [2021-02-19 19:41:24,405 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 19:41:24,406 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:41:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 19:41:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-02-19 19:41:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-02-19 19:41:24,435 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-02-19 19:41:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:24,435 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-02-19 19:41:24,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-02-19 19:41:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-02-19 19:41:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:41:24,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:24,436 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:24,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:41:24,436 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash -821183635, now seen corresponding path program 1 times [2021-02-19 19:41:24,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:24,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713449493] [2021-02-19 19:41:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:41:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713449493] [2021-02-19 19:41:24,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:41:24,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:41:24,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618547421] [2021-02-19 19:41:24,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:41:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:41:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 19:41:24,461 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:24,481 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-02-19 19:41:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:41:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:41:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:24,483 INFO L225 Difference]: With dead ends: 50 [2021-02-19 19:41:24,483 INFO L226 Difference]: Without dead ends: 50 [2021-02-19 19:41:24,484 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:41:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-19 19:41:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-02-19 19:41:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-02-19 19:41:24,488 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-02-19 19:41:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:24,488 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-02-19 19:41:24,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-02-19 19:41:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:41:24,489 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:24,489 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:24,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:41:24,489 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash 193855083, now seen corresponding path program 1 times [2021-02-19 19:41:24,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:24,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29550998] [2021-02-19 19:41:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:24,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29550998] [2021-02-19 19:41:24,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053547935] [2021-02-19 19:41:24,714 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 [2021-02-19 19:41:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 19:41:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:25,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:25,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:41:25,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161686417] [2021-02-19 19:41:25,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:41:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:41:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:41:25,044 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:41:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:25,210 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-02-19 19:41:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:41:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-02-19 19:41:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:25,220 INFO L225 Difference]: With dead ends: 108 [2021-02-19 19:41:25,220 INFO L226 Difference]: Without dead ends: 77 [2021-02-19 19:41:25,221 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:41:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-19 19:41:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-02-19 19:41:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-02-19 19:41:25,226 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-02-19 19:41:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:25,226 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-02-19 19:41:25,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:41:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-02-19 19:41:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:41:25,227 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:25,227 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:25,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 19:41:25,460 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:25,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1243228915, now seen corresponding path program 2 times [2021-02-19 19:41:25,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:25,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605606815] [2021-02-19 19:41:25,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:25,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605606815] [2021-02-19 19:41:25,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907942871] [2021-02-19 19:41:25,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:25,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:41:25,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:25,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 19:41:25,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:25,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:25,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:41:25,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223001877] [2021-02-19 19:41:25,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:41:25,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:25,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:41:25,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:41:25,872 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:41:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:26,162 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-02-19 19:41:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:41:26,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-02-19 19:41:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:26,168 INFO L225 Difference]: With dead ends: 130 [2021-02-19 19:41:26,168 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 19:41:26,168 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:41:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 19:41:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-02-19 19:41:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-02-19 19:41:26,181 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-02-19 19:41:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:26,181 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-02-19 19:41:26,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:41:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-02-19 19:41:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:41:26,182 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:26,182 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:26,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:26,383 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1893297885, now seen corresponding path program 3 times [2021-02-19 19:41:26,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:26,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547548345] [2021-02-19 19:41:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:26,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547548345] [2021-02-19 19:41:26,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715467802] [2021-02-19 19:41:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:26,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:41:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 19:41:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:26,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:26,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:41:26,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308316985] [2021-02-19 19:41:26,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:41:26,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:26,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:41:26,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:41:26,743 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:41:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:26,926 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-02-19 19:41:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:41:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-02-19 19:41:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:26,927 INFO L225 Difference]: With dead ends: 90 [2021-02-19 19:41:26,927 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 19:41:26,927 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:41:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 19:41:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-02-19 19:41:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-02-19 19:41:26,930 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-02-19 19:41:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:26,931 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-02-19 19:41:26,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-02-19 19:41:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-02-19 19:41:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:26,931 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:26,931 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:27,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:27,142 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1215753897, now seen corresponding path program 4 times [2021-02-19 19:41:27,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:27,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158157753] [2021-02-19 19:41:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:27,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158157753] [2021-02-19 19:41:27,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123000782] [2021-02-19 19:41:27,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:41:27,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:41:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:27,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:27,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:27,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832992892] [2021-02-19 19:41:27,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:27,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:27,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:27,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:27,624 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:27,955 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-02-19 19:41:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:41:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:27,956 INFO L225 Difference]: With dead ends: 117 [2021-02-19 19:41:27,956 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 19:41:27,957 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:41:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 19:41:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-02-19 19:41:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-02-19 19:41:27,961 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-02-19 19:41:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:27,961 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-02-19 19:41:27,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-02-19 19:41:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:27,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:27,962 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:28,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:28,178 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2029839567, now seen corresponding path program 5 times [2021-02-19 19:41:28,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:28,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296061944] [2021-02-19 19:41:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:28,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296061944] [2021-02-19 19:41:28,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448254793] [2021-02-19 19:41:28,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:28,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:41:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:28,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:28,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:28,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729710833] [2021-02-19 19:41:28,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:28,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:28,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:28,599 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:28,919 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-02-19 19:41:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:41:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:28,921 INFO L225 Difference]: With dead ends: 133 [2021-02-19 19:41:28,921 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 19:41:28,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:41:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 19:41:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-02-19 19:41:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-02-19 19:41:28,929 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-02-19 19:41:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:28,930 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-02-19 19:41:28,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-02-19 19:41:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:28,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:28,934 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:29,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 19:41:29,151 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1379770597, now seen corresponding path program 6 times [2021-02-19 19:41:29,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:29,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725093990] [2021-02-19 19:41:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:29,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725093990] [2021-02-19 19:41:29,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092335301] [2021-02-19 19:41:29,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:29,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:41:29,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:29,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:29,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:29,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:29,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:29,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747360866] [2021-02-19 19:41:29,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:29,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:29,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:29,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:29,554 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:29,922 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-02-19 19:41:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:41:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:29,923 INFO L225 Difference]: With dead ends: 113 [2021-02-19 19:41:29,923 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 19:41:29,924 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:41:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 19:41:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-02-19 19:41:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-02-19 19:41:29,927 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-02-19 19:41:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:29,927 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-02-19 19:41:29,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-02-19 19:41:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:29,927 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:29,927 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:30,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:30,142 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1367486075, now seen corresponding path program 7 times [2021-02-19 19:41:30,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:30,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955597361] [2021-02-19 19:41:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:30,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955597361] [2021-02-19 19:41:30,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893072464] [2021-02-19 19:41:30,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:30,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:30,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:30,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:30,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4461403] [2021-02-19 19:41:30,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:30,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:30,484 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:30,815 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-02-19 19:41:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:41:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:30,816 INFO L225 Difference]: With dead ends: 176 [2021-02-19 19:41:30,816 INFO L226 Difference]: Without dead ends: 162 [2021-02-19 19:41:30,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:41:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-02-19 19:41:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-02-19 19:41:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-02-19 19:41:30,822 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-02-19 19:41:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:30,822 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-02-19 19:41:30,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-02-19 19:41:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:30,823 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:30,823 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:31,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:31,031 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2017555045, now seen corresponding path program 8 times [2021-02-19 19:41:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:31,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571068920] [2021-02-19 19:41:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:31,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571068920] [2021-02-19 19:41:31,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835133822] [2021-02-19 19:41:31,139 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 [2021-02-19 19:41:31,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:41:31,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:31,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:31,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:31,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:31,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:31,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802851834] [2021-02-19 19:41:31,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:31,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:31,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:31,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:31,372 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:31,694 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-02-19 19:41:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:41:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:31,695 INFO L225 Difference]: With dead ends: 163 [2021-02-19 19:41:31,695 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 19:41:31,696 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:41:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 19:41:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-02-19 19:41:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-02-19 19:41:31,698 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-02-19 19:41:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:31,698 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-02-19 19:41:31,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-02-19 19:41:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:31,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:31,699 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:31,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:41:31,906 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:31,906 INFO L82 PathProgramCache]: Analyzing trace with hash -43304757, now seen corresponding path program 9 times [2021-02-19 19:41:31,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:31,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404285130] [2021-02-19 19:41:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:32,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404285130] [2021-02-19 19:41:32,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982028863] [2021-02-19 19:41:32,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:32,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:41:32,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:32,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:32,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:32,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:32,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811897433] [2021-02-19 19:41:32,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:32,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:32,224 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:32,457 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-02-19 19:41:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:41:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:32,458 INFO L225 Difference]: With dead ends: 104 [2021-02-19 19:41:32,458 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 19:41:32,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:41:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 19:41:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-02-19 19:41:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-02-19 19:41:32,461 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-02-19 19:41:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:32,461 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-02-19 19:41:32,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-02-19 19:41:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:32,461 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:32,462 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:32,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:32,666 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:32,666 INFO L82 PathProgramCache]: Analyzing trace with hash -883380427, now seen corresponding path program 10 times [2021-02-19 19:41:32,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:32,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961293681] [2021-02-19 19:41:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:32,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961293681] [2021-02-19 19:41:32,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028338024] [2021-02-19 19:41:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:32,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:41:32,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:32,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:32,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:32,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724154510] [2021-02-19 19:41:32,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:32,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:32,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:32,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:32,969 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:33,447 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-02-19 19:41:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:41:33,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:33,448 INFO L225 Difference]: With dead ends: 171 [2021-02-19 19:41:33,448 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 19:41:33,448 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:41:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 19:41:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-02-19 19:41:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-02-19 19:41:33,451 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-02-19 19:41:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:33,451 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-02-19 19:41:33,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-02-19 19:41:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:33,451 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:33,451 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:33,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:33,666 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash -233311457, now seen corresponding path program 11 times [2021-02-19 19:41:33,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:33,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214531851] [2021-02-19 19:41:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214531851] [2021-02-19 19:41:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353734217] [2021-02-19 19:41:33,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:33,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:41:33,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:33,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:33,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:33,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:33,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921845642] [2021-02-19 19:41:33,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:33,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:33,959 INFO L87 Difference]: Start difference. First operand 77 states and 153 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:34,469 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-02-19 19:41:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:41:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:34,470 INFO L225 Difference]: With dead ends: 171 [2021-02-19 19:41:34,470 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 19:41:34,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:41:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 19:41:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-02-19 19:41:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-02-19 19:41:34,473 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-02-19 19:41:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:34,473 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-02-19 19:41:34,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-02-19 19:41:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:34,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:34,473 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:34,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 19:41:34,682 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:34,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2000796037, now seen corresponding path program 12 times [2021-02-19 19:41:34,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:34,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148688537] [2021-02-19 19:41:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:34,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148688537] [2021-02-19 19:41:34,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977929477] [2021-02-19 19:41:34,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:34,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:41:34,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:34,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:34,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:34,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879169081] [2021-02-19 19:41:34,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:34,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:34,971 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:35,403 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-02-19 19:41:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:41:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:35,404 INFO L225 Difference]: With dead ends: 139 [2021-02-19 19:41:35,405 INFO L226 Difference]: Without dead ends: 125 [2021-02-19 19:41:35,405 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:41:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-19 19:41:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-02-19 19:41:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-02-19 19:41:35,407 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-02-19 19:41:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:35,407 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-02-19 19:41:35,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-02-19 19:41:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:41:35,407 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:35,407 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:35,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 19:41:35,618 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1465566235, now seen corresponding path program 13 times [2021-02-19 19:41:35,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:35,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875888416] [2021-02-19 19:41:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:35,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875888416] [2021-02-19 19:41:35,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391127706] [2021-02-19 19:41:35,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:35,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:41:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:35,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:35,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:41:35,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516797323] [2021-02-19 19:41:35,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:41:35,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:35,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:41:35,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:41:35,932 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:36,221 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-02-19 19:41:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:41:36,222 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-02-19 19:41:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:36,222 INFO L225 Difference]: With dead ends: 124 [2021-02-19 19:41:36,222 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 19:41:36,224 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:41:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 19:41:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-02-19 19:41:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-02-19 19:41:36,226 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-02-19 19:41:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:36,226 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-02-19 19:41:36,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-02-19 19:41:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-02-19 19:41:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:36,227 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:36,227 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:36,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:41:36,428 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:36,428 INFO L82 PathProgramCache]: Analyzing trace with hash -286996633, now seen corresponding path program 14 times [2021-02-19 19:41:36,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:36,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132391180] [2021-02-19 19:41:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132391180] [2021-02-19 19:41:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708352447] [2021-02-19 19:41:36,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:41:36,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:41:36,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:36,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 19:41:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:36,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:36,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:36,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110220335] [2021-02-19 19:41:36,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:36,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:36,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:36,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:36,821 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:37,125 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-02-19 19:41:37,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:41:37,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:37,126 INFO L225 Difference]: With dead ends: 120 [2021-02-19 19:41:37,126 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 19:41:37,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:41:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 19:41:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-02-19 19:41:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-02-19 19:41:37,128 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-02-19 19:41:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:37,128 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-02-19 19:41:37,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-02-19 19:41:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:37,129 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:37,129 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:37,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:37,342 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -814263641, now seen corresponding path program 15 times [2021-02-19 19:41:37,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:37,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928436535] [2021-02-19 19:41:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:37,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928436535] [2021-02-19 19:41:37,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848421619] [2021-02-19 19:41:37,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:37,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:41:37,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:37,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:37,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:37,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:37,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:37,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265413327] [2021-02-19 19:41:37,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:37,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:37,718 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:38,632 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-02-19 19:41:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:41:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:38,633 INFO L225 Difference]: With dead ends: 225 [2021-02-19 19:41:38,634 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 19:41:38,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:41:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 19:41:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-02-19 19:41:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-02-19 19:41:38,636 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-02-19 19:41:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:38,637 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-02-19 19:41:38,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-02-19 19:41:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:38,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:38,637 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:38,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 19:41:38,846 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1683325649, now seen corresponding path program 16 times [2021-02-19 19:41:38,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:38,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172551028] [2021-02-19 19:41:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172551028] [2021-02-19 19:41:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536145526] [2021-02-19 19:41:39,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:39,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:41:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:39,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:39,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:39,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:39,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902840101] [2021-02-19 19:41:39,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:39,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:39,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:39,268 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:40,598 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-02-19 19:41:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 19:41:40,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:40,600 INFO L225 Difference]: With dead ends: 293 [2021-02-19 19:41:40,600 INFO L226 Difference]: Without dead ends: 254 [2021-02-19 19:41:40,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:41:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-02-19 19:41:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-02-19 19:41:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-02-19 19:41:40,603 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-02-19 19:41:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:40,603 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-02-19 19:41:40,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-02-19 19:41:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:40,604 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:40,604 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:40,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:41:40,814 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1346713787, now seen corresponding path program 17 times [2021-02-19 19:41:40,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:40,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481436372] [2021-02-19 19:41:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481436372] [2021-02-19 19:41:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847907082] [2021-02-19 19:41:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:41:41,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:41:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:41,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:41,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837535001] [2021-02-19 19:41:41,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:41,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:41,276 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:42,427 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-02-19 19:41:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:41:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:42,428 INFO L225 Difference]: With dead ends: 263 [2021-02-19 19:41:42,428 INFO L226 Difference]: Without dead ends: 236 [2021-02-19 19:41:42,429 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:41:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-19 19:41:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-02-19 19:41:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-02-19 19:41:42,431 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-02-19 19:41:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:42,432 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-02-19 19:41:42,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-02-19 19:41:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:42,432 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:42,432 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:42,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:42,646 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1812068237, now seen corresponding path program 18 times [2021-02-19 19:41:42,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:42,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740220440] [2021-02-19 19:41:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:42,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740220440] [2021-02-19 19:41:42,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431074647] [2021-02-19 19:41:42,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:42,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:41:42,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:42,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:43,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:43,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:43,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441399926] [2021-02-19 19:41:43,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:43,045 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:44,274 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-02-19 19:41:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:41:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:44,275 INFO L225 Difference]: With dead ends: 280 [2021-02-19 19:41:44,275 INFO L226 Difference]: Without dead ends: 256 [2021-02-19 19:41:44,276 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=551, Invalid=2871, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 19:41:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-02-19 19:41:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-02-19 19:41:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-02-19 19:41:44,279 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-02-19 19:41:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:44,279 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-02-19 19:41:44,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-02-19 19:41:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:44,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:44,279 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:44,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:44,480 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:44,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1161999267, now seen corresponding path program 19 times [2021-02-19 19:41:44,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:44,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886708535] [2021-02-19 19:41:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:44,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886708535] [2021-02-19 19:41:44,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052643628] [2021-02-19 19:41:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:44,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:44,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:44,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:44,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359115779] [2021-02-19 19:41:44,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:44,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:44,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:44,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:44,878 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:46,066 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-02-19 19:41:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:41:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:46,068 INFO L225 Difference]: With dead ends: 241 [2021-02-19 19:41:46,068 INFO L226 Difference]: Without dead ends: 220 [2021-02-19 19:41:46,068 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=544, Invalid=2762, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:41:46,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-19 19:41:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-02-19 19:41:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-02-19 19:41:46,071 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-02-19 19:41:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:46,071 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-02-19 19:41:46,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-02-19 19:41:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:46,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:46,072 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:46,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:46,272 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1028528647, now seen corresponding path program 20 times [2021-02-19 19:41:46,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:46,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685796213] [2021-02-19 19:41:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:46,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685796213] [2021-02-19 19:41:46,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039631291] [2021-02-19 19:41:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:46,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:41:46,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:46,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:46,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:46,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:46,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:46,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182123782] [2021-02-19 19:41:46,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:46,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:46,695 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:48,196 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-02-19 19:41:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:41:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:48,198 INFO L225 Difference]: With dead ends: 342 [2021-02-19 19:41:48,198 INFO L226 Difference]: Without dead ends: 300 [2021-02-19 19:41:48,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:41:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-02-19 19:41:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-02-19 19:41:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-02-19 19:41:48,202 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-02-19 19:41:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:48,202 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-02-19 19:41:48,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-02-19 19:41:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:48,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:48,202 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:48,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 19:41:48,412 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2001510789, now seen corresponding path program 21 times [2021-02-19 19:41:48,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:48,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609705288] [2021-02-19 19:41:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:48,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609705288] [2021-02-19 19:41:48,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786617390] [2021-02-19 19:41:48,589 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 [2021-02-19 19:41:48,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:41:48,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:41:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:48,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:48,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:48,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101534640] [2021-02-19 19:41:48,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:48,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:48,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:48,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:48,859 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:50,464 INFO L93 Difference]: Finished difference Result 342 states and 659 transitions. [2021-02-19 19:41:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:41:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:50,472 INFO L225 Difference]: With dead ends: 342 [2021-02-19 19:41:50,472 INFO L226 Difference]: Without dead ends: 312 [2021-02-19 19:41:50,473 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=593, Invalid=2947, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:41:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-02-19 19:41:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 150. [2021-02-19 19:41:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2550335570469797) internal successors, (336), 149 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 336 transitions. [2021-02-19 19:41:50,477 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 336 transitions. Word has length 23 [2021-02-19 19:41:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:50,477 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 336 transitions. [2021-02-19 19:41:50,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 336 transitions. [2021-02-19 19:41:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:50,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:50,477 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:50,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 19:41:50,686 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:50,686 INFO L82 PathProgramCache]: Analyzing trace with hash 586889323, now seen corresponding path program 22 times [2021-02-19 19:41:50,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:50,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558264382] [2021-02-19 19:41:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:50,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558264382] [2021-02-19 19:41:50,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728487545] [2021-02-19 19:41:50,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:50,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:41:50,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:50,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:50,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:51,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:51,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:51,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347411197] [2021-02-19 19:41:51,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:51,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:51,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:51,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:51,100 INFO L87 Difference]: Start difference. First operand 150 states and 336 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:52,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:52,237 INFO L93 Difference]: Finished difference Result 338 states and 691 transitions. [2021-02-19 19:41:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:41:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:52,238 INFO L225 Difference]: With dead ends: 338 [2021-02-19 19:41:52,238 INFO L226 Difference]: Without dead ends: 324 [2021-02-19 19:41:52,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:41:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-02-19 19:41:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 178. [2021-02-19 19:41:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2937853107344632) internal successors, (406), 177 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 406 transitions. [2021-02-19 19:41:52,242 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 406 transitions. Word has length 23 [2021-02-19 19:41:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:52,242 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 406 transitions. [2021-02-19 19:41:52,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 406 transitions. [2021-02-19 19:41:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:52,243 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:52,243 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:52,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:52,455 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash 423537527, now seen corresponding path program 23 times [2021-02-19 19:41:52,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:52,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307266598] [2021-02-19 19:41:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307266598] [2021-02-19 19:41:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538785917] [2021-02-19 19:41:52,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:52,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:41:52,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:52,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:52,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:52,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:52,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901825554] [2021-02-19 19:41:52,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:52,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:52,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:52,848 INFO L87 Difference]: Start difference. First operand 178 states and 406 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:54,079 INFO L93 Difference]: Finished difference Result 448 states and 939 transitions. [2021-02-19 19:41:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:41:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:54,081 INFO L225 Difference]: With dead ends: 448 [2021-02-19 19:41:54,081 INFO L226 Difference]: Without dead ends: 410 [2021-02-19 19:41:54,081 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:41:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-19 19:41:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 209. [2021-02-19 19:41:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3461538461538463) internal successors, (488), 208 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 488 transitions. [2021-02-19 19:41:54,085 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 488 transitions. Word has length 23 [2021-02-19 19:41:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:54,085 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 488 transitions. [2021-02-19 19:41:54,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 488 transitions. [2021-02-19 19:41:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:41:54,086 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:54,086 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:54,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 19:41:54,287 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1281899805, now seen corresponding path program 24 times [2021-02-19 19:41:54,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:54,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423415162] [2021-02-19 19:41:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:54,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423415162] [2021-02-19 19:41:54,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246728933] [2021-02-19 19:41:54,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:54,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:41:54,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:54,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:41:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:54,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:54,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 19:41:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106089627] [2021-02-19 19:41:54,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:41:54,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:41:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:41:54,666 INFO L87 Difference]: Start difference. First operand 209 states and 488 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:55,776 INFO L93 Difference]: Finished difference Result 425 states and 927 transitions. [2021-02-19 19:41:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:41:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-02-19 19:41:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:55,778 INFO L225 Difference]: With dead ends: 425 [2021-02-19 19:41:55,778 INFO L226 Difference]: Without dead ends: 411 [2021-02-19 19:41:55,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:41:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-19 19:41:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 225. [2021-02-19 19:41:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.375) internal successors, (532), 224 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 532 transitions. [2021-02-19 19:41:55,783 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 532 transitions. Word has length 23 [2021-02-19 19:41:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:55,783 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 532 transitions. [2021-02-19 19:41:55,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-02-19 19:41:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 532 transitions. [2021-02-19 19:41:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:41:55,783 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:55,783 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:55,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:55,997 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1051369015, now seen corresponding path program 25 times [2021-02-19 19:41:55,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:55,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607992222] [2021-02-19 19:41:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:56,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607992222] [2021-02-19 19:41:56,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777049880] [2021-02-19 19:41:56,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:41:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:56,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:41:56,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:56,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:56,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 19:41:56,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840582314] [2021-02-19 19:41:56,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:41:56,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:41:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:41:56,430 INFO L87 Difference]: Start difference. First operand 225 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:57,233 INFO L93 Difference]: Finished difference Result 478 states and 1023 transitions. [2021-02-19 19:41:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:41:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:41:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:57,235 INFO L225 Difference]: With dead ends: 478 [2021-02-19 19:41:57,235 INFO L226 Difference]: Without dead ends: 457 [2021-02-19 19:41:57,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:41:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-02-19 19:41:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 260. [2021-02-19 19:41:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.4208494208494207) internal successors, (627), 259 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 627 transitions. [2021-02-19 19:41:57,240 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 627 transitions. Word has length 25 [2021-02-19 19:41:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:57,240 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 627 transitions. [2021-02-19 19:41:57,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 627 transitions. [2021-02-19 19:41:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:41:57,241 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:57,241 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:57,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 19:41:57,454 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1701437985, now seen corresponding path program 26 times [2021-02-19 19:41:57,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:57,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445875794] [2021-02-19 19:41:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:57,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445875794] [2021-02-19 19:41:57,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550300538] [2021-02-19 19:41:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:57,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:41:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:57,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:41:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:57,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:57,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 19:41:57,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467431315] [2021-02-19 19:41:57,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:41:57,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:41:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:41:57,846 INFO L87 Difference]: Start difference. First operand 260 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:41:58,853 INFO L93 Difference]: Finished difference Result 487 states and 1030 transitions. [2021-02-19 19:41:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 19:41:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:41:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:41:58,854 INFO L225 Difference]: With dead ends: 487 [2021-02-19 19:41:58,854 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 19:41:58,855 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:41:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 19:41:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 260. [2021-02-19 19:41:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.4208494208494207) internal successors, (627), 259 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 627 transitions. [2021-02-19 19:41:58,860 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 627 transitions. Word has length 25 [2021-02-19 19:41:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:41:58,860 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 627 transitions. [2021-02-19 19:41:58,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:41:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 627 transitions. [2021-02-19 19:41:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:41:58,864 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:41:58,864 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:41:59,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:59,077 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:41:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:41:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash -359421817, now seen corresponding path program 27 times [2021-02-19 19:41:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:41:59,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474421468] [2021-02-19 19:41:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:41:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:41:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:59,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474421468] [2021-02-19 19:41:59,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244865679] [2021-02-19 19:41:59,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:41:59,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:41:59,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:41:59,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:41:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:41:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:41:59,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:41:59,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 19:41:59,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548504799] [2021-02-19 19:41:59,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:41:59,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:41:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:41:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:41:59,469 INFO L87 Difference]: Start difference. First operand 260 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:00,251 INFO L93 Difference]: Finished difference Result 352 states and 772 transitions. [2021-02-19 19:42:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:42:00,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:00,252 INFO L225 Difference]: With dead ends: 352 [2021-02-19 19:42:00,252 INFO L226 Difference]: Without dead ends: 331 [2021-02-19 19:42:00,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:42:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-02-19 19:42:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 262. [2021-02-19 19:42:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.413793103448276) internal successors, (630), 261 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 630 transitions. [2021-02-19 19:42:00,261 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 630 transitions. Word has length 25 [2021-02-19 19:42:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:00,261 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 630 transitions. [2021-02-19 19:42:00,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 630 transitions. [2021-02-19 19:42:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:00,261 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:00,261 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:00,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 19:42:00,476 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1746379497, now seen corresponding path program 28 times [2021-02-19 19:42:00,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:00,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588291200] [2021-02-19 19:42:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588291200] [2021-02-19 19:42:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100800013] [2021-02-19 19:42:00,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:00,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:00,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:00,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:00,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:00,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976627587] [2021-02-19 19:42:00,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:00,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:00,859 INFO L87 Difference]: Start difference. First operand 262 states and 630 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:02,166 INFO L93 Difference]: Finished difference Result 717 states and 1516 transitions. [2021-02-19 19:42:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:42:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:02,168 INFO L225 Difference]: With dead ends: 717 [2021-02-19 19:42:02,168 INFO L226 Difference]: Without dead ends: 676 [2021-02-19 19:42:02,169 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:42:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-02-19 19:42:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 377. [2021-02-19 19:42:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.5) internal successors, (940), 376 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 940 transitions. [2021-02-19 19:42:02,175 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 940 transitions. Word has length 25 [2021-02-19 19:42:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:02,175 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 940 transitions. [2021-02-19 19:42:02,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 940 transitions. [2021-02-19 19:42:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:02,176 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:02,176 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:02,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:02,391 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1898518829, now seen corresponding path program 29 times [2021-02-19 19:42:02,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:02,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816653569] [2021-02-19 19:42:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816653569] [2021-02-19 19:42:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839367039] [2021-02-19 19:42:02,507 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 [2021-02-19 19:42:02,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:42:02,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:02,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:02,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:02,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:02,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:02,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758726500] [2021-02-19 19:42:02,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:02,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:02,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:02,769 INFO L87 Difference]: Start difference. First operand 377 states and 940 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:04,129 INFO L93 Difference]: Finished difference Result 681 states and 1442 transitions. [2021-02-19 19:42:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:42:04,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:04,131 INFO L225 Difference]: With dead ends: 681 [2021-02-19 19:42:04,131 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 19:42:04,131 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:42:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 19:42:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 338. [2021-02-19 19:42:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.4391691394658754) internal successors, (822), 337 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 822 transitions. [2021-02-19 19:42:04,136 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 822 transitions. Word has length 25 [2021-02-19 19:42:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:04,137 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 822 transitions. [2021-02-19 19:42:04,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 822 transitions. [2021-02-19 19:42:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:04,137 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:04,137 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:04,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 19:42:04,352 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash 335588665, now seen corresponding path program 30 times [2021-02-19 19:42:04,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:04,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075343652] [2021-02-19 19:42:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:04,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075343652] [2021-02-19 19:42:04,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323213880] [2021-02-19 19:42:04,457 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) [2021-02-19 19:42:04,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:42:04,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:04,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:04,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:04,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351641150] [2021-02-19 19:42:04,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:04,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:04,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:04,729 INFO L87 Difference]: Start difference. First operand 338 states and 822 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:05,552 INFO L93 Difference]: Finished difference Result 462 states and 1027 transitions. [2021-02-19 19:42:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:42:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:05,553 INFO L225 Difference]: With dead ends: 462 [2021-02-19 19:42:05,553 INFO L226 Difference]: Without dead ends: 441 [2021-02-19 19:42:05,554 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:42:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-02-19 19:42:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 325. [2021-02-19 19:42:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.4382716049382718) internal successors, (790), 324 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:05,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 790 transitions. [2021-02-19 19:42:05,558 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 790 transitions. Word has length 25 [2021-02-19 19:42:05,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:05,558 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 790 transitions. [2021-02-19 19:42:05,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 790 transitions. [2021-02-19 19:42:05,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:05,559 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:05,559 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:05,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:05,770 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:05,770 INFO L82 PathProgramCache]: Analyzing trace with hash 733686965, now seen corresponding path program 31 times [2021-02-19 19:42:05,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:05,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063523097] [2021-02-19 19:42:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:05,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063523097] [2021-02-19 19:42:05,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152697968] [2021-02-19 19:42:05,885 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 [2021-02-19 19:42:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:05,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:06,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:06,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:06,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518829724] [2021-02-19 19:42:06,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:06,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:06,150 INFO L87 Difference]: Start difference. First operand 325 states and 790 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:07,712 INFO L93 Difference]: Finished difference Result 880 states and 1876 transitions. [2021-02-19 19:42:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 19:42:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:07,714 INFO L225 Difference]: With dead ends: 880 [2021-02-19 19:42:07,714 INFO L226 Difference]: Without dead ends: 836 [2021-02-19 19:42:07,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 19:42:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-02-19 19:42:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 447. [2021-02-19 19:42:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.5515695067264574) internal successors, (1138), 446 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1138 transitions. [2021-02-19 19:42:07,722 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1138 transitions. Word has length 25 [2021-02-19 19:42:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:07,722 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1138 transitions. [2021-02-19 19:42:07,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1138 transitions. [2021-02-19 19:42:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:07,723 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:07,723 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:07,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 19:42:07,934 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1383755935, now seen corresponding path program 32 times [2021-02-19 19:42:07,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:07,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877947753] [2021-02-19 19:42:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877947753] [2021-02-19 19:42:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831070724] [2021-02-19 19:42:08,046 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 [2021-02-19 19:42:08,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:08,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:08,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:08,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:08,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:08,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173786539] [2021-02-19 19:42:08,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:08,289 INFO L87 Difference]: Start difference. First operand 447 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:09,950 INFO L93 Difference]: Finished difference Result 844 states and 1797 transitions. [2021-02-19 19:42:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:42:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:09,953 INFO L225 Difference]: With dead ends: 844 [2021-02-19 19:42:09,953 INFO L226 Difference]: Without dead ends: 809 [2021-02-19 19:42:09,953 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 19:42:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-02-19 19:42:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 337. [2021-02-19 19:42:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.5) internal successors, (840), 336 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 840 transitions. [2021-02-19 19:42:09,960 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 840 transitions. Word has length 25 [2021-02-19 19:42:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:09,960 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 840 transitions. [2021-02-19 19:42:09,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 840 transitions. [2021-02-19 19:42:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:09,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:09,961 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:10,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 19:42:10,161 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:10,162 INFO L82 PathProgramCache]: Analyzing trace with hash -677103867, now seen corresponding path program 33 times [2021-02-19 19:42:10,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:10,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828338907] [2021-02-19 19:42:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:10,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828338907] [2021-02-19 19:42:10,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713831498] [2021-02-19 19:42:10,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:10,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:42:10,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:10,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:10,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:10,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:10,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:10,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974459703] [2021-02-19 19:42:10,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:10,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:10,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:10,514 INFO L87 Difference]: Start difference. First operand 337 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:11,615 INFO L93 Difference]: Finished difference Result 539 states and 1176 transitions. [2021-02-19 19:42:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 19:42:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:11,617 INFO L225 Difference]: With dead ends: 539 [2021-02-19 19:42:11,617 INFO L226 Difference]: Without dead ends: 518 [2021-02-19 19:42:11,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:42:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-02-19 19:42:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 336. [2021-02-19 19:42:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.5194029850746267) internal successors, (844), 335 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 844 transitions. [2021-02-19 19:42:11,622 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 844 transitions. Word has length 25 [2021-02-19 19:42:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:11,622 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 844 transitions. [2021-02-19 19:42:11,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 844 transitions. [2021-02-19 19:42:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:11,622 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:11,622 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:11,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 19:42:11,837 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1212333669, now seen corresponding path program 34 times [2021-02-19 19:42:11,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:11,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86732560] [2021-02-19 19:42:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:11,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86732560] [2021-02-19 19:42:11,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809751991] [2021-02-19 19:42:11,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:11,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:11,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:11,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:12,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:12,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:12,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033949828] [2021-02-19 19:42:12,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:12,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:12,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:12,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:12,206 INFO L87 Difference]: Start difference. First operand 336 states and 844 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:13,085 INFO L93 Difference]: Finished difference Result 477 states and 1063 transitions. [2021-02-19 19:42:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:42:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:13,087 INFO L225 Difference]: With dead ends: 477 [2021-02-19 19:42:13,087 INFO L226 Difference]: Without dead ends: 424 [2021-02-19 19:42:13,087 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:42:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-02-19 19:42:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 329. [2021-02-19 19:42:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.3780487804878048) internal successors, (780), 328 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 780 transitions. [2021-02-19 19:42:13,091 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 780 transitions. Word has length 25 [2021-02-19 19:42:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:13,091 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 780 transitions. [2021-02-19 19:42:13,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 780 transitions. [2021-02-19 19:42:13,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:13,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:13,092 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:13,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 19:42:13,305 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash 947305215, now seen corresponding path program 35 times [2021-02-19 19:42:13,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:13,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112028366] [2021-02-19 19:42:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:13,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112028366] [2021-02-19 19:42:13,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344008036] [2021-02-19 19:42:13,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:13,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:42:13,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:13,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:13,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:13,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:13,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-02-19 19:42:13,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854403571] [2021-02-19 19:42:13,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:13,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:13,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:13,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:13,828 INFO L87 Difference]: Start difference. First operand 329 states and 780 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-02-19 19:42:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:16,315 INFO L93 Difference]: Finished difference Result 585 states and 1283 transitions. [2021-02-19 19:42:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 19:42:16,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-02-19 19:42:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:16,317 INFO L225 Difference]: With dead ends: 585 [2021-02-19 19:42:16,317 INFO L226 Difference]: Without dead ends: 571 [2021-02-19 19:42:16,318 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:42:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-02-19 19:42:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 357. [2021-02-19 19:42:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.3820224719101124) internal successors, (848), 356 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 848 transitions. [2021-02-19 19:42:16,322 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 848 transitions. Word has length 25 [2021-02-19 19:42:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:16,323 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 848 transitions. [2021-02-19 19:42:16,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-02-19 19:42:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 848 transitions. [2021-02-19 19:42:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:16,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:16,323 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:16,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 19:42:16,524 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1198865545, now seen corresponding path program 36 times [2021-02-19 19:42:16,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:16,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399498463] [2021-02-19 19:42:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:16,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399498463] [2021-02-19 19:42:16,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132796729] [2021-02-19 19:42:16,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:16,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:42:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:16,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:16,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:16,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 19:42:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187854651] [2021-02-19 19:42:16,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:42:16,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:42:16,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:42:16,910 INFO L87 Difference]: Start difference. First operand 357 states and 848 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:17,876 INFO L93 Difference]: Finished difference Result 661 states and 1415 transitions. [2021-02-19 19:42:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:42:17,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:17,878 INFO L225 Difference]: With dead ends: 661 [2021-02-19 19:42:17,878 INFO L226 Difference]: Without dead ends: 588 [2021-02-19 19:42:17,878 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:42:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-02-19 19:42:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 415. [2021-02-19 19:42:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.314009661835749) internal successors, (958), 414 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 958 transitions. [2021-02-19 19:42:17,884 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 958 transitions. Word has length 25 [2021-02-19 19:42:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:17,884 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 958 transitions. [2021-02-19 19:42:17,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 958 transitions. [2021-02-19 19:42:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:17,885 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:17,885 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:18,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 19:42:18,098 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash -548796575, now seen corresponding path program 37 times [2021-02-19 19:42:18,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:18,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377523195] [2021-02-19 19:42:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:18,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377523195] [2021-02-19 19:42:18,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294360689] [2021-02-19 19:42:18,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:18,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:18,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:18,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 19:42:18,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130683512] [2021-02-19 19:42:18,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:42:18,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:18,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:42:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:42:18,513 INFO L87 Difference]: Start difference. First operand 415 states and 958 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:19,571 INFO L93 Difference]: Finished difference Result 646 states and 1353 transitions. [2021-02-19 19:42:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:42:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:19,573 INFO L225 Difference]: With dead ends: 646 [2021-02-19 19:42:19,573 INFO L226 Difference]: Without dead ends: 625 [2021-02-19 19:42:19,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:42:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-02-19 19:42:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 416. [2021-02-19 19:42:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.3180722891566266) internal successors, (962), 415 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 962 transitions. [2021-02-19 19:42:19,579 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 962 transitions. Word has length 25 [2021-02-19 19:42:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:19,579 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 962 transitions. [2021-02-19 19:42:19,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 962 transitions. [2021-02-19 19:42:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:19,580 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:19,580 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:19,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 19:42:19,794 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:19,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1685310919, now seen corresponding path program 38 times [2021-02-19 19:42:19,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:19,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085272477] [2021-02-19 19:42:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:19,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085272477] [2021-02-19 19:42:19,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87709513] [2021-02-19 19:42:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:19,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:19,940 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:19,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:20,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:20,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 19:42:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847889892] [2021-02-19 19:42:20,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:42:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:20,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:42:20,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:42:20,185 INFO L87 Difference]: Start difference. First operand 416 states and 962 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:20,902 INFO L93 Difference]: Finished difference Result 531 states and 1157 transitions. [2021-02-19 19:42:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:42:20,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:20,904 INFO L225 Difference]: With dead ends: 531 [2021-02-19 19:42:20,904 INFO L226 Difference]: Without dead ends: 517 [2021-02-19 19:42:20,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:42:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-02-19 19:42:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 418. [2021-02-19 19:42:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.3141486810551557) internal successors, (965), 417 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 965 transitions. [2021-02-19 19:42:20,909 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 965 transitions. Word has length 25 [2021-02-19 19:42:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:20,909 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 965 transitions. [2021-02-19 19:42:20,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 965 transitions. [2021-02-19 19:42:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:20,910 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:20,910 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:21,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:21,124 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2083409219, now seen corresponding path program 39 times [2021-02-19 19:42:21,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:21,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836754516] [2021-02-19 19:42:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836754516] [2021-02-19 19:42:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136591096] [2021-02-19 19:42:21,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:21,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:42:21,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:21,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:21,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:21,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:21,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097694866] [2021-02-19 19:42:21,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:21,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:21,489 INFO L87 Difference]: Start difference. First operand 418 states and 965 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:22,695 INFO L93 Difference]: Finished difference Result 579 states and 1222 transitions. [2021-02-19 19:42:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:42:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:22,697 INFO L225 Difference]: With dead ends: 579 [2021-02-19 19:42:22,697 INFO L226 Difference]: Without dead ends: 542 [2021-02-19 19:42:22,697 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=536, Invalid=3370, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:42:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-02-19 19:42:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 384. [2021-02-19 19:42:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.3159268929503916) internal successors, (887), 383 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 887 transitions. [2021-02-19 19:42:22,702 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 887 transitions. Word has length 25 [2021-02-19 19:42:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:22,702 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 887 transitions. [2021-02-19 19:42:22,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 887 transitions. [2021-02-19 19:42:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:22,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:22,703 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:22,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:22,917 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1561489107, now seen corresponding path program 40 times [2021-02-19 19:42:22,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:22,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824861136] [2021-02-19 19:42:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:23,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824861136] [2021-02-19 19:42:23,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323444917] [2021-02-19 19:42:23,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:23,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:23,048 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:23,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:23,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:23,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863941344] [2021-02-19 19:42:23,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:23,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:23,282 INFO L87 Difference]: Start difference. First operand 384 states and 887 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:24,567 INFO L93 Difference]: Finished difference Result 535 states and 1127 transitions. [2021-02-19 19:42:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:42:24,567 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:24,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:24,569 INFO L225 Difference]: With dead ends: 535 [2021-02-19 19:42:24,569 INFO L226 Difference]: Without dead ends: 505 [2021-02-19 19:42:24,569 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=585, Invalid=3705, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:42:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-02-19 19:42:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 323. [2021-02-19 19:42:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.329192546583851) internal successors, (750), 322 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 750 transitions. [2021-02-19 19:42:24,573 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 750 transitions. Word has length 25 [2021-02-19 19:42:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:24,573 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 750 transitions. [2021-02-19 19:42:24,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 750 transitions. [2021-02-19 19:42:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:24,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:24,574 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:24,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:24,788 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash 672618387, now seen corresponding path program 41 times [2021-02-19 19:42:24,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:24,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287827899] [2021-02-19 19:42:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:24,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287827899] [2021-02-19 19:42:24,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139699027] [2021-02-19 19:42:24,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:24,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:42:24,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:24,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:42:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:25,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:25,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:25,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335222873] [2021-02-19 19:42:25,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:25,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:25,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:25,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:25,246 INFO L87 Difference]: Start difference. First operand 323 states and 750 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:26,320 INFO L93 Difference]: Finished difference Result 466 states and 985 transitions. [2021-02-19 19:42:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:42:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:26,322 INFO L225 Difference]: With dead ends: 466 [2021-02-19 19:42:26,322 INFO L226 Difference]: Without dead ends: 445 [2021-02-19 19:42:26,323 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:42:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-02-19 19:42:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 322. [2021-02-19 19:42:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.3302180685358254) internal successors, (748), 321 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 748 transitions. [2021-02-19 19:42:26,326 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 748 transitions. Word has length 25 [2021-02-19 19:42:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:26,327 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 748 transitions. [2021-02-19 19:42:26,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 748 transitions. [2021-02-19 19:42:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:26,327 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:26,327 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:26,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 19:42:26,534 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash 137388585, now seen corresponding path program 42 times [2021-02-19 19:42:26,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:26,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787218625] [2021-02-19 19:42:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:26,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787218625] [2021-02-19 19:42:26,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595909838] [2021-02-19 19:42:26,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:26,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 19:42:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:26,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:26,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:26,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:26,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:26,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380544420] [2021-02-19 19:42:26,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:26,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:26,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:26,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:26,900 INFO L87 Difference]: Start difference. First operand 322 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:27,589 INFO L93 Difference]: Finished difference Result 429 states and 928 transitions. [2021-02-19 19:42:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:42:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:27,590 INFO L225 Difference]: With dead ends: 429 [2021-02-19 19:42:27,590 INFO L226 Difference]: Without dead ends: 376 [2021-02-19 19:42:27,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:42:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-02-19 19:42:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-02-19 19:42:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.306709265175719) internal successors, (722), 313 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 722 transitions. [2021-02-19 19:42:27,594 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 722 transitions. Word has length 25 [2021-02-19 19:42:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:27,594 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 722 transitions. [2021-02-19 19:42:27,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 722 transitions. [2021-02-19 19:42:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:27,594 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:27,595 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:27,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:27,809 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1450082559, now seen corresponding path program 43 times [2021-02-19 19:42:27,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:27,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602636551] [2021-02-19 19:42:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:27,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602636551] [2021-02-19 19:42:27,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458496606] [2021-02-19 19:42:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:28,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 19:42:28,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:28,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:28,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-02-19 19:42:28,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433725011] [2021-02-19 19:42:28,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:28,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:28,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:28,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:28,307 INFO L87 Difference]: Start difference. First operand 314 states and 722 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-02-19 19:42:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:30,668 INFO L93 Difference]: Finished difference Result 480 states and 1038 transitions. [2021-02-19 19:42:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 19:42:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-02-19 19:42:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:30,670 INFO L225 Difference]: With dead ends: 480 [2021-02-19 19:42:30,670 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 19:42:30,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 19:42:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 19:42:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 316. [2021-02-19 19:42:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.3079365079365077) internal successors, (727), 315 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 727 transitions. [2021-02-19 19:42:30,674 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 727 transitions. Word has length 25 [2021-02-19 19:42:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:30,674 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 727 transitions. [2021-02-19 19:42:30,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-02-19 19:42:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 727 transitions. [2021-02-19 19:42:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:30,675 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:30,675 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:30,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 19:42:30,875 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash 774240483, now seen corresponding path program 44 times [2021-02-19 19:42:30,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:30,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443151091] [2021-02-19 19:42:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:31,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443151091] [2021-02-19 19:42:31,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891298311] [2021-02-19 19:42:31,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:31,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:31,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:31,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:31,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:31,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:31,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565528374] [2021-02-19 19:42:31,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:31,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:31,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:31,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:31,422 INFO L87 Difference]: Start difference. First operand 316 states and 727 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:32,685 INFO L93 Difference]: Finished difference Result 578 states and 1234 transitions. [2021-02-19 19:42:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 19:42:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:32,687 INFO L225 Difference]: With dead ends: 578 [2021-02-19 19:42:32,687 INFO L226 Difference]: Without dead ends: 529 [2021-02-19 19:42:32,687 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=557, Invalid=3603, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 19:42:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-02-19 19:42:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 389. [2021-02-19 19:42:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.36340206185567) internal successors, (917), 388 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 917 transitions. [2021-02-19 19:42:32,692 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 917 transitions. Word has length 27 [2021-02-19 19:42:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:32,692 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 917 transitions. [2021-02-19 19:42:32,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 917 transitions. [2021-02-19 19:42:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:32,693 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:32,693 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:32,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 19:42:32,906 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1170693781, now seen corresponding path program 45 times [2021-02-19 19:42:32,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:32,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809777159] [2021-02-19 19:42:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:33,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809777159] [2021-02-19 19:42:33,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392387698] [2021-02-19 19:42:33,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:33,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:42:33,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:33,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:33,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:33,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:33,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:33,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111056696] [2021-02-19 19:42:33,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:33,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:33,394 INFO L87 Difference]: Start difference. First operand 389 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:34,838 INFO L93 Difference]: Finished difference Result 602 states and 1279 transitions. [2021-02-19 19:42:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:42:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:34,840 INFO L225 Difference]: With dead ends: 602 [2021-02-19 19:42:34,840 INFO L226 Difference]: Without dead ends: 564 [2021-02-19 19:42:34,841 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=641, Invalid=4189, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:42:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-02-19 19:42:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 392. [2021-02-19 19:42:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.360613810741688) internal successors, (923), 391 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 923 transitions. [2021-02-19 19:42:34,846 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 923 transitions. Word has length 27 [2021-02-19 19:42:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:34,846 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 923 transitions. [2021-02-19 19:42:34,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 923 transitions. [2021-02-19 19:42:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:34,847 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:34,847 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:35,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:35,055 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:35,056 INFO L82 PathProgramCache]: Analyzing trace with hash -338269265, now seen corresponding path program 46 times [2021-02-19 19:42:35,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:35,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229369055] [2021-02-19 19:42:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:35,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229369055] [2021-02-19 19:42:35,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809309307] [2021-02-19 19:42:35,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:35,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:35,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:35,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:35,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:35,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:35,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468838816] [2021-02-19 19:42:35,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:35,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:35,594 INFO L87 Difference]: Start difference. First operand 392 states and 923 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:37,353 INFO L93 Difference]: Finished difference Result 695 states and 1437 transitions. [2021-02-19 19:42:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 19:42:37,354 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:37,355 INFO L225 Difference]: With dead ends: 695 [2021-02-19 19:42:37,355 INFO L226 Difference]: Without dead ends: 656 [2021-02-19 19:42:37,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=744, Invalid=4806, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 19:42:37,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-02-19 19:42:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 398. [2021-02-19 19:42:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.367758186397985) internal successors, (940), 397 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 940 transitions. [2021-02-19 19:42:37,361 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 940 transitions. Word has length 27 [2021-02-19 19:42:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:37,361 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 940 transitions. [2021-02-19 19:42:37,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 940 transitions. [2021-02-19 19:42:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:37,362 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:37,362 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:37,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-02-19 19:42:37,562 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:37,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1603197125, now seen corresponding path program 47 times [2021-02-19 19:42:37,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:37,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890569840] [2021-02-19 19:42:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:37,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890569840] [2021-02-19 19:42:37,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518931301] [2021-02-19 19:42:37,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:37,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:42:37,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:37,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:37,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:38,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:38,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:38,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85302462] [2021-02-19 19:42:38,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:38,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:38,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:38,129 INFO L87 Difference]: Start difference. First operand 398 states and 940 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:39,727 INFO L93 Difference]: Finished difference Result 650 states and 1350 transitions. [2021-02-19 19:42:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:42:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:39,729 INFO L225 Difference]: With dead ends: 650 [2021-02-19 19:42:39,729 INFO L226 Difference]: Without dead ends: 623 [2021-02-19 19:42:39,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=692, Invalid=4138, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:42:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-02-19 19:42:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 399. [2021-02-19 19:42:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.3668341708542715) internal successors, (942), 398 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 942 transitions. [2021-02-19 19:42:39,735 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 942 transitions. Word has length 27 [2021-02-19 19:42:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:39,735 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 942 transitions. [2021-02-19 19:42:39,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 942 transitions. [2021-02-19 19:42:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:39,736 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:39,736 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:39,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:39,942 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash -467011853, now seen corresponding path program 48 times [2021-02-19 19:42:39,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:39,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436771365] [2021-02-19 19:42:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:40,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436771365] [2021-02-19 19:42:40,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881584654] [2021-02-19 19:42:40,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:40,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:42:40,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:40,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:40,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:40,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:40,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772105421] [2021-02-19 19:42:40,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:40,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:40,481 INFO L87 Difference]: Start difference. First operand 399 states and 942 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:42,119 INFO L93 Difference]: Finished difference Result 671 states and 1386 transitions. [2021-02-19 19:42:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 19:42:42,119 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:42,121 INFO L225 Difference]: With dead ends: 671 [2021-02-19 19:42:42,121 INFO L226 Difference]: Without dead ends: 647 [2021-02-19 19:42:42,122 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 19:42:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-02-19 19:42:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 402. [2021-02-19 19:42:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.369077306733167) internal successors, (950), 401 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 950 transitions. [2021-02-19 19:42:42,127 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 950 transitions. Word has length 27 [2021-02-19 19:42:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:42,127 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 950 transitions. [2021-02-19 19:42:42,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 950 transitions. [2021-02-19 19:42:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:42,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:42,128 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:42,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:42,341 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 183057117, now seen corresponding path program 49 times [2021-02-19 19:42:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:42,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101727444] [2021-02-19 19:42:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101727444] [2021-02-19 19:42:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823762322] [2021-02-19 19:42:42,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:42,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:42,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:42,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:42,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407296060] [2021-02-19 19:42:42,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:42,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:42,820 INFO L87 Difference]: Start difference. First operand 402 states and 950 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:44,571 INFO L93 Difference]: Finished difference Result 699 states and 1488 transitions. [2021-02-19 19:42:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:42:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:44,574 INFO L225 Difference]: With dead ends: 699 [2021-02-19 19:42:44,574 INFO L226 Difference]: Without dead ends: 676 [2021-02-19 19:42:44,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=873, Invalid=4827, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:42:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-02-19 19:42:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 422. [2021-02-19 19:42:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.36104513064133) internal successors, (994), 421 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 994 transitions. [2021-02-19 19:42:44,580 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 994 transitions. Word has length 27 [2021-02-19 19:42:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:44,580 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 994 transitions. [2021-02-19 19:42:44,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 994 transitions. [2021-02-19 19:42:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:44,580 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:44,580 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:44,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 19:42:44,781 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash 125654709, now seen corresponding path program 50 times [2021-02-19 19:42:44,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:44,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310366842] [2021-02-19 19:42:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:44,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310366842] [2021-02-19 19:42:44,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77893252] [2021-02-19 19:42:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:44,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:44,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:44,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:45,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:45,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:45,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524550727] [2021-02-19 19:42:45,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:45,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:45,292 INFO L87 Difference]: Start difference. First operand 422 states and 994 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:47,569 INFO L93 Difference]: Finished difference Result 792 states and 1672 transitions. [2021-02-19 19:42:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:42:47,570 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:47,571 INFO L225 Difference]: With dead ends: 792 [2021-02-19 19:42:47,571 INFO L226 Difference]: Without dead ends: 750 [2021-02-19 19:42:47,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=838, Invalid=5642, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 19:42:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-02-19 19:42:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 482. [2021-02-19 19:42:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.3866943866943866) internal successors, (1148), 481 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1148 transitions. [2021-02-19 19:42:47,578 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1148 transitions. Word has length 27 [2021-02-19 19:42:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:47,578 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1148 transitions. [2021-02-19 19:42:47,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1148 transitions. [2021-02-19 19:42:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:47,579 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:47,579 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:47,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:47,786 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1139273151, now seen corresponding path program 51 times [2021-02-19 19:42:47,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:47,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157857185] [2021-02-19 19:42:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:47,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157857185] [2021-02-19 19:42:47,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968292119] [2021-02-19 19:42:47,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:47,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:42:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:47,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:42:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:48,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:48,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:48,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100867410] [2021-02-19 19:42:48,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:48,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:48,291 INFO L87 Difference]: Start difference. First operand 482 states and 1148 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:50,297 INFO L93 Difference]: Finished difference Result 763 states and 1624 transitions. [2021-02-19 19:42:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 19:42:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:50,299 INFO L225 Difference]: With dead ends: 763 [2021-02-19 19:42:50,299 INFO L226 Difference]: Without dead ends: 736 [2021-02-19 19:42:50,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=794, Invalid=4906, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:42:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-02-19 19:42:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 480. [2021-02-19 19:42:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-02-19 19:42:50,305 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 27 [2021-02-19 19:42:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:50,305 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-02-19 19:42:50,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-02-19 19:42:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:50,306 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:50,306 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:50,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 19:42:50,514 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1091003709, now seen corresponding path program 52 times [2021-02-19 19:42:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:50,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501927475] [2021-02-19 19:42:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501927475] [2021-02-19 19:42:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127076800] [2021-02-19 19:42:50,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:50,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:50,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:50,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:50,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:51,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:51,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:42:51,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823585190] [2021-02-19 19:42:51,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:51,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:51,041 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:52,819 INFO L93 Difference]: Finished difference Result 760 states and 1660 transitions. [2021-02-19 19:42:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:42:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:52,821 INFO L225 Difference]: With dead ends: 760 [2021-02-19 19:42:52,821 INFO L226 Difference]: Without dead ends: 736 [2021-02-19 19:42:52,821 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=730, Invalid=3826, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:42:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-02-19 19:42:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 506. [2021-02-19 19:42:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.37029702970297) internal successors, (1197), 505 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1197 transitions. [2021-02-19 19:42:52,827 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1197 transitions. Word has length 27 [2021-02-19 19:42:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:52,827 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1197 transitions. [2021-02-19 19:42:52,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1197 transitions. [2021-02-19 19:42:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:52,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:52,828 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:53,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 19:42:53,028 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash -135453089, now seen corresponding path program 53 times [2021-02-19 19:42:53,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:53,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078094873] [2021-02-19 19:42:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:53,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078094873] [2021-02-19 19:42:53,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719320412] [2021-02-19 19:42:53,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:53,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:42:53,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:53,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:53,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:53,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 19:42:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569465360] [2021-02-19 19:42:53,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:42:53,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:42:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:42:53,476 INFO L87 Difference]: Start difference. First operand 506 states and 1197 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:54,893 INFO L93 Difference]: Finished difference Result 717 states and 1578 transitions. [2021-02-19 19:42:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 19:42:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:54,894 INFO L225 Difference]: With dead ends: 717 [2021-02-19 19:42:54,894 INFO L226 Difference]: Without dead ends: 692 [2021-02-19 19:42:54,895 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:42:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-02-19 19:42:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 441. [2021-02-19 19:42:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.3136363636363635) internal successors, (1018), 440 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1018 transitions. [2021-02-19 19:42:54,900 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1018 transitions. Word has length 27 [2021-02-19 19:42:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:54,900 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1018 transitions. [2021-02-19 19:42:54,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1018 transitions. [2021-02-19 19:42:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:54,901 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:54,901 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:55,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-02-19 19:42:55,101 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2098654405, now seen corresponding path program 54 times [2021-02-19 19:42:55,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:55,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216677243] [2021-02-19 19:42:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:55,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216677243] [2021-02-19 19:42:55,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506460086] [2021-02-19 19:42:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:55,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:42:55,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:55,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:55,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:55,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 19:42:55,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695090181] [2021-02-19 19:42:55,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:42:55,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:42:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:42:55,547 INFO L87 Difference]: Start difference. First operand 441 states and 1018 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:56,564 INFO L93 Difference]: Finished difference Result 652 states and 1423 transitions. [2021-02-19 19:42:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:42:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:56,565 INFO L225 Difference]: With dead ends: 652 [2021-02-19 19:42:56,565 INFO L226 Difference]: Without dead ends: 638 [2021-02-19 19:42:56,566 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 19:42:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-02-19 19:42:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 519. [2021-02-19 19:42:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.2915057915057915) internal successors, (1187), 518 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1187 transitions. [2021-02-19 19:42:56,571 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1187 transitions. Word has length 27 [2021-02-19 19:42:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:56,571 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 1187 transitions. [2021-02-19 19:42:56,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1187 transitions. [2021-02-19 19:42:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:56,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:56,572 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:56,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:56,772 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1085961873, now seen corresponding path program 55 times [2021-02-19 19:42:56,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:56,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360278716] [2021-02-19 19:42:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:56,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360278716] [2021-02-19 19:42:56,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674574514] [2021-02-19 19:42:56,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:56,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:57,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:57,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 19:42:57,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539823338] [2021-02-19 19:42:57,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:42:57,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:42:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:42:57,210 INFO L87 Difference]: Start difference. First operand 519 states and 1187 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:58,335 INFO L93 Difference]: Finished difference Result 692 states and 1496 transitions. [2021-02-19 19:42:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:42:58,336 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:58,337 INFO L225 Difference]: With dead ends: 692 [2021-02-19 19:42:58,337 INFO L226 Difference]: Without dead ends: 653 [2021-02-19 19:42:58,337 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:42:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-02-19 19:42:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 445. [2021-02-19 19:42:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.2995495495495497) internal successors, (1021), 444 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1021 transitions. [2021-02-19 19:42:58,342 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1021 transitions. Word has length 27 [2021-02-19 19:42:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:58,342 INFO L480 AbstractCegarLoop]: Abstraction has 445 states and 1021 transitions. [2021-02-19 19:42:58,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1021 transitions. [2021-02-19 19:42:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:58,343 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:58,343 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:58,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:58,547 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash 550732071, now seen corresponding path program 56 times [2021-02-19 19:42:58,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:58,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147713708] [2021-02-19 19:42:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:58,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147713708] [2021-02-19 19:42:58,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585825627] [2021-02-19 19:42:58,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:58,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:58,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:58,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:42:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:58,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:58,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 19:42:58,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984954936] [2021-02-19 19:42:58,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:42:58,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:42:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:42:58,979 INFO L87 Difference]: Start difference. First operand 445 states and 1021 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:59,697 INFO L93 Difference]: Finished difference Result 571 states and 1246 transitions. [2021-02-19 19:42:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:42:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:59,698 INFO L225 Difference]: With dead ends: 571 [2021-02-19 19:42:59,698 INFO L226 Difference]: Without dead ends: 533 [2021-02-19 19:42:59,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:42:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-02-19 19:42:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 415. [2021-02-19 19:42:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.1449275362318843) internal successors, (888), 414 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 888 transitions. [2021-02-19 19:42:59,706 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 888 transitions. Word has length 27 [2021-02-19 19:42:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:59,706 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 888 transitions. [2021-02-19 19:42:59,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 888 transitions. [2021-02-19 19:42:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:59,707 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:59,707 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:59,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:59,907 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash 94141561, now seen corresponding path program 57 times [2021-02-19 19:42:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:59,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586236219] [2021-02-19 19:42:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:00,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586236219] [2021-02-19 19:43:00,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211213357] [2021-02-19 19:43:00,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:00,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:43:00,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:00,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:43:00,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:00,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:00,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 19:43:00,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165220229] [2021-02-19 19:43:00,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:43:00,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:43:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:43:00,385 INFO L87 Difference]: Start difference. First operand 415 states and 888 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:02,267 INFO L93 Difference]: Finished difference Result 582 states and 1181 transitions. [2021-02-19 19:43:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:43:02,268 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:43:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:02,269 INFO L225 Difference]: With dead ends: 582 [2021-02-19 19:43:02,269 INFO L226 Difference]: Without dead ends: 565 [2021-02-19 19:43:02,269 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 19:43:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-02-19 19:43:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 328. [2021-02-19 19:43:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.1376146788990824) internal successors, (699), 327 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 699 transitions. [2021-02-19 19:43:02,273 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 699 transitions. Word has length 27 [2021-02-19 19:43:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:02,273 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 699 transitions. [2021-02-19 19:43:02,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 699 transitions. [2021-02-19 19:43:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:43:02,274 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:02,274 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:02,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:02,488 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1764176895, now seen corresponding path program 58 times [2021-02-19 19:43:02,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:02,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509517973] [2021-02-19 19:43:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:43:02,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509517973] [2021-02-19 19:43:02,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937506634] [2021-02-19 19:43:02,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:43:02,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:02,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 19:43:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:43:02,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:02,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 19:43:02,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580584542] [2021-02-19 19:43:02,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:43:02,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:43:02,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:43:02,626 INFO L87 Difference]: Start difference. First operand 328 states and 699 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-02-19 19:43:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:02,699 INFO L93 Difference]: Finished difference Result 486 states and 1004 transitions. [2021-02-19 19:43:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 19:43:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 27 [2021-02-19 19:43:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:02,700 INFO L225 Difference]: With dead ends: 486 [2021-02-19 19:43:02,700 INFO L226 Difference]: Without dead ends: 453 [2021-02-19 19:43:02,700 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:43:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-02-19 19:43:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 301. [2021-02-19 19:43:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.1333333333333333) internal successors, (640), 300 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 640 transitions. [2021-02-19 19:43:02,703 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 640 transitions. Word has length 27 [2021-02-19 19:43:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:02,704 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 640 transitions. [2021-02-19 19:43:02,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-02-19 19:43:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 640 transitions. [2021-02-19 19:43:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:02,704 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:02,704 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:02,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 19:43:02,919 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1498988557, now seen corresponding path program 59 times [2021-02-19 19:43:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:02,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236051534] [2021-02-19 19:43:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:03,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236051534] [2021-02-19 19:43:03,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272985257] [2021-02-19 19:43:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:03,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:43:03,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:03,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:03,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:03,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-02-19 19:43:03,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60584548] [2021-02-19 19:43:03,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 19:43:03,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:03,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 19:43:03,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:43:03,458 INFO L87 Difference]: Start difference. First operand 301 states and 640 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-02-19 19:43:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:04,766 INFO L93 Difference]: Finished difference Result 603 states and 1209 transitions. [2021-02-19 19:43:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 19:43:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-02-19 19:43:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:04,767 INFO L225 Difference]: With dead ends: 603 [2021-02-19 19:43:04,767 INFO L226 Difference]: Without dead ends: 575 [2021-02-19 19:43:04,767 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:43:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-02-19 19:43:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 320. [2021-02-19 19:43:04,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.1316614420062696) internal successors, (680), 319 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 680 transitions. [2021-02-19 19:43:04,771 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 680 transitions. Word has length 29 [2021-02-19 19:43:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:04,772 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 680 transitions. [2021-02-19 19:43:04,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-02-19 19:43:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 680 transitions. [2021-02-19 19:43:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:04,772 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:04,772 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:04,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:04,982 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1560408425, now seen corresponding path program 60 times [2021-02-19 19:43:04,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:04,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993209795] [2021-02-19 19:43:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:05,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993209795] [2021-02-19 19:43:05,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384098854] [2021-02-19 19:43:05,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:05,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 19:43:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:05,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:05,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:05,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-02-19 19:43:05,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130011055] [2021-02-19 19:43:05,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:43:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:43:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:43:05,454 INFO L87 Difference]: Start difference. First operand 320 states and 680 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-02-19 19:43:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:07,543 INFO L93 Difference]: Finished difference Result 793 states and 1575 transitions. [2021-02-19 19:43:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 19:43:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-02-19 19:43:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:07,544 INFO L225 Difference]: With dead ends: 793 [2021-02-19 19:43:07,544 INFO L226 Difference]: Without dead ends: 745 [2021-02-19 19:43:07,545 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 19:43:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-02-19 19:43:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 424. [2021-02-19 19:43:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.1465721040189125) internal successors, (908), 423 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 908 transitions. [2021-02-19 19:43:07,550 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 908 transitions. Word has length 29 [2021-02-19 19:43:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:07,550 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 908 transitions. [2021-02-19 19:43:07,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-02-19 19:43:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 908 transitions. [2021-02-19 19:43:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:07,551 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:07,551 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:07,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 19:43:07,754 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash 547715893, now seen corresponding path program 61 times [2021-02-19 19:43:07,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:07,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448772018] [2021-02-19 19:43:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:07,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448772018] [2021-02-19 19:43:07,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602742342] [2021-02-19 19:43:07,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:07,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:08,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:08,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-02-19 19:43:08,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192275547] [2021-02-19 19:43:08,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:43:08,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:08,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:43:08,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:43:08,255 INFO L87 Difference]: Start difference. First operand 424 states and 908 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-02-19 19:43:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:10,771 INFO L93 Difference]: Finished difference Result 978 states and 1947 transitions. [2021-02-19 19:43:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:43:10,772 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-02-19 19:43:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:10,773 INFO L225 Difference]: With dead ends: 978 [2021-02-19 19:43:10,773 INFO L226 Difference]: Without dead ends: 927 [2021-02-19 19:43:10,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 19:43:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-02-19 19:43:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 410. [2021-02-19 19:43:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.1491442542787285) internal successors, (879), 409 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 879 transitions. [2021-02-19 19:43:10,780 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 879 transitions. Word has length 29 [2021-02-19 19:43:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:10,780 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 879 transitions. [2021-02-19 19:43:10,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-02-19 19:43:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 879 transitions. [2021-02-19 19:43:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:10,780 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:10,780 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:10,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:10,981 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -130222797, now seen corresponding path program 62 times [2021-02-19 19:43:10,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:10,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880917206] [2021-02-19 19:43:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:11,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880917206] [2021-02-19 19:43:11,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407483978] [2021-02-19 19:43:11,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:11,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:43:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:11,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:11,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:11,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-02-19 19:43:11,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169684804] [2021-02-19 19:43:11,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:43:11,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:43:11,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:43:11,488 INFO L87 Difference]: Start difference. First operand 410 states and 879 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-02-19 19:43:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:13,144 INFO L93 Difference]: Finished difference Result 668 states and 1344 transitions. [2021-02-19 19:43:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 19:43:13,144 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-02-19 19:43:13,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:13,145 INFO L225 Difference]: With dead ends: 668 [2021-02-19 19:43:13,145 INFO L226 Difference]: Without dead ends: 621 [2021-02-19 19:43:13,146 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=467, Invalid=3955, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 19:43:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-02-19 19:43:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 425. [2021-02-19 19:43:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.1485849056603774) internal successors, (911), 424 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 911 transitions. [2021-02-19 19:43:13,151 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 911 transitions. Word has length 29 [2021-02-19 19:43:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:13,151 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 911 transitions. [2021-02-19 19:43:13,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-02-19 19:43:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 911 transitions. [2021-02-19 19:43:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:13,151 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:13,151 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:13,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 19:43:13,366 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1142915329, now seen corresponding path program 63 times [2021-02-19 19:43:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:13,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004187311] [2021-02-19 19:43:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:13,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004187311] [2021-02-19 19:43:13,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311196048] [2021-02-19 19:43:13,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:13,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 19:43:13,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:13,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 19:43:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:13,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:13,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-02-19 19:43:13,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183417478] [2021-02-19 19:43:13,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:43:13,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:13,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:43:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:43:13,945 INFO L87 Difference]: Start difference. First operand 425 states and 911 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-02-19 19:43:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:15,910 INFO L93 Difference]: Finished difference Result 699 states and 1402 transitions. [2021-02-19 19:43:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 19:43:15,910 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-02-19 19:43:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:15,911 INFO L225 Difference]: With dead ends: 699 [2021-02-19 19:43:15,911 INFO L226 Difference]: Without dead ends: 652 [2021-02-19 19:43:15,912 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=702, Invalid=4410, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 19:43:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-02-19 19:43:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 410. [2021-02-19 19:43:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.1589242053789732) internal successors, (883), 409 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 883 transitions. [2021-02-19 19:43:15,917 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 883 transitions. Word has length 29 [2021-02-19 19:43:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:15,917 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 883 transitions. [2021-02-19 19:43:15,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-02-19 19:43:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 883 transitions. [2021-02-19 19:43:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:15,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:15,917 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:16,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:16,132 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:16,133 INFO L82 PathProgramCache]: Analyzing trace with hash 44935741, now seen corresponding path program 64 times [2021-02-19 19:43:16,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:16,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540404006] [2021-02-19 19:43:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:16,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540404006] [2021-02-19 19:43:16,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196922336] [2021-02-19 19:43:16,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:16,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:16,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:16,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:16,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:16,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:16,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-02-19 19:43:16,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422524256] [2021-02-19 19:43:16,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:43:16,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:16,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:43:16,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:43:16,848 INFO L87 Difference]: Start difference. First operand 410 states and 883 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:19,691 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-02-19 19:43:20,118 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-02-19 19:43:20,288 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-02-19 19:43:20,552 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-02-19 19:43:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:21,517 INFO L93 Difference]: Finished difference Result 911 states and 1858 transitions. [2021-02-19 19:43:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-02-19 19:43:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:43:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:21,519 INFO L225 Difference]: With dead ends: 911 [2021-02-19 19:43:21,519 INFO L226 Difference]: Without dead ends: 862 [2021-02-19 19:43:21,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1216, Invalid=6974, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 19:43:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-02-19 19:43:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 479. [2021-02-19 19:43:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1527196652719667) internal successors, (1029), 478 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) [2021-02-19 19:43:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1029 transitions. [2021-02-19 19:43:21,526 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1029 transitions. Word has length 29 [2021-02-19 19:43:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:21,526 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1029 transitions. [2021-02-19 19:43:21,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1029 transitions. [2021-02-19 19:43:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:21,526 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:21,526 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:21,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:21,727 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1181121013, now seen corresponding path program 65 times [2021-02-19 19:43:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:21,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012490717] [2021-02-19 19:43:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:21,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012490717] [2021-02-19 19:43:21,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305739739] [2021-02-19 19:43:21,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:21,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 19:43:21,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:21,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:21,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:22,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:22,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-02-19 19:43:22,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7464453] [2021-02-19 19:43:22,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:43:22,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:22,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:43:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:43:22,416 INFO L87 Difference]: Start difference. First operand 479 states and 1029 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:25,423 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-02-19 19:43:25,555 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-02-19 19:43:25,854 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-02-19 19:43:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:27,240 INFO L93 Difference]: Finished difference Result 910 states and 1863 transitions. [2021-02-19 19:43:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-02-19 19:43:27,240 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:43:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:27,242 INFO L225 Difference]: With dead ends: 910 [2021-02-19 19:43:27,242 INFO L226 Difference]: Without dead ends: 863 [2021-02-19 19:43:27,242 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-02-19 19:43:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-02-19 19:43:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 457. [2021-02-19 19:43:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 2.1578947368421053) internal successors, (984), 456 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 984 transitions. [2021-02-19 19:43:27,248 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 984 transitions. Word has length 29 [2021-02-19 19:43:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:27,248 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 984 transitions. [2021-02-19 19:43:27,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 984 transitions. [2021-02-19 19:43:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:27,249 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:27,249 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:27,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-02-19 19:43:27,463 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2134232045, now seen corresponding path program 66 times [2021-02-19 19:43:27,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:27,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357899811] [2021-02-19 19:43:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:27,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357899811] [2021-02-19 19:43:27,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029969673] [2021-02-19 19:43:27,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:27,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:43:27,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:27,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:43:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:28,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:28,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-02-19 19:43:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942184403] [2021-02-19 19:43:28,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:43:28,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:28,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:43:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:43:28,097 INFO L87 Difference]: Start difference. First operand 457 states and 984 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-02-19 19:43:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:30,317 INFO L93 Difference]: Finished difference Result 633 states and 1292 transitions. [2021-02-19 19:43:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 19:43:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-02-19 19:43:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:30,319 INFO L225 Difference]: With dead ends: 633 [2021-02-19 19:43:30,319 INFO L226 Difference]: Without dead ends: 598 [2021-02-19 19:43:30,319 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=509, Invalid=4183, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 19:43:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-02-19 19:43:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 429. [2021-02-19 19:43:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.135514018691589) internal successors, (914), 428 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 914 transitions. [2021-02-19 19:43:30,324 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 914 transitions. Word has length 29 [2021-02-19 19:43:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:30,324 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 914 transitions. [2021-02-19 19:43:30,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-02-19 19:43:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 914 transitions. [2021-02-19 19:43:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:30,325 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:30,325 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:30,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-02-19 19:43:30,525 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1195386251, now seen corresponding path program 67 times [2021-02-19 19:43:30,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:30,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238807917] [2021-02-19 19:43:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238807917] [2021-02-19 19:43:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722279446] [2021-02-19 19:43:30,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:30,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:43:30,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:31,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:31,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-02-19 19:43:31,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674414790] [2021-02-19 19:43:31,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 19:43:31,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 19:43:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:43:31,206 INFO L87 Difference]: Start difference. First operand 429 states and 914 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-02-19 19:43:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:32,685 INFO L93 Difference]: Finished difference Result 592 states and 1203 transitions. [2021-02-19 19:43:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:43:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-02-19 19:43:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:32,687 INFO L225 Difference]: With dead ends: 592 [2021-02-19 19:43:32,687 INFO L226 Difference]: Without dead ends: 572 [2021-02-19 19:43:32,687 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=478, Invalid=3304, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 19:43:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-02-19 19:43:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 360. [2021-02-19 19:43:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1559888579387185) internal successors, (774), 359 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 774 transitions. [2021-02-19 19:43:32,691 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 774 transitions. Word has length 29 [2021-02-19 19:43:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:32,691 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 774 transitions. [2021-02-19 19:43:32,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-02-19 19:43:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 774 transitions. [2021-02-19 19:43:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:43:32,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:32,692 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:32,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:32,892 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:32,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1300576755, now seen corresponding path program 68 times [2021-02-19 19:43:32,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:32,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445430347] [2021-02-19 19:43:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:33,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445430347] [2021-02-19 19:43:33,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717876861] [2021-02-19 19:43:33,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:33,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:43:33,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:33,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:33,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:33,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-02-19 19:43:33,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240240106] [2021-02-19 19:43:33,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:43:33,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:33,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:43:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:43:33,436 INFO L87 Difference]: Start difference. First operand 360 states and 774 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-02-19 19:43:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:35,097 INFO L93 Difference]: Finished difference Result 586 states and 1199 transitions. [2021-02-19 19:43:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 19:43:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-02-19 19:43:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:35,099 INFO L225 Difference]: With dead ends: 586 [2021-02-19 19:43:35,099 INFO L226 Difference]: Without dead ends: 559 [2021-02-19 19:43:35,099 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 19:43:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-02-19 19:43:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 240. [2021-02-19 19:43:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.062761506276151) internal successors, (493), 239 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 493 transitions. [2021-02-19 19:43:35,102 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 493 transitions. Word has length 29 [2021-02-19 19:43:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:35,102 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 493 transitions. [2021-02-19 19:43:35,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-02-19 19:43:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 493 transitions. [2021-02-19 19:43:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:35,103 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:35,103 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:35,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:35,303 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:35,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1217597153, now seen corresponding path program 69 times [2021-02-19 19:43:35,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:35,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594466501] [2021-02-19 19:43:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:35,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594466501] [2021-02-19 19:43:35,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18997501] [2021-02-19 19:43:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:35,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:43:35,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:35,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:35,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:35,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:35,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:35,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556234767] [2021-02-19 19:43:35,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:35,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:35,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:35,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:35,964 INFO L87 Difference]: Start difference. First operand 240 states and 493 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:37,740 INFO L93 Difference]: Finished difference Result 513 states and 999 transitions. [2021-02-19 19:43:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:43:37,741 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:37,742 INFO L225 Difference]: With dead ends: 513 [2021-02-19 19:43:37,742 INFO L226 Difference]: Without dead ends: 458 [2021-02-19 19:43:37,742 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=722, Invalid=4828, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 19:43:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-02-19 19:43:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 297. [2021-02-19 19:43:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.125) internal successors, (629), 296 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 629 transitions. [2021-02-19 19:43:37,746 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 629 transitions. Word has length 31 [2021-02-19 19:43:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:37,746 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 629 transitions. [2021-02-19 19:43:37,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 629 transitions. [2021-02-19 19:43:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:37,746 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:37,746 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:37,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:37,947 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:37,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1988651097, now seen corresponding path program 70 times [2021-02-19 19:43:37,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:37,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384685505] [2021-02-19 19:43:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:38,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384685505] [2021-02-19 19:43:38,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053182447] [2021-02-19 19:43:38,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:38,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:38,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:38,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:38,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:38,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:38,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999234869] [2021-02-19 19:43:38,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:38,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:38,606 INFO L87 Difference]: Start difference. First operand 297 states and 629 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:40,648 INFO L93 Difference]: Finished difference Result 533 states and 1032 transitions. [2021-02-19 19:43:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 19:43:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:40,650 INFO L225 Difference]: With dead ends: 533 [2021-02-19 19:43:40,650 INFO L226 Difference]: Without dead ends: 489 [2021-02-19 19:43:40,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:43:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-02-19 19:43:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 299. [2021-02-19 19:43:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.1241610738255035) internal successors, (633), 298 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 633 transitions. [2021-02-19 19:43:40,654 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 633 transitions. Word has length 31 [2021-02-19 19:43:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:40,654 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 633 transitions. [2021-02-19 19:43:40,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 633 transitions. [2021-02-19 19:43:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:40,655 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:40,655 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:40,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-02-19 19:43:40,855 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash -892608277, now seen corresponding path program 71 times [2021-02-19 19:43:40,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:40,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783142142] [2021-02-19 19:43:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:41,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783142142] [2021-02-19 19:43:41,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321427644] [2021-02-19 19:43:41,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:41,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:43:41,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:41,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:41,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:41,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:41,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796776310] [2021-02-19 19:43:41,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:41,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:41,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:41,516 INFO L87 Difference]: Start difference. First operand 299 states and 633 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:43,723 INFO L93 Difference]: Finished difference Result 531 states and 1030 transitions. [2021-02-19 19:43:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 19:43:43,723 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:43,724 INFO L225 Difference]: With dead ends: 531 [2021-02-19 19:43:43,724 INFO L226 Difference]: Without dead ends: 493 [2021-02-19 19:43:43,725 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 19:43:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-02-19 19:43:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 301. [2021-02-19 19:43:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.1233333333333335) internal successors, (637), 300 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 637 transitions. [2021-02-19 19:43:43,729 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 637 transitions. Word has length 31 [2021-02-19 19:43:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:43,729 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 637 transitions. [2021-02-19 19:43:43,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:43,729 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 637 transitions. [2021-02-19 19:43:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:43,729 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:43,729 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:43,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:43,945 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -60183761, now seen corresponding path program 72 times [2021-02-19 19:43:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:43,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416091602] [2021-02-19 19:43:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:44,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416091602] [2021-02-19 19:43:44,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395105899] [2021-02-19 19:43:44,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:44,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:43:44,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:44,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:44,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:44,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:44,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442877864] [2021-02-19 19:43:44,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:44,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:44,664 INFO L87 Difference]: Start difference. First operand 301 states and 637 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:47,206 INFO L93 Difference]: Finished difference Result 576 states and 1113 transitions. [2021-02-19 19:43:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 19:43:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:47,208 INFO L225 Difference]: With dead ends: 576 [2021-02-19 19:43:47,208 INFO L226 Difference]: Without dead ends: 531 [2021-02-19 19:43:47,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-02-19 19:43:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-02-19 19:43:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 304. [2021-02-19 19:43:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.128712871287129) internal successors, (645), 303 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 645 transitions. [2021-02-19 19:43:47,212 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 645 transitions. Word has length 31 [2021-02-19 19:43:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:47,212 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 645 transitions. [2021-02-19 19:43:47,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 645 transitions. [2021-02-19 19:43:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:47,213 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:47,213 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:47,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:47,426 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:47,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1325111621, now seen corresponding path program 73 times [2021-02-19 19:43:47,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:47,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88851563] [2021-02-19 19:43:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:47,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88851563] [2021-02-19 19:43:47,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555948396] [2021-02-19 19:43:47,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:47,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:48,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:48,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101882567] [2021-02-19 19:43:48,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:48,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:48,174 INFO L87 Difference]: Start difference. First operand 304 states and 645 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:50,453 INFO L93 Difference]: Finished difference Result 506 states and 985 transitions. [2021-02-19 19:43:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:43:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:50,454 INFO L225 Difference]: With dead ends: 506 [2021-02-19 19:43:50,454 INFO L226 Difference]: Without dead ends: 479 [2021-02-19 19:43:50,454 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 19:43:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-02-19 19:43:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 304. [2021-02-19 19:43:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.128712871287129) internal successors, (645), 303 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 645 transitions. [2021-02-19 19:43:50,457 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 645 transitions. Word has length 31 [2021-02-19 19:43:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:50,457 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 645 transitions. [2021-02-19 19:43:50,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 645 transitions. [2021-02-19 19:43:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:50,458 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:50,458 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:50,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:50,658 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1738268047, now seen corresponding path program 74 times [2021-02-19 19:43:50,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:50,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832643823] [2021-02-19 19:43:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:50,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832643823] [2021-02-19 19:43:50,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272858648] [2021-02-19 19:43:50,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:50,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:43:50,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:50,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:51,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:51,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:51,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326954572] [2021-02-19 19:43:51,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:51,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:51,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:51,371 INFO L87 Difference]: Start difference. First operand 304 states and 645 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:53,376 INFO L93 Difference]: Finished difference Result 503 states and 981 transitions. [2021-02-19 19:43:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 19:43:53,377 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:53,378 INFO L225 Difference]: With dead ends: 503 [2021-02-19 19:43:53,378 INFO L226 Difference]: Without dead ends: 465 [2021-02-19 19:43:53,378 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:43:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-02-19 19:43:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 314. [2021-02-19 19:43:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1246006389776357) internal successors, (665), 313 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 665 transitions. [2021-02-19 19:43:53,381 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 665 transitions. Word has length 31 [2021-02-19 19:43:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:53,381 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 665 transitions. [2021-02-19 19:43:53,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 665 transitions. [2021-02-19 19:43:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:53,382 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:53,382 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:53,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 19:43:53,582 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:53,583 INFO L82 PathProgramCache]: Analyzing trace with hash -905843531, now seen corresponding path program 75 times [2021-02-19 19:43:53,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:53,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108336901] [2021-02-19 19:43:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:53,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108336901] [2021-02-19 19:43:53,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453087307] [2021-02-19 19:43:53,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:53,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:43:53,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:53,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:54,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:54,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:54,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835833476] [2021-02-19 19:43:54,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:54,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:54,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:54,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:54,313 INFO L87 Difference]: Start difference. First operand 314 states and 665 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:56,691 INFO L93 Difference]: Finished difference Result 558 states and 1083 transitions. [2021-02-19 19:43:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:43:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:56,693 INFO L225 Difference]: With dead ends: 558 [2021-02-19 19:43:56,693 INFO L226 Difference]: Without dead ends: 513 [2021-02-19 19:43:56,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 19:43:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-02-19 19:43:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 316. [2021-02-19 19:43:56,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.126984126984127) internal successors, (670), 315 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 670 transitions. [2021-02-19 19:43:56,696 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 670 transitions. Word has length 31 [2021-02-19 19:43:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:56,696 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 670 transitions. [2021-02-19 19:43:56,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 670 transitions. [2021-02-19 19:43:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:56,697 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:56,697 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:56,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:56,906 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2124195905, now seen corresponding path program 76 times [2021-02-19 19:43:56,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:56,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517345939] [2021-02-19 19:43:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:57,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517345939] [2021-02-19 19:43:57,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198379496] [2021-02-19 19:43:57,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:57,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:57,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:43:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:57,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:57,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:43:57,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587763475] [2021-02-19 19:43:57,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:57,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:57,630 INFO L87 Difference]: Start difference. First operand 316 states and 670 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:59,723 INFO L93 Difference]: Finished difference Result 488 states and 962 transitions. [2021-02-19 19:43:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:43:59,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:43:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:59,724 INFO L225 Difference]: With dead ends: 488 [2021-02-19 19:43:59,724 INFO L226 Difference]: Without dead ends: 468 [2021-02-19 19:43:59,725 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 19:43:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-02-19 19:43:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 312. [2021-02-19 19:43:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.112540192926045) internal successors, (657), 311 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 657 transitions. [2021-02-19 19:43:59,728 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 657 transitions. Word has length 31 [2021-02-19 19:43:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:59,728 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 657 transitions. [2021-02-19 19:43:59,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 657 transitions. [2021-02-19 19:43:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:43:59,728 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:59,729 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:59,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:59,929 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1658354033, now seen corresponding path program 77 times [2021-02-19 19:43:59,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:59,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314641075] [2021-02-19 19:43:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314641075] [2021-02-19 19:44:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659697546] [2021-02-19 19:44:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:00,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:44:00,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:00,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:44:00,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:00,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:00,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:44:00,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865920226] [2021-02-19 19:44:00,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:44:00,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:44:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:44:00,586 INFO L87 Difference]: Start difference. First operand 312 states and 657 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:03,362 INFO L93 Difference]: Finished difference Result 577 states and 1140 transitions. [2021-02-19 19:44:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 19:44:03,363 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:44:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:03,364 INFO L225 Difference]: With dead ends: 577 [2021-02-19 19:44:03,364 INFO L226 Difference]: Without dead ends: 529 [2021-02-19 19:44:03,364 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 19:44:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-02-19 19:44:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 325. [2021-02-19 19:44:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.1203703703703702) internal successors, (687), 324 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 687 transitions. [2021-02-19 19:44:03,368 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 687 transitions. Word has length 31 [2021-02-19 19:44:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:03,368 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 687 transitions. [2021-02-19 19:44:03,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 687 transitions. [2021-02-19 19:44:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:44:03,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:03,368 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:03,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:03,581 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash 393426173, now seen corresponding path program 78 times [2021-02-19 19:44:03,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:03,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132031175] [2021-02-19 19:44:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:03,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132031175] [2021-02-19 19:44:03,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782848277] [2021-02-19 19:44:03,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:03,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:44:03,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:03,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 19:44:03,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:04,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:04,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:44:04,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405617697] [2021-02-19 19:44:04,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:44:04,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:44:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:44:04,269 INFO L87 Difference]: Start difference. First operand 325 states and 687 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:06,792 INFO L93 Difference]: Finished difference Result 560 states and 1106 transitions. [2021-02-19 19:44:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 19:44:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:44:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:06,794 INFO L225 Difference]: With dead ends: 560 [2021-02-19 19:44:06,794 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 19:44:06,794 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 19:44:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 19:44:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 296. [2021-02-19 19:44:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.08135593220339) internal successors, (614), 295 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 614 transitions. [2021-02-19 19:44:06,798 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 614 transitions. Word has length 31 [2021-02-19 19:44:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:06,798 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 614 transitions. [2021-02-19 19:44:06,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 614 transitions. [2021-02-19 19:44:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:44:06,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:06,798 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:06,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:06,998 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:06,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1501291141, now seen corresponding path program 79 times [2021-02-19 19:44:06,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:06,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589978189] [2021-02-19 19:44:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:07,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589978189] [2021-02-19 19:44:07,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919776695] [2021-02-19 19:44:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:07,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:44:07,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:07,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:07,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-02-19 19:44:07,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500124568] [2021-02-19 19:44:07,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 19:44:07,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 19:44:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:44:07,846 INFO L87 Difference]: Start difference. First operand 296 states and 614 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 19:44:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:13,100 INFO L93 Difference]: Finished difference Result 797 states and 1604 transitions. [2021-02-19 19:44:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 19:44:13,101 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 31 [2021-02-19 19:44:13,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:13,102 INFO L225 Difference]: With dead ends: 797 [2021-02-19 19:44:13,102 INFO L226 Difference]: Without dead ends: 783 [2021-02-19 19:44:13,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1062, Invalid=8058, Unknown=0, NotChecked=0, Total=9120 [2021-02-19 19:44:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-02-19 19:44:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 340. [2021-02-19 19:44:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.0855457227138645) internal successors, (707), 339 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 707 transitions. [2021-02-19 19:44:13,106 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 707 transitions. Word has length 31 [2021-02-19 19:44:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:13,106 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 707 transitions. [2021-02-19 19:44:13,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 19:44:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 707 transitions. [2021-02-19 19:44:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:44:13,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:13,107 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:13,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:13,310 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1694555387, now seen corresponding path program 80 times [2021-02-19 19:44:13,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:13,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693031915] [2021-02-19 19:44:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:13,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693031915] [2021-02-19 19:44:13,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836875858] [2021-02-19 19:44:13,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:13,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:44:13,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:13,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:44:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:14,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:14,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2021-02-19 19:44:14,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515746417] [2021-02-19 19:44:14,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:44:14,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:44:14,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:44:14,187 INFO L87 Difference]: Start difference. First operand 340 states and 707 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:17,753 INFO L93 Difference]: Finished difference Result 552 states and 1113 transitions. [2021-02-19 19:44:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 19:44:17,754 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:44:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:17,755 INFO L225 Difference]: With dead ends: 552 [2021-02-19 19:44:17,755 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 19:44:17,755 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=629, Invalid=4627, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:44:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 19:44:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 354. [2021-02-19 19:44:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-02-19 19:44:17,758 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 31 [2021-02-19 19:44:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:17,759 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-02-19 19:44:17,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-02-19 19:44:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:44:17,759 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:17,759 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:17,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:17,959 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2071474683, now seen corresponding path program 81 times [2021-02-19 19:44:17,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:17,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167478872] [2021-02-19 19:44:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:44:18,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167478872] [2021-02-19 19:44:18,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417555065] [2021-02-19 19:44:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:18,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:44:18,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:18,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:44:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:18,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:18,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-02-19 19:44:18,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638794335] [2021-02-19 19:44:18,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 19:44:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 19:44:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:44:18,718 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 19:44:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:20,025 INFO L93 Difference]: Finished difference Result 580 states and 1168 transitions. [2021-02-19 19:44:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:44:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 31 [2021-02-19 19:44:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:20,027 INFO L225 Difference]: With dead ends: 580 [2021-02-19 19:44:20,027 INFO L226 Difference]: Without dead ends: 566 [2021-02-19 19:44:20,027 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:44:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-02-19 19:44:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 321. [2021-02-19 19:44:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.065625) internal successors, (661), 320 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 661 transitions. [2021-02-19 19:44:20,030 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 661 transitions. Word has length 31 [2021-02-19 19:44:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:20,031 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 661 transitions. [2021-02-19 19:44:20,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 19:44:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 661 transitions. [2021-02-19 19:44:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:44:20,031 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:20,031 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:20,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:20,246 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:20,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1636442769, now seen corresponding path program 82 times [2021-02-19 19:44:20,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:20,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897497278] [2021-02-19 19:44:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:44:20,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897497278] [2021-02-19 19:44:20,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220781429] [2021-02-19 19:44:20,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:20,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:44:20,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:20,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:44:20,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:44:20,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:20,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 19:44:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357692514] [2021-02-19 19:44:20,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:44:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:44:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:44:20,426 INFO L87 Difference]: Start difference. First operand 321 states and 661 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:20,550 INFO L93 Difference]: Finished difference Result 494 states and 989 transitions. [2021-02-19 19:44:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:44:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:44:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:20,551 INFO L225 Difference]: With dead ends: 494 [2021-02-19 19:44:20,551 INFO L226 Difference]: Without dead ends: 455 [2021-02-19 19:44:20,551 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:44:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-02-19 19:44:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 320. [2021-02-19 19:44:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0658307210031346) internal successors, (659), 319 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 659 transitions. [2021-02-19 19:44:20,554 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 659 transitions. Word has length 33 [2021-02-19 19:44:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:20,554 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 659 transitions. [2021-02-19 19:44:20,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 659 transitions. [2021-02-19 19:44:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:44:20,555 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:20,555 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:20,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 19:44:20,755 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1520215929, now seen corresponding path program 83 times [2021-02-19 19:44:20,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:20,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365629573] [2021-02-19 19:44:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:21,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365629573] [2021-02-19 19:44:21,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697390848] [2021-02-19 19:44:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:21,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 19:44:21,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:21,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:44:21,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:21,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:21,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-02-19 19:44:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450752768] [2021-02-19 19:44:21,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 19:44:21,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:21,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 19:44:21,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:44:21,774 INFO L87 Difference]: Start difference. First operand 320 states and 659 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:24,153 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-02-19 19:44:26,779 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 19:44:27,829 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-02-19 19:44:28,008 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 19:44:28,198 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-02-19 19:44:28,363 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-02-19 19:44:29,193 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-02-19 19:44:29,445 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-02-19 19:44:29,610 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-02-19 19:44:29,828 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-02-19 19:44:30,401 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-02-19 19:44:31,574 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 19:44:32,095 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 19:44:32,733 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-02-19 19:44:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:33,225 INFO L93 Difference]: Finished difference Result 1017 states and 2007 transitions. [2021-02-19 19:44:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-02-19 19:44:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:44:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:33,227 INFO L225 Difference]: With dead ends: 1017 [2021-02-19 19:44:33,227 INFO L226 Difference]: Without dead ends: 955 [2021-02-19 19:44:33,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-02-19 19:44:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-02-19 19:44:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 421. [2021-02-19 19:44:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.1023809523809525) internal successors, (883), 420 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 883 transitions. [2021-02-19 19:44:33,233 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 883 transitions. Word has length 33 [2021-02-19 19:44:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:33,233 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 883 transitions. [2021-02-19 19:44:33,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 883 transitions. [2021-02-19 19:44:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:44:33,234 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:33,234 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:33,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:33,434 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:33,434 INFO L82 PathProgramCache]: Analyzing trace with hash -685455063, now seen corresponding path program 84 times [2021-02-19 19:44:33,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:33,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060999062] [2021-02-19 19:44:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:44:33,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060999062] [2021-02-19 19:44:33,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112570776] [2021-02-19 19:44:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:44:33,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:44:33,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:33,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:44:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:34,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:34,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-02-19 19:44:34,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964841642] [2021-02-19 19:44:34,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 19:44:34,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 19:44:34,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:44:34,368 INFO L87 Difference]: Start difference. First operand 421 states and 883 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:36,785 INFO L93 Difference]: Finished difference Result 637 states and 1280 transitions. [2021-02-19 19:44:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 19:44:36,786 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:44:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:36,787 INFO L225 Difference]: With dead ends: 637 [2021-02-19 19:44:36,787 INFO L226 Difference]: Without dead ends: 592 [2021-02-19 19:44:36,787 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=500, Invalid=4470, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 19:44:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-02-19 19:44:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 327. [2021-02-19 19:44:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.107361963190184) internal successors, (687), 326 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 687 transitions. [2021-02-19 19:44:36,791 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 687 transitions. Word has length 33 [2021-02-19 19:44:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:36,791 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 687 transitions. [2021-02-19 19:44:36,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 687 transitions. [2021-02-19 19:44:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:44:36,791 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:36,791 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:36,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 19:44:36,992 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash 855014087, now seen corresponding path program 85 times [2021-02-19 19:44:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:36,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989535497] [2021-02-19 19:44:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:37,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989535497] [2021-02-19 19:44:37,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270189185] [2021-02-19 19:44:37,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:37,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:44:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:37,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:37,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-02-19 19:44:37,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875452310] [2021-02-19 19:44:37,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:44:37,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:37,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:44:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:44:37,938 INFO L87 Difference]: Start difference. First operand 327 states and 687 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:38,951 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 19:44:39,229 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 19:44:44,782 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 19:44:44,987 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-02-19 19:44:45,155 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-02-19 19:44:45,502 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-02-19 19:44:45,657 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-02-19 19:44:46,110 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 19:44:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:46,860 INFO L93 Difference]: Finished difference Result 914 states and 1871 transitions. [2021-02-19 19:44:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-02-19 19:44:46,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:44:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:46,862 INFO L225 Difference]: With dead ends: 914 [2021-02-19 19:44:46,862 INFO L226 Difference]: Without dead ends: 888 [2021-02-19 19:44:46,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1875, Invalid=12167, Unknown=0, NotChecked=0, Total=14042 [2021-02-19 19:44:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-02-19 19:44:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 371. [2021-02-19 19:44:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.0945945945945947) internal successors, (775), 370 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 775 transitions. [2021-02-19 19:44:46,867 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 775 transitions. Word has length 33 [2021-02-19 19:44:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:46,867 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 775 transitions. [2021-02-19 19:44:46,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 775 transitions. [2021-02-19 19:44:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:44:46,868 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:46,868 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:47,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 19:44:47,068 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:47,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:47,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1453275995, now seen corresponding path program 86 times [2021-02-19 19:44:47,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:47,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726540403] [2021-02-19 19:44:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:47,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726540403] [2021-02-19 19:44:47,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900921609] [2021-02-19 19:44:47,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:47,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:44:47,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:47,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:44:47,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:48,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:48,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:44:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464694008] [2021-02-19 19:44:48,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:44:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:44:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:44:48,059 INFO L87 Difference]: Start difference. First operand 371 states and 775 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:50,885 INFO L93 Difference]: Finished difference Result 795 states and 1605 transitions. [2021-02-19 19:44:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 19:44:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:44:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:50,886 INFO L225 Difference]: With dead ends: 795 [2021-02-19 19:44:50,886 INFO L226 Difference]: Without dead ends: 734 [2021-02-19 19:44:50,887 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 19:44:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-02-19 19:44:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 476. [2021-02-19 19:44:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.1789473684210527) internal successors, (1035), 475 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1035 transitions. [2021-02-19 19:44:50,892 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1035 transitions. Word has length 35 [2021-02-19 19:44:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:50,892 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1035 transitions. [2021-02-19 19:44:50,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1035 transitions. [2021-02-19 19:44:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:44:50,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:50,893 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:51,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 19:44:51,098 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:51,098 INFO L82 PathProgramCache]: Analyzing trace with hash -795189277, now seen corresponding path program 87 times [2021-02-19 19:44:51,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:51,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496638649] [2021-02-19 19:44:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:51,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496638649] [2021-02-19 19:44:51,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087114528] [2021-02-19 19:44:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:51,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:44:51,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:51,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:44:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:52,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:52,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:44:52,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073113413] [2021-02-19 19:44:52,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:44:52,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:44:52,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:44:52,125 INFO L87 Difference]: Start difference. First operand 476 states and 1035 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:55,380 INFO L93 Difference]: Finished difference Result 821 states and 1648 transitions. [2021-02-19 19:44:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 19:44:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:44:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:55,382 INFO L225 Difference]: With dead ends: 821 [2021-02-19 19:44:55,382 INFO L226 Difference]: Without dead ends: 771 [2021-02-19 19:44:55,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 19:44:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-02-19 19:44:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 478. [2021-02-19 19:44:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.1781970649895177) internal successors, (1039), 477 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1039 transitions. [2021-02-19 19:44:55,388 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1039 transitions. Word has length 35 [2021-02-19 19:44:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:55,388 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1039 transitions. [2021-02-19 19:44:55,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1039 transitions. [2021-02-19 19:44:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:44:55,389 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:55,389 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:55,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-02-19 19:44:55,589 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash 234973223, now seen corresponding path program 88 times [2021-02-19 19:44:55,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:55,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943975338] [2021-02-19 19:44:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943975338] [2021-02-19 19:44:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429191873] [2021-02-19 19:44:56,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:56,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:44:56,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:56,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:44:56,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:56,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:56,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:44:56,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301320485] [2021-02-19 19:44:56,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:44:56,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:44:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:44:56,738 INFO L87 Difference]: Start difference. First operand 478 states and 1039 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:00,314 INFO L93 Difference]: Finished difference Result 819 states and 1646 transitions. [2021-02-19 19:45:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 19:45:00,315 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:00,316 INFO L225 Difference]: With dead ends: 819 [2021-02-19 19:45:00,316 INFO L226 Difference]: Without dead ends: 775 [2021-02-19 19:45:00,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-02-19 19:45:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-02-19 19:45:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 480. [2021-02-19 19:45:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.1774530271398747) internal successors, (1043), 479 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1043 transitions. [2021-02-19 19:45:00,322 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1043 transitions. Word has length 35 [2021-02-19 19:45:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:00,322 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1043 transitions. [2021-02-19 19:45:00,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1043 transitions. [2021-02-19 19:45:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:00,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:00,323 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:00,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:00,523 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1331016043, now seen corresponding path program 89 times [2021-02-19 19:45:00,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:00,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824181348] [2021-02-19 19:45:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824181348] [2021-02-19 19:45:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575532749] [2021-02-19 19:45:00,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:00,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:45:00,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:00,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:00,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:01,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:01,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:01,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348158735] [2021-02-19 19:45:01,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:01,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:01,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:01,646 INFO L87 Difference]: Start difference. First operand 480 states and 1043 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:06,278 INFO L93 Difference]: Finished difference Result 817 states and 1644 transitions. [2021-02-19 19:45:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-02-19 19:45:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:06,281 INFO L225 Difference]: With dead ends: 817 [2021-02-19 19:45:06,281 INFO L226 Difference]: Without dead ends: 779 [2021-02-19 19:45:06,281 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 19:45:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-02-19 19:45:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 482. [2021-02-19 19:45:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-02-19 19:45:06,287 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 35 [2021-02-19 19:45:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:06,287 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-02-19 19:45:06,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-02-19 19:45:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:06,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:06,288 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:06,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:06,488 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:06,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2131526737, now seen corresponding path program 90 times [2021-02-19 19:45:06,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:06,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338827429] [2021-02-19 19:45:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:07,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338827429] [2021-02-19 19:45:07,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988134034] [2021-02-19 19:45:07,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:07,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 19:45:07,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:07,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:45:07,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:08,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:08,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773229244] [2021-02-19 19:45:08,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:08,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:08,008 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:15,141 INFO L93 Difference]: Finished difference Result 876 states and 1753 transitions. [2021-02-19 19:45:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-02-19 19:45:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:15,143 INFO L225 Difference]: With dead ends: 876 [2021-02-19 19:45:15,143 INFO L226 Difference]: Without dead ends: 831 [2021-02-19 19:45:15,144 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-02-19 19:45:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-02-19 19:45:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 485. [2021-02-19 19:45:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1797520661157024) internal successors, (1055), 484 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1055 transitions. [2021-02-19 19:45:15,149 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1055 transitions. Word has length 35 [2021-02-19 19:45:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:15,150 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 1055 transitions. [2021-02-19 19:45:15,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1055 transitions. [2021-02-19 19:45:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:15,150 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:15,150 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:15,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:15,351 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:15,351 INFO L82 PathProgramCache]: Analyzing trace with hash 898512699, now seen corresponding path program 91 times [2021-02-19 19:45:15,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:15,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975317902] [2021-02-19 19:45:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:15,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975317902] [2021-02-19 19:45:15,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78839458] [2021-02-19 19:45:15,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:15,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:16,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:16,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477973947] [2021-02-19 19:45:16,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:16,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:16,654 INFO L87 Difference]: Start difference. First operand 485 states and 1055 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:21,065 INFO L93 Difference]: Finished difference Result 740 states and 1493 transitions. [2021-02-19 19:45:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 19:45:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:21,066 INFO L225 Difference]: With dead ends: 740 [2021-02-19 19:45:21,066 INFO L226 Difference]: Without dead ends: 713 [2021-02-19 19:45:21,067 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-02-19 19:45:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-02-19 19:45:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 478. [2021-02-19 19:45:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.1781970649895177) internal successors, (1039), 477 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1039 transitions. [2021-02-19 19:45:21,072 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1039 transitions. Word has length 35 [2021-02-19 19:45:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:21,072 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1039 transitions. [2021-02-19 19:45:21,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1039 transitions. [2021-02-19 19:45:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:21,073 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:21,073 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:21,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-02-19 19:45:21,274 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash -695246803, now seen corresponding path program 92 times [2021-02-19 19:45:21,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:21,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328612502] [2021-02-19 19:45:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:21,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328612502] [2021-02-19 19:45:21,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917577902] [2021-02-19 19:45:21,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:21,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:45:21,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:21,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:22,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:22,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118609148] [2021-02-19 19:45:22,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:22,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:22,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:22,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:22,582 INFO L87 Difference]: Start difference. First operand 478 states and 1039 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:26,847 INFO L93 Difference]: Finished difference Result 782 states and 1573 transitions. [2021-02-19 19:45:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 19:45:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:26,849 INFO L225 Difference]: With dead ends: 782 [2021-02-19 19:45:26,849 INFO L226 Difference]: Without dead ends: 738 [2021-02-19 19:45:26,849 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 19:45:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-02-19 19:45:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 484. [2021-02-19 19:45:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.175983436853002) internal successors, (1051), 483 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1051 transitions. [2021-02-19 19:45:26,855 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1051 transitions. Word has length 35 [2021-02-19 19:45:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:26,855 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1051 transitions. [2021-02-19 19:45:26,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1051 transitions. [2021-02-19 19:45:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:26,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:26,856 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:27,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:27,070 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:27,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash 400796017, now seen corresponding path program 93 times [2021-02-19 19:45:27,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991736866] [2021-02-19 19:45:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:27,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991736866] [2021-02-19 19:45:27,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413522363] [2021-02-19 19:45:27,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:27,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:45:27,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:27,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 19:45:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:28,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:28,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:28,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253077746] [2021-02-19 19:45:28,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:28,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:28,942 INFO L87 Difference]: Start difference. First operand 484 states and 1051 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:35,204 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 19:45:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:35,593 INFO L93 Difference]: Finished difference Result 783 states and 1585 transitions. [2021-02-19 19:45:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 19:45:35,594 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:35,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:35,595 INFO L225 Difference]: With dead ends: 783 [2021-02-19 19:45:35,595 INFO L226 Difference]: Without dead ends: 745 [2021-02-19 19:45:35,596 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1102, Invalid=9404, Unknown=0, NotChecked=0, Total=10506 [2021-02-19 19:45:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-02-19 19:45:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 490. [2021-02-19 19:45:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.18200408997955) internal successors, (1067), 489 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1067 transitions. [2021-02-19 19:45:35,601 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1067 transitions. Word has length 35 [2021-02-19 19:45:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:35,601 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1067 transitions. [2021-02-19 19:45:35,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1067 transitions. [2021-02-19 19:45:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:35,602 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:35,602 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:35,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 19:45:35,802 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1233220533, now seen corresponding path program 94 times [2021-02-19 19:45:35,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:35,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600444859] [2021-02-19 19:45:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:36,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600444859] [2021-02-19 19:45:36,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809352061] [2021-02-19 19:45:36,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:36,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:45:36,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:36,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:37,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:37,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:37,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584188253] [2021-02-19 19:45:37,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:37,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:37,183 INFO L87 Difference]: Start difference. First operand 490 states and 1067 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:42,649 INFO L93 Difference]: Finished difference Result 853 states and 1717 transitions. [2021-02-19 19:45:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-02-19 19:45:42,651 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:42,652 INFO L225 Difference]: With dead ends: 853 [2021-02-19 19:45:42,652 INFO L226 Difference]: Without dead ends: 808 [2021-02-19 19:45:42,652 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 19:45:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-02-19 19:45:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 494. [2021-02-19 19:45:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.186612576064909) internal successors, (1078), 493 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1078 transitions. [2021-02-19 19:45:42,658 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1078 transitions. Word has length 35 [2021-02-19 19:45:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:42,658 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1078 transitions. [2021-02-19 19:45:42,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1078 transitions. [2021-02-19 19:45:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:42,659 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:42,659 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:42,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:42,874 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash -31707327, now seen corresponding path program 95 times [2021-02-19 19:45:42,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:42,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823010434] [2021-02-19 19:45:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823010434] [2021-02-19 19:45:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611219627] [2021-02-19 19:45:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:43,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:45:43,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:43,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:43,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:44,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:44,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557782800] [2021-02-19 19:45:44,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:44,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:44,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:44,339 INFO L87 Difference]: Start difference. First operand 494 states and 1078 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:49,251 INFO L93 Difference]: Finished difference Result 746 states and 1513 transitions. [2021-02-19 19:45:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 19:45:49,253 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:49,254 INFO L225 Difference]: With dead ends: 746 [2021-02-19 19:45:49,254 INFO L226 Difference]: Without dead ends: 719 [2021-02-19 19:45:49,254 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 19:45:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-02-19 19:45:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 388. [2021-02-19 19:45:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.111111111111111) internal successors, (817), 387 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 817 transitions. [2021-02-19 19:45:49,259 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 817 transitions. Word has length 35 [2021-02-19 19:45:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:49,259 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 817 transitions. [2021-02-19 19:45:49,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 817 transitions. [2021-02-19 19:45:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:49,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:49,260 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:49,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:49,460 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash -716572883, now seen corresponding path program 96 times [2021-02-19 19:45:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:49,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476055485] [2021-02-19 19:45:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:50,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476055485] [2021-02-19 19:45:50,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338055461] [2021-02-19 19:45:50,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:50,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 19:45:50,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:50,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:45:50,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:51,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:51,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:51,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013093921] [2021-02-19 19:45:51,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:51,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:51,239 INFO L87 Difference]: Start difference. First operand 388 states and 817 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:57,326 INFO L93 Difference]: Finished difference Result 628 states and 1221 transitions. [2021-02-19 19:45:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 19:45:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:45:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:57,329 INFO L225 Difference]: With dead ends: 628 [2021-02-19 19:45:57,329 INFO L226 Difference]: Without dead ends: 590 [2021-02-19 19:45:57,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-02-19 19:45:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-02-19 19:45:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 392. [2021-02-19 19:45:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1099744245524295) internal successors, (825), 391 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 825 transitions. [2021-02-19 19:45:57,334 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 825 transitions. Word has length 35 [2021-02-19 19:45:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:57,334 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 825 transitions. [2021-02-19 19:45:57,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 825 transitions. [2021-02-19 19:45:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:45:57,334 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:57,335 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:57,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:57,535 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:57,535 INFO L82 PathProgramCache]: Analyzing trace with hash 115851633, now seen corresponding path program 97 times [2021-02-19 19:45:57,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:57,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432712699] [2021-02-19 19:45:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:58,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432712699] [2021-02-19 19:45:58,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331204817] [2021-02-19 19:45:58,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:58,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:59,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:45:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040383262] [2021-02-19 19:45:59,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:45:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:45:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:45:59,083 INFO L87 Difference]: Start difference. First operand 392 states and 825 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:04,167 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 19:46:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:05,078 INFO L93 Difference]: Finished difference Result 697 states and 1347 transitions. [2021-02-19 19:46:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-02-19 19:46:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:46:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:05,080 INFO L225 Difference]: With dead ends: 697 [2021-02-19 19:46:05,080 INFO L226 Difference]: Without dead ends: 652 [2021-02-19 19:46:05,081 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 19:46:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-02-19 19:46:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 394. [2021-02-19 19:46:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1119592875318065) internal successors, (830), 393 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 830 transitions. [2021-02-19 19:46:05,086 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 830 transitions. Word has length 35 [2021-02-19 19:46:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:05,086 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 830 transitions. [2021-02-19 19:46:05,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 830 transitions. [2021-02-19 19:46:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:46:05,087 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:05,087 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:05,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:05,287 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:05,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1149076227, now seen corresponding path program 98 times [2021-02-19 19:46:05,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:05,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9241738] [2021-02-19 19:46:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:05,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9241738] [2021-02-19 19:46:05,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191963508] [2021-02-19 19:46:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:05,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:46:05,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:05,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:46:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:06,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:06,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:46:06,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337993200] [2021-02-19 19:46:06,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:46:06,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:46:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:46:06,855 INFO L87 Difference]: Start difference. First operand 394 states and 830 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:12,313 INFO L93 Difference]: Finished difference Result 615 states and 1206 transitions. [2021-02-19 19:46:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 19:46:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:46:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:12,315 INFO L225 Difference]: With dead ends: 615 [2021-02-19 19:46:12,315 INFO L226 Difference]: Without dead ends: 595 [2021-02-19 19:46:12,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 19:46:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-02-19 19:46:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 382. [2021-02-19 19:46:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.0918635170603674) internal successors, (797), 381 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 797 transitions. [2021-02-19 19:46:12,320 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 797 transitions. Word has length 35 [2021-02-19 19:46:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:12,320 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 797 transitions. [2021-02-19 19:46:12,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 797 transitions. [2021-02-19 19:46:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:46:12,321 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:12,321 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:12,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:12,537 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1614918099, now seen corresponding path program 99 times [2021-02-19 19:46:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:12,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903404579] [2021-02-19 19:46:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:13,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903404579] [2021-02-19 19:46:13,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501177558] [2021-02-19 19:46:13,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:13,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:46:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:13,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 19:46:13,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:14,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:14,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:46:14,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424321642] [2021-02-19 19:46:14,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:46:14,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:14,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:46:14,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:46:14,086 INFO L87 Difference]: Start difference. First operand 382 states and 797 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:19,805 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 19:46:20,349 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:46:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:21,802 INFO L93 Difference]: Finished difference Result 719 states and 1416 transitions. [2021-02-19 19:46:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 19:46:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:46:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:21,805 INFO L225 Difference]: With dead ends: 719 [2021-02-19 19:46:21,805 INFO L226 Difference]: Without dead ends: 671 [2021-02-19 19:46:21,806 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3822 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1338, Invalid=10434, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 19:46:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-02-19 19:46:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 398. [2021-02-19 19:46:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0957178841309823) internal successors, (832), 397 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 832 transitions. [2021-02-19 19:46:21,811 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 832 transitions. Word has length 35 [2021-02-19 19:46:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:21,811 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 832 transitions. [2021-02-19 19:46:21,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 832 transitions. [2021-02-19 19:46:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:46:21,812 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:21,812 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:22,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-02-19 19:46:22,014 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:22,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1415121337, now seen corresponding path program 100 times [2021-02-19 19:46:22,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:22,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86471074] [2021-02-19 19:46:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:22,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86471074] [2021-02-19 19:46:22,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183668564] [2021-02-19 19:46:22,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:22,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:46:22,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:22,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:46:22,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:23,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:23,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:46:23,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625323762] [2021-02-19 19:46:23,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:46:23,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:23,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:46:23,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:46:23,538 INFO L87 Difference]: Start difference. First operand 398 states and 832 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:30,157 INFO L93 Difference]: Finished difference Result 719 states and 1410 transitions. [2021-02-19 19:46:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 19:46:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:46:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:30,160 INFO L225 Difference]: With dead ends: 719 [2021-02-19 19:46:30,160 INFO L226 Difference]: Without dead ends: 678 [2021-02-19 19:46:30,161 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1245, Invalid=8457, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 19:46:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-02-19 19:46:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 363. [2021-02-19 19:46:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.0552486187845305) internal successors, (744), 362 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 744 transitions. [2021-02-19 19:46:30,166 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 744 transitions. Word has length 35 [2021-02-19 19:46:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:30,166 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 744 transitions. [2021-02-19 19:46:30,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 744 transitions. [2021-02-19 19:46:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:46:30,166 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:30,166 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:30,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-02-19 19:46:30,386 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:30,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1734293185, now seen corresponding path program 101 times [2021-02-19 19:46:30,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:30,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57724980] [2021-02-19 19:46:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:30,627 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 19:46:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:31,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57724980] [2021-02-19 19:46:31,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699909992] [2021-02-19 19:46:31,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:31,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 19:46:31,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:31,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:46:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:32,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:32,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-02-19 19:46:32,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93034958] [2021-02-19 19:46:32,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 19:46:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 19:46:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:46:32,563 INFO L87 Difference]: Start difference. First operand 363 states and 744 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:33,089 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 19:46:33,254 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:46:33,469 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 19:46:33,677 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:46:33,915 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 19:46:34,292 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 19:46:34,518 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 19:46:34,703 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 19:46:35,488 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-02-19 19:46:35,689 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-02-19 19:46:35,995 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:46:36,469 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:46:36,946 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 19:46:37,208 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 19:46:37,750 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:46:37,956 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-02-19 19:46:38,353 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 19:46:38,767 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-02-19 19:46:39,064 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-02-19 19:46:39,219 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 19:46:39,450 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 19:46:39,948 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 19:46:40,235 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 19:46:40,482 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:46:40,728 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 19:46:41,190 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 19:46:41,501 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 19:46:41,889 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 19:46:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:42,214 INFO L93 Difference]: Finished difference Result 667 states and 1337 transitions. [2021-02-19 19:46:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 19:46:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:46:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:42,217 INFO L225 Difference]: With dead ends: 667 [2021-02-19 19:46:42,217 INFO L226 Difference]: Without dead ends: 641 [2021-02-19 19:46:42,217 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2194 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=874, Invalid=6098, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 19:46:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-02-19 19:46:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 403. [2021-02-19 19:46:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0497512437810945) internal successors, (824), 402 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 824 transitions. [2021-02-19 19:46:42,222 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 824 transitions. Word has length 35 [2021-02-19 19:46:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:42,222 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 824 transitions. [2021-02-19 19:46:42,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 824 transitions. [2021-02-19 19:46:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:46:42,222 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:42,222 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:42,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-02-19 19:46:42,430 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:42,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:42,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1214507071, now seen corresponding path program 102 times [2021-02-19 19:46:42,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:42,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978118048] [2021-02-19 19:46:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:42,680 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 19:46:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:46:43,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978118048] [2021-02-19 19:46:43,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906442685] [2021-02-19 19:46:43,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:43,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 19:46:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:43,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:46:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:44,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:44,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2021-02-19 19:46:44,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743430087] [2021-02-19 19:46:44,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 19:46:44,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 19:46:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:46:44,430 INFO L87 Difference]: Start difference. First operand 403 states and 824 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:44,766 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 19:46:44,950 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-02-19 19:46:45,148 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 19:46:45,360 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 19:46:45,520 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-02-19 19:46:45,889 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-02-19 19:46:46,138 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-02-19 19:46:46,863 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 19:46:47,600 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 19:46:48,014 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-02-19 19:46:48,185 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:46:48,399 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 19:46:48,528 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:46:49,671 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 19:46:50,075 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 19:46:50,268 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 19:46:50,554 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-02-19 19:46:50,771 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-02-19 19:46:50,967 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 19:46:51,929 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 19:46:52,279 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 19:46:52,723 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 19:46:52,990 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 19:46:53,350 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-19 19:46:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:53,743 INFO L93 Difference]: Finished difference Result 682 states and 1367 transitions. [2021-02-19 19:46:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 19:46:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:46:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:53,747 INFO L225 Difference]: With dead ends: 682 [2021-02-19 19:46:53,747 INFO L226 Difference]: Without dead ends: 656 [2021-02-19 19:46:53,747 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=800, Invalid=5842, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 19:46:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-02-19 19:46:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 407. [2021-02-19 19:46:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0492610837438425) internal successors, (832), 406 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 832 transitions. [2021-02-19 19:46:53,752 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 832 transitions. Word has length 35 [2021-02-19 19:46:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:53,752 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 832 transitions. [2021-02-19 19:46:53,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 832 transitions. [2021-02-19 19:46:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:46:53,752 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:53,752 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:53,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 19:46:53,953 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash -677225429, now seen corresponding path program 103 times [2021-02-19 19:46:53,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:53,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363219552] [2021-02-19 19:46:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:46:54,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363219552] [2021-02-19 19:46:54,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958276311] [2021-02-19 19:46:54,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 19:46:54,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:46:54,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:54,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 19:46:54,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443021906] [2021-02-19 19:46:54,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:46:54,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:54,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:46:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:46:54,343 INFO L87 Difference]: Start difference. First operand 407 states and 832 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:54,689 INFO L93 Difference]: Finished difference Result 628 states and 1249 transitions. [2021-02-19 19:46:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:46:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:46:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:54,692 INFO L225 Difference]: With dead ends: 628 [2021-02-19 19:46:54,692 INFO L226 Difference]: Without dead ends: 580 [2021-02-19 19:46:54,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:46:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-02-19 19:46:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 433. [2021-02-19 19:46:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.060185185185185) internal successors, (890), 432 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 890 transitions. [2021-02-19 19:46:54,697 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 890 transitions. Word has length 37 [2021-02-19 19:46:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:54,697 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 890 transitions. [2021-02-19 19:46:54,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 890 transitions. [2021-02-19 19:46:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:46:54,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:54,698 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:54,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-02-19 19:46:54,898 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:54,898 INFO L82 PathProgramCache]: Analyzing trace with hash -298748235, now seen corresponding path program 104 times [2021-02-19 19:46:54,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:54,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324836111] [2021-02-19 19:46:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:55,191 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 19:46:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324836111] [2021-02-19 19:46:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812416654] [2021-02-19 19:46:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:55,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:46:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:55,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-02-19 19:46:55,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:57,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:57,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-02-19 19:46:57,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620132823] [2021-02-19 19:46:57,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 19:46:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 19:46:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:46:57,215 INFO L87 Difference]: Start difference. First operand 433 states and 890 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:57,579 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 19:46:57,833 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:46:58,061 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 19:46:58,292 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 19:46:58,467 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:46:58,629 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 19:46:59,175 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:47:00,116 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-02-19 19:47:01,226 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-02-19 19:47:01,433 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 21 [2021-02-19 19:47:01,994 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 19:47:02,330 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-19 19:47:02,897 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-02-19 19:47:03,198 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2021-02-19 19:47:03,508 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 19:47:04,170 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-02-19 19:47:04,538 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-02-19 19:47:04,788 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:47:05,087 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 19:47:05,498 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 19:47:06,249 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-02-19 19:47:06,498 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2021-02-19 19:47:06,714 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 19:47:06,940 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 19:47:07,115 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 19:47:07,311 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-02-19 19:47:07,663 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 19:47:07,817 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 19:47:08,097 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:47:08,795 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-02-19 19:47:09,277 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 19:47:09,508 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 19:47:09,908 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:47:10,088 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:47:10,308 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:47:10,494 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 19:47:10,719 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-19 19:47:12,030 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:47:12,178 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 19:47:12,478 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:47:12,685 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:47:12,841 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 19:47:13,081 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 19:47:13,292 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 19:47:13,546 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:47:13,925 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-02-19 19:47:14,220 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-02-19 19:47:14,495 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-02-19 19:47:14,755 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 19:47:15,098 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 19:47:15,829 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2021-02-19 19:47:16,000 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2021-02-19 19:47:16,354 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 19:47:16,517 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 19:47:16,715 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:47:17,255 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-02-19 19:47:17,632 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 19:47:18,025 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-02-19 19:47:18,394 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-02-19 19:47:18,853 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 19:47:19,121 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-02-19 19:47:19,713 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 19:47:20,342 WARN L202 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-02-19 19:47:20,922 WARN L202 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-02-19 19:47:21,307 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-02-19 19:47:21,852 WARN L202 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-02-19 19:47:22,147 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 23 [2021-02-19 19:47:22,421 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2021-02-19 19:47:22,773 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-02-19 19:47:23,366 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 19:47:23,951 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 19:47:24,450 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 19:47:24,607 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 19:47:25,085 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 19:47:25,279 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 19:47:25,578 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-02-19 19:47:26,364 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 19:47:26,865 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 19:47:27,997 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 19:47:28,425 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 19:47:29,036 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 19:47:29,343 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 19:47:29,735 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 19:47:30,607 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-02-19 19:47:30,777 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 19:47:31,260 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-02-19 19:47:31,536 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2021-02-19 19:47:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:31,695 INFO L93 Difference]: Finished difference Result 1610 states and 3193 transitions. [2021-02-19 19:47:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-02-19 19:47:31,697 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:47:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:31,699 INFO L225 Difference]: With dead ends: 1610 [2021-02-19 19:47:31,699 INFO L226 Difference]: Without dead ends: 1542 [2021-02-19 19:47:31,700 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-02-19 19:47:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-02-19 19:47:31,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 593. [2021-02-19 19:47:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.097972972972973) internal successors, (1242), 592 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1242 transitions. [2021-02-19 19:47:31,708 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1242 transitions. Word has length 37 [2021-02-19 19:47:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:31,708 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1242 transitions. [2021-02-19 19:47:31,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1242 transitions. [2021-02-19 19:47:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:47:31,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:31,709 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:31,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-02-19 19:47:31,922 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:31,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1790548069, now seen corresponding path program 105 times [2021-02-19 19:47:31,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:31,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823924305] [2021-02-19 19:47:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:47:32,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823924305] [2021-02-19 19:47:32,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552804820] [2021-02-19 19:47:32,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:32,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:47:32,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:32,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 19:47:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:34,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:34,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-02-19 19:47:34,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391470075] [2021-02-19 19:47:34,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 19:47:34,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 19:47:34,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:47:34,111 INFO L87 Difference]: Start difference. First operand 593 states and 1242 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:34,712 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 19:47:35,238 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-02-19 19:47:36,232 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 19:47:37,306 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:47:40,783 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-02-19 19:47:41,150 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 19:47:41,631 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 19:47:41,791 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 19:47:42,870 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 19:47:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:43,208 INFO L93 Difference]: Finished difference Result 957 states and 1930 transitions. [2021-02-19 19:47:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:47:43,211 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:47:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:43,213 INFO L225 Difference]: With dead ends: 957 [2021-02-19 19:47:43,213 INFO L226 Difference]: Without dead ends: 925 [2021-02-19 19:47:43,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3442 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=839, Invalid=9463, Unknown=0, NotChecked=0, Total=10302 [2021-02-19 19:47:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-02-19 19:47:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 612. [2021-02-19 19:47:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.0916530278232406) internal successors, (1278), 611 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1278 transitions. [2021-02-19 19:47:43,219 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1278 transitions. Word has length 37 [2021-02-19 19:47:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:43,220 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 1278 transitions. [2021-02-19 19:47:43,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1278 transitions. [2021-02-19 19:47:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:47:43,220 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:43,220 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:43,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:43,421 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:43,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:43,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1111153611, now seen corresponding path program 106 times [2021-02-19 19:47:43,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:43,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621305152] [2021-02-19 19:47:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:47:44,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621305152] [2021-02-19 19:47:44,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755483914] [2021-02-19 19:47:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:44,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:47:44,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:44,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 19:47:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:45,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:45,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-02-19 19:47:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008492964] [2021-02-19 19:47:45,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:47:45,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:47:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:47:45,657 INFO L87 Difference]: Start difference. First operand 612 states and 1278 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:51,688 INFO L93 Difference]: Finished difference Result 904 states and 1819 transitions. [2021-02-19 19:47:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 19:47:51,688 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:47:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:51,689 INFO L225 Difference]: With dead ends: 904 [2021-02-19 19:47:51,689 INFO L226 Difference]: Without dead ends: 865 [2021-02-19 19:47:51,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=465, Invalid=5235, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:47:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-02-19 19:47:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 532. [2021-02-19 19:47:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.096045197740113) internal successors, (1113), 531 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1113 transitions. [2021-02-19 19:47:51,695 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1113 transitions. Word has length 37 [2021-02-19 19:47:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:51,695 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1113 transitions. [2021-02-19 19:47:51,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1113 transitions. [2021-02-19 19:47:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:47:51,696 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:51,696 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:51,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:51,896 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:51,896 INFO L82 PathProgramCache]: Analyzing trace with hash -827406277, now seen corresponding path program 107 times [2021-02-19 19:47:51,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:51,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030421072] [2021-02-19 19:47:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:47:52,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030421072] [2021-02-19 19:47:52,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42223057] [2021-02-19 19:47:52,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:52,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:47:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:52,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 19:47:52,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:54,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:54,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-02-19 19:47:54,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489493849] [2021-02-19 19:47:54,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:47:54,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:54,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:47:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:47:54,079 INFO L87 Difference]: Start difference. First operand 532 states and 1113 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:59,745 INFO L93 Difference]: Finished difference Result 801 states and 1628 transitions. [2021-02-19 19:47:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 19:47:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:47:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:59,748 INFO L225 Difference]: With dead ends: 801 [2021-02-19 19:47:59,748 INFO L226 Difference]: Without dead ends: 762 [2021-02-19 19:47:59,749 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=484, Invalid=5216, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 19:47:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-02-19 19:47:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 549. [2021-02-19 19:47:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0948905109489053) internal successors, (1148), 548 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1148 transitions. [2021-02-19 19:47:59,754 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1148 transitions. Word has length 37 [2021-02-19 19:47:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:59,754 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 1148 transitions. [2021-02-19 19:47:59,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1148 transitions. [2021-02-19 19:47:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:47:59,755 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:59,755 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:59,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 19:47:59,956 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:59,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2052628743, now seen corresponding path program 108 times [2021-02-19 19:47:59,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:59,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24453138] [2021-02-19 19:47:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:00,163 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 19:48:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24453138] [2021-02-19 19:48:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643654083] [2021-02-19 19:48:00,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:00,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 19:48:00,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:00,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-02-19 19:48:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:02,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:02,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-02-19 19:48:02,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338043806] [2021-02-19 19:48:02,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 19:48:02,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 19:48:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:48:02,277 INFO L87 Difference]: Start difference. First operand 549 states and 1148 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:02,648 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 19:48:02,893 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:48:03,112 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 19:48:03,429 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 19:48:03,604 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:48:03,859 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 19:48:04,024 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-02-19 19:48:04,296 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-02-19 19:48:04,601 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 19:48:05,240 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 19:48:05,652 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 19:48:06,094 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 19:48:06,356 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:48:06,563 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 19:48:06,775 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 19:48:07,197 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 19:48:07,415 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 19:48:07,617 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 19:48:07,856 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 19:48:08,038 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 19:48:08,263 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:48:08,637 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 19:48:08,892 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-02-19 19:48:09,110 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-02-19 19:48:09,285 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2021-02-19 19:48:09,502 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-02-19 19:48:09,737 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 19:48:10,022 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 19:48:10,230 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 19:48:10,368 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 19:48:10,643 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:48:10,841 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:48:11,066 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 19:48:11,534 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-02-19 19:48:11,700 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 19:48:12,040 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 19:48:12,187 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 19:48:12,385 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 19:48:12,554 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 19:48:12,751 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 19:48:12,967 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-02-19 19:48:13,680 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:48:13,856 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:48:14,662 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 19:48:14,888 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 19:48:15,040 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 19:48:15,182 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 19:48:15,332 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 19:48:15,622 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 19:48:16,342 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-02-19 19:48:16,602 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 19:48:16,960 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-02-19 19:48:17,409 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 19:48:17,733 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-02-19 19:48:17,996 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 19:48:18,734 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-02-19 19:48:19,095 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-02-19 19:48:19,454 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 19:48:19,959 WARN L202 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-02-19 19:48:20,424 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 19:48:20,746 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-02-19 19:48:21,267 WARN L202 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-02-19 19:48:21,736 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-02-19 19:48:22,035 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-02-19 19:48:22,803 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 19:48:23,252 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 19:48:23,528 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 19:48:23,871 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 19:48:24,792 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 19:48:25,118 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 19:48:25,402 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 19:48:25,664 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 19:48:26,019 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 19:48:26,207 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 19:48:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:26,373 INFO L93 Difference]: Finished difference Result 1528 states and 3121 transitions. [2021-02-19 19:48:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-02-19 19:48:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:48:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:26,376 INFO L225 Difference]: With dead ends: 1528 [2021-02-19 19:48:26,376 INFO L226 Difference]: Without dead ends: 1502 [2021-02-19 19:48:26,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8027 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=2579, Invalid=18591, Unknown=0, NotChecked=0, Total=21170 [2021-02-19 19:48:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-02-19 19:48:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 569. [2021-02-19 19:48:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.091549295774648) internal successors, (1188), 568 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1188 transitions. [2021-02-19 19:48:26,384 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1188 transitions. Word has length 37 [2021-02-19 19:48:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:26,384 INFO L480 AbstractCegarLoop]: Abstraction has 569 states and 1188 transitions. [2021-02-19 19:48:26,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1188 transitions. [2021-02-19 19:48:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:48:26,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:26,384 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:26,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:26,585 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1385158551, now seen corresponding path program 109 times [2021-02-19 19:48:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:26,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685128618] [2021-02-19 19:48:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:27,198 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:48:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:27,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685128618] [2021-02-19 19:48:27,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811977274] [2021-02-19 19:48:27,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:27,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:48:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:28,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:28,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:48:28,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025236028] [2021-02-19 19:48:28,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:48:28,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:48:28,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:48:28,800 INFO L87 Difference]: Start difference. First operand 569 states and 1188 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:34,943 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:48:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:35,661 INFO L93 Difference]: Finished difference Result 1117 states and 2277 transitions. [2021-02-19 19:48:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 19:48:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:48:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:35,665 INFO L225 Difference]: With dead ends: 1117 [2021-02-19 19:48:35,665 INFO L226 Difference]: Without dead ends: 1050 [2021-02-19 19:48:35,665 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-02-19 19:48:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-02-19 19:48:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 697. [2021-02-19 19:48:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.1695402298850577) internal successors, (1510), 696 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1510 transitions. [2021-02-19 19:48:35,672 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1510 transitions. Word has length 39 [2021-02-19 19:48:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:35,672 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 1510 transitions. [2021-02-19 19:48:35,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1510 transitions. [2021-02-19 19:48:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:48:35,673 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:35,673 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:35,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:35,873 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 978582047, now seen corresponding path program 110 times [2021-02-19 19:48:35,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:35,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140208702] [2021-02-19 19:48:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:36,487 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:48:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:36,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140208702] [2021-02-19 19:48:36,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972401109] [2021-02-19 19:48:36,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:36,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:48:36,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:36,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:48:36,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:38,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:38,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:48:38,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657065231] [2021-02-19 19:48:38,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:48:38,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:38,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:48:38,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:48:38,093 INFO L87 Difference]: Start difference. First operand 697 states and 1510 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:45,476 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:48:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:46,279 INFO L93 Difference]: Finished difference Result 1149 states and 2330 transitions. [2021-02-19 19:48:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 19:48:46,282 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:48:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:46,283 INFO L225 Difference]: With dead ends: 1149 [2021-02-19 19:48:46,283 INFO L226 Difference]: Without dead ends: 1093 [2021-02-19 19:48:46,284 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 19:48:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-02-19 19:48:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 699. [2021-02-19 19:48:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.169054441260745) internal successors, (1514), 698 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1514 transitions. [2021-02-19 19:48:46,291 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1514 transitions. Word has length 39 [2021-02-19 19:48:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:46,291 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 1514 transitions. [2021-02-19 19:48:46,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1514 transitions. [2021-02-19 19:48:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:48:46,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:46,291 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:46,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:46,492 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:46,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1172700829, now seen corresponding path program 111 times [2021-02-19 19:48:46,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:46,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421975364] [2021-02-19 19:48:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:47,129 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:48:47,280 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 19:48:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421975364] [2021-02-19 19:48:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275849385] [2021-02-19 19:48:47,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:47,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 19:48:47,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:47,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:48:47,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:48,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:48,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:48:48,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512538336] [2021-02-19 19:48:48,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:48:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:48,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:48:48,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:48:48,807 INFO L87 Difference]: Start difference. First operand 699 states and 1514 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:56,264 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:48:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:56,965 INFO L93 Difference]: Finished difference Result 1147 states and 2328 transitions. [2021-02-19 19:48:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:48:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:48:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:56,969 INFO L225 Difference]: With dead ends: 1147 [2021-02-19 19:48:56,969 INFO L226 Difference]: Without dead ends: 1097 [2021-02-19 19:48:56,970 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-02-19 19:48:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-02-19 19:48:56,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 701. [2021-02-19 19:48:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1685714285714286) internal successors, (1518), 700 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1518 transitions. [2021-02-19 19:48:56,977 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1518 transitions. Word has length 39 [2021-02-19 19:48:56,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:56,977 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 1518 transitions. [2021-02-19 19:48:56,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1518 transitions. [2021-02-19 19:48:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:48:56,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:56,977 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:57,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-02-19 19:48:57,178 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:57,178 INFO L82 PathProgramCache]: Analyzing trace with hash -142538329, now seen corresponding path program 112 times [2021-02-19 19:48:57,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:57,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538337518] [2021-02-19 19:48:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:57,847 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:48:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:58,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538337518] [2021-02-19 19:48:58,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685670651] [2021-02-19 19:48:58,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:58,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:48:58,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:58,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:48:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:59,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:59,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:48:59,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749592674] [2021-02-19 19:48:59,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:48:59,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:48:59,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:48:59,546 INFO L87 Difference]: Start difference. First operand 701 states and 1518 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:07,615 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:49:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:08,280 INFO L93 Difference]: Finished difference Result 1145 states and 2326 transitions. [2021-02-19 19:49:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-02-19 19:49:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:49:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:08,283 INFO L225 Difference]: With dead ends: 1145 [2021-02-19 19:49:08,284 INFO L226 Difference]: Without dead ends: 1101 [2021-02-19 19:49:08,284 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1433, Invalid=10557, Unknown=0, NotChecked=0, Total=11990 [2021-02-19 19:49:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-02-19 19:49:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 703. [2021-02-19 19:49:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.168091168091168) internal successors, (1522), 702 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1522 transitions. [2021-02-19 19:49:08,291 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1522 transitions. Word has length 39 [2021-02-19 19:49:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:08,291 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1522 transitions. [2021-02-19 19:49:08,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1522 transitions. [2021-02-19 19:49:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:49:08,292 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:08,292 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:08,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-02-19 19:49:08,506 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash 953504491, now seen corresponding path program 113 times [2021-02-19 19:49:08,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:08,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010541726] [2021-02-19 19:49:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:09,171 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:49:09,330 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 19:49:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:09,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010541726] [2021-02-19 19:49:09,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988069436] [2021-02-19 19:49:09,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:09,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 19:49:09,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:09,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:49:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:11,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:11,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:49:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144533140] [2021-02-19 19:49:11,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:49:11,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:49:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:49:11,028 INFO L87 Difference]: Start difference. First operand 703 states and 1522 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:20,748 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:49:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:21,823 INFO L93 Difference]: Finished difference Result 1143 states and 2324 transitions. [2021-02-19 19:49:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-02-19 19:49:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:49:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:21,827 INFO L225 Difference]: With dead ends: 1143 [2021-02-19 19:49:21,827 INFO L226 Difference]: Without dead ends: 1105 [2021-02-19 19:49:21,828 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-02-19 19:49:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-02-19 19:49:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 705. [2021-02-19 19:49:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.1676136363636362) internal successors, (1526), 704 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1526 transitions. [2021-02-19 19:49:21,835 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1526 transitions. Word has length 39 [2021-02-19 19:49:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:21,835 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 1526 transitions. [2021-02-19 19:49:21,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:21,835 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1526 transitions. [2021-02-19 19:49:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:49:21,835 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:21,836 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:22,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-02-19 19:49:22,036 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:22,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1785929007, now seen corresponding path program 114 times [2021-02-19 19:49:22,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:22,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931123903] [2021-02-19 19:49:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:22,704 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 19:49:22,887 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:49:23,048 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 19:49:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931123903] [2021-02-19 19:49:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899419087] [2021-02-19 19:49:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:23,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 19:49:23,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:23,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 19:49:23,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:25,281 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 19:49:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:25,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:25,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:49:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585902697] [2021-02-19 19:49:25,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:49:25,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:49:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:49:25,448 INFO L87 Difference]: Start difference. First operand 705 states and 1526 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:26,299 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:49:27,927 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-02-19 19:49:32,156 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-02-19 19:49:33,983 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 19:49:35,338 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 19:49:35,802 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2021-02-19 19:49:36,462 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 19:49:36,777 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 19:49:37,338 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 19:49:37,726 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 15 [2021-02-19 19:49:37,923 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 20 [2021-02-19 19:49:38,329 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 19:49:38,550 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 19 [2021-02-19 19:49:38,838 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 21 [2021-02-19 19:49:39,068 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 19:49:39,401 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 19:49:39,812 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 19:49:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:40,648 INFO L93 Difference]: Finished difference Result 1210 states and 2447 transitions. [2021-02-19 19:49:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-02-19 19:49:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:49:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:40,652 INFO L225 Difference]: With dead ends: 1210 [2021-02-19 19:49:40,652 INFO L226 Difference]: Without dead ends: 1165 [2021-02-19 19:49:40,653 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4965 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1875, Invalid=14637, Unknown=0, NotChecked=0, Total=16512 [2021-02-19 19:49:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-02-19 19:49:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 708. [2021-02-19 19:49:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.16973125884017) internal successors, (1534), 707 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1534 transitions. [2021-02-19 19:49:40,659 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1534 transitions. Word has length 39 [2021-02-19 19:49:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:40,659 INFO L480 AbstractCegarLoop]: Abstraction has 708 states and 1534 transitions. [2021-02-19 19:49:40,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1534 transitions. [2021-02-19 19:49:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:49:40,660 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:40,660 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:40,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:40,861 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash 521001147, now seen corresponding path program 115 times [2021-02-19 19:49:40,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:40,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373269411] [2021-02-19 19:49:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:41,526 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 19:49:41,712 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-02-19 19:49:41,893 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 19:49:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:42,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373269411] [2021-02-19 19:49:42,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569712057] [2021-02-19 19:49:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:42,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:49:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:43,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:43,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:49:43,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384852456] [2021-02-19 19:49:43,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:49:43,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:43,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:49:43,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:49:43,587 INFO L87 Difference]: Start difference. First operand 708 states and 1534 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:44,459 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2021-02-19 19:49:46,166 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 14 [2021-02-19 19:49:51,810 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2021-02-19 19:49:53,718 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-02-19 19:49:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:54,519 INFO L93 Difference]: Finished difference Result 1038 states and 2112 transitions. [2021-02-19 19:49:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 19:49:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:49:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:54,523 INFO L225 Difference]: With dead ends: 1038 [2021-02-19 19:49:54,523 INFO L226 Difference]: Without dead ends: 1018 [2021-02-19 19:49:54,524 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1585, Invalid=10187, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 19:49:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-02-19 19:49:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 709. [2021-02-19 19:49:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 2.169491525423729) internal successors, (1536), 708 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1536 transitions. [2021-02-19 19:49:54,530 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1536 transitions. Word has length 39 [2021-02-19 19:49:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:54,530 INFO L480 AbstractCegarLoop]: Abstraction has 709 states and 1536 transitions. [2021-02-19 19:49:54,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1536 transitions. [2021-02-19 19:49:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:49:54,531 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:54,531 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:54,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:54,731 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1760948247, now seen corresponding path program 116 times [2021-02-19 19:49:54,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:54,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179704438] [2021-02-19 19:49:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:55,457 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:49:55,621 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 19:49:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:55,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179704438] [2021-02-19 19:49:55,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722618277] [2021-02-19 19:49:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:55,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:49:55,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:55,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:49:55,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:57,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:57,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:49:57,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782100026] [2021-02-19 19:49:57,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:49:57,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:57,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:49:57,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:49:57,360 INFO L87 Difference]: Start difference. First operand 709 states and 1536 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:01,802 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-02-19 19:50:03,550 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-02-19 19:50:04,656 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-02-19 19:50:05,289 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-02-19 19:50:05,488 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:50:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:50:06,609 INFO L93 Difference]: Finished difference Result 1115 states and 2265 transitions. [2021-02-19 19:50:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 19:50:06,611 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:50:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:50:06,613 INFO L225 Difference]: With dead ends: 1115 [2021-02-19 19:50:06,613 INFO L226 Difference]: Without dead ends: 1065 [2021-02-19 19:50:06,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 19:50:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-02-19 19:50:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 715. [2021-02-19 19:50:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.168067226890756) internal successors, (1548), 714 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1548 transitions. [2021-02-19 19:50:06,620 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1548 transitions. Word has length 39 [2021-02-19 19:50:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:50:06,620 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 1548 transitions. [2021-02-19 19:50:06,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1548 transitions. [2021-02-19 19:50:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:50:06,621 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:50:06,621 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:50:06,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:06,821 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:50:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:50:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash -730785747, now seen corresponding path program 117 times [2021-02-19 19:50:06,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:50:06,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613379314] [2021-02-19 19:50:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:50:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:07,613 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:50:07,812 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 19:50:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613379314] [2021-02-19 19:50:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601843712] [2021-02-19 19:50:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:07,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 19:50:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:50:07,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 19:50:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:50:10,329 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 19:50:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:10,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:50:10,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:50:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516332491] [2021-02-19 19:50:10,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:50:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:50:10,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:50:10,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:50:10,529 INFO L87 Difference]: Start difference. First operand 715 states and 1548 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:13,007 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-02-19 19:50:17,423 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-02-19 19:50:18,507 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 19:50:19,294 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-02-19 19:50:19,984 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 20 [2021-02-19 19:50:20,272 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-02-19 19:50:20,845 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-02-19 19:50:21,377 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2021-02-19 19:50:21,592 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:50:21,854 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-02-19 19:50:22,258 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2021-02-19 19:50:22,636 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 19:50:22,905 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2021-02-19 19:50:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:50:23,325 INFO L93 Difference]: Finished difference Result 1120 states and 2289 transitions. [2021-02-19 19:50:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:50:23,328 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:50:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:50:23,329 INFO L225 Difference]: With dead ends: 1120 [2021-02-19 19:50:23,329 INFO L226 Difference]: Without dead ends: 1076 [2021-02-19 19:50:23,330 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1293, Invalid=10479, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 19:50:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-02-19 19:50:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 725. [2021-02-19 19:50:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.1767955801104972) internal successors, (1576), 724 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1576 transitions. [2021-02-19 19:50:23,337 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1576 transitions. Word has length 39 [2021-02-19 19:50:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:50:23,337 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 1576 transitions. [2021-02-19 19:50:23,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1576 transitions. [2021-02-19 19:50:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:50:23,338 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:50:23,338 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:50:23,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:23,546 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:50:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:50:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash 365257073, now seen corresponding path program 118 times [2021-02-19 19:50:23,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:50:23,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28977420] [2021-02-19 19:50:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:50:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:24,346 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:50:24,531 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 19:50:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:24,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28977420] [2021-02-19 19:50:24,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648993002] [2021-02-19 19:50:24,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:24,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:50:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:50:24,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:50:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:50:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:26,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:50:26,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 19:50:26,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048302497] [2021-02-19 19:50:26,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:50:26,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:50:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:50:26,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:50:26,479 INFO L87 Difference]: Start difference. First operand 725 states and 1576 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-02-19 19:50:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:50:26,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-02-19 19:50:26,924 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:50:26,928 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:50:26,928 INFO L202 PluginConnector]: Adding new model counter-add-2-context-alt-Rdp.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:50:26 BasicIcfg [2021-02-19 19:50:26,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:50:26,928 INFO L168 Benchmark]: Toolchain (without parser) took 543069.78 ms. Allocated memory was 255.9 MB in the beginning and 497.0 MB in the end (delta: 241.2 MB). Free memory was 236.3 MB in the beginning and 198.0 MB in the end (delta: 38.3 MB). Peak memory consumption was 280.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:26,928 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:50:26,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.70 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:50:26,928 INFO L168 Benchmark]: Boogie Preprocessor took 12.27 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 989.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:26,929 INFO L168 Benchmark]: RCFGBuilder took 198.62 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:26,929 INFO L168 Benchmark]: TraceAbstraction took 542833.38 ms. Allocated memory was 255.9 MB in the beginning and 497.0 MB in the end (delta: 241.2 MB). Free memory was 238.8 MB in the beginning and 198.0 MB in the end (delta: 40.8 MB). Peak memory consumption was 281.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:26,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.70 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.27 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 989.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 198.62 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 542833.38 ms. Allocated memory was 255.9 MB in the beginning and 497.0 MB in the end (delta: 241.2 MB). Free memory was 238.8 MB in the beginning and 198.0 MB in the end (delta: 40.8 MB). Peak memory consumption was 281.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 49). Cancelled while BasicCegarLoop was constructing difference of abstraction (725states) and FLOYD_HOARE automaton (currently 7 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (9 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 542.7s, OverallIterations: 120, TraceHistogramMax: 6, AutomataDifference: 411.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4642 SDtfs, 25575 SDslu, 60502 SDs, 0 SdLazy, 127691 SolverSat, 7550 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10301 GetRequests, 1873 SyntacticMatches, 139 SemanticMatches, 8289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219957 ImplicationChecksByTransitivity, 378.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=725occurred in iteration=119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 119 MinimizatonAttempts, 27118 StatesRemovedByMinimization, 119 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 103.2s InterpolantComputationTime, 6896 NumberOfCodeBlocks, 6896 NumberOfCodeBlocksAsserted, 498 NumberOfCheckSat, 6658 ConstructedInterpolants, 0 QuantifiedInterpolants, 2952216 SizeOfPredicates, 575 NumberOfNonLiveVariables, 7459 ConjunctsInSsa, 4234 ConjunctsInUnsatCore, 238 InterpolantComputations, 2 PerfectInterpolantSequences, 735/6903 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown