/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:28:43,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:28:43,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:28:43,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:28:43,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 19:28:43,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:28:43,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:28:43,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:28:43,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:28:43,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:28:43,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:28:43,447 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:28:43,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:28:43,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:28:43,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:28:43,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:28:43,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:28:43,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:28:43,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:28:43,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:28:43,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:28:43,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:28:43,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:28:43,712 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:28:43,712 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:28:43,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2021-08-12 19:28:43,713 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2021-08-12 19:28:43,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:28:43,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:28:43,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:28:43,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:28:43,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:28:43,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:28:43,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:28:43,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:28:43,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:28:43,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... [2021-08-12 19:28:43,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:28:43,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:28:43,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:28:43,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:28:43,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:28:43,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:28:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:28:43,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:28:43,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:28:43,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:28:43,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:28:43,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:28:43,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:28:43,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:28:43,839 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:28:44,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:28:44,024 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:28:44,026 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:28:44 BoogieIcfgContainer [2021-08-12 19:28:44,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:28:44,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:28:44,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:28:44,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:28:44,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:28:43" (1/2) ... [2021-08-12 19:28:44,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acec2ea and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:28:44, skipping insertion in model container [2021-08-12 19:28:44,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:28:44" (2/2) ... [2021-08-12 19:28:44,030 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2021-08-12 19:28:44,034 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:28:44,034 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:28:44,035 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:28:44,099 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:28:44,129 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:28:44,148 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:28:44,148 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:28:44,148 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:28:44,148 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:28:44,148 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:28:44,148 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:28:44,148 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:28:44,148 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:28:44,154 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-08-12 19:28:44,172 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) [2021-08-12 19:28:44,174 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) [2021-08-12 19:28:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:28:44,179 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:44,179 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:44,180 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:44,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1891492345, now seen corresponding path program 1 times [2021-08-12 19:28:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:44,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099908949] [2021-08-12 19:28:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:44,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:44,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099908949] [2021-08-12 19:28:44,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099908949] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:28:44,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:28:44,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:28:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660031855] [2021-08-12 19:28:44,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:28:44,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:44,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:28:44,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:28:44,353 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 3 states, 3 states have (on average 5.0) 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) [2021-08-12 19:28:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:44,388 INFO L93 Difference]: Finished difference Result 83 states and 153 transitions. [2021-08-12 19:28:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:28:44,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) 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 [2021-08-12 19:28:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:44,397 INFO L225 Difference]: With dead ends: 83 [2021-08-12 19:28:44,397 INFO L226 Difference]: Without dead ends: 43 [2021-08-12 19:28:44,399 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:28:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-12 19:28:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-08-12 19:28:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 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) [2021-08-12 19:28:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-08-12 19:28:44,427 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-08-12 19:28:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:44,427 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-08-12 19:28:44,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) 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) [2021-08-12 19:28:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-08-12 19:28:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:28:44,428 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:44,428 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:44,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:28:44,428 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash -672639493, now seen corresponding path program 1 times [2021-08-12 19:28:44,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:44,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985877552] [2021-08-12 19:28:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:44,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:44,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985877552] [2021-08-12 19:28:44,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985877552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:44,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797214408] [2021-08-12 19:28:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:28:44,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:44,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797214408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:44,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:44,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-12 19:28:44,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234688621] [2021-08-12 19:28:44,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:28:44,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:28:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:28:44,708 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:44,857 INFO L93 Difference]: Finished difference Result 77 states and 133 transitions. [2021-08-12 19:28:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:28:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:28:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:44,861 INFO L225 Difference]: With dead ends: 77 [2021-08-12 19:28:44,861 INFO L226 Difference]: Without dead ends: 64 [2021-08-12 19:28:44,863 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:28:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-12 19:28:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-08-12 19:28:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2021-08-12 19:28:44,871 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2021-08-12 19:28:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:44,872 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2021-08-12 19:28:44,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2021-08-12 19:28:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:28:44,872 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:44,872 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:45,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 19:28:45,091 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1676307169, now seen corresponding path program 2 times [2021-08-12 19:28:45,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:45,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061605502] [2021-08-12 19:28:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:45,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:45,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061605502] [2021-08-12 19:28:45,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061605502] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:28:45,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:28:45,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-12 19:28:45,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902789711] [2021-08-12 19:28:45,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:28:45,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:45,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:28:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:28:45,126 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-08-12 19:28:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:45,185 INFO L93 Difference]: Finished difference Result 64 states and 109 transitions. [2021-08-12 19:28:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:28:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2021-08-12 19:28:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:45,188 INFO L225 Difference]: With dead ends: 64 [2021-08-12 19:28:45,188 INFO L226 Difference]: Without dead ends: 49 [2021-08-12 19:28:45,188 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:28:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-12 19:28:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-08-12 19:28:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-08-12 19:28:45,192 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-08-12 19:28:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:45,192 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-08-12 19:28:45,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-08-12 19:28:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-08-12 19:28:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:28:45,194 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:45,194 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:45,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:28:45,195 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:45,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1210697401, now seen corresponding path program 1 times [2021-08-12 19:28:45,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:45,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524705196] [2021-08-12 19:28:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:45,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:45,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524705196] [2021-08-12 19:28:45,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524705196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667525466] [2021-08-12 19:28:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:28:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:45,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667525466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:45,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:45,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 19:28:45,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734288881] [2021-08-12 19:28:45,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:28:45,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:45,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:28:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:28:45,349 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:45,379 INFO L93 Difference]: Finished difference Result 120 states and 223 transitions. [2021-08-12 19:28:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:28:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:28:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:45,384 INFO L225 Difference]: With dead ends: 120 [2021-08-12 19:28:45,384 INFO L226 Difference]: Without dead ends: 76 [2021-08-12 19:28:45,385 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:28:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-12 19:28:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-08-12 19:28:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2021-08-12 19:28:45,398 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2021-08-12 19:28:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:45,398 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2021-08-12 19:28:45,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2021-08-12 19:28:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:28:45,399 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:45,399 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:45,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:45,600 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1830185403, now seen corresponding path program 2 times [2021-08-12 19:28:45,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:45,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223550830] [2021-08-12 19:28:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:45,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223550830] [2021-08-12 19:28:45,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223550830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73038232] [2021-08-12 19:28:45,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:45,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:45,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:28:45,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:45,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73038232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:45,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:45,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-12 19:28:45,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366502172] [2021-08-12 19:28:45,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:28:45,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:28:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:28:45,889 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:46,208 INFO L93 Difference]: Finished difference Result 187 states and 367 transitions. [2021-08-12 19:28:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:28:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:28:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:46,210 INFO L225 Difference]: With dead ends: 187 [2021-08-12 19:28:46,210 INFO L226 Difference]: Without dead ends: 168 [2021-08-12 19:28:46,210 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:28:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-12 19:28:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 68. [2021-08-12 19:28:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-08-12 19:28:46,216 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2021-08-12 19:28:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:46,216 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-08-12 19:28:46,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-08-12 19:28:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:28:46,220 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:46,220 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:46,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:46,449 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1099819493, now seen corresponding path program 3 times [2021-08-12 19:28:46,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:46,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510065848] [2021-08-12 19:28:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:46,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:46,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510065848] [2021-08-12 19:28:46,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510065848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:46,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374982747] [2021-08-12 19:28:46,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:46,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:28:46,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:28:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:46,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374982747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:46,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:46,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 19:28:46,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344310169] [2021-08-12 19:28:46,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:28:46,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:28:46,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:28:46,665 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:46,910 INFO L93 Difference]: Finished difference Result 159 states and 292 transitions. [2021-08-12 19:28:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:28:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:28:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:46,911 INFO L225 Difference]: With dead ends: 159 [2021-08-12 19:28:46,911 INFO L226 Difference]: Without dead ends: 142 [2021-08-12 19:28:46,911 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:28:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-12 19:28:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2021-08-12 19:28:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2021-08-12 19:28:46,916 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2021-08-12 19:28:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:46,917 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2021-08-12 19:28:46,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2021-08-12 19:28:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:28:46,917 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:46,917 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:47,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:47,137 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:47,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1243736697, now seen corresponding path program 4 times [2021-08-12 19:28:47,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:47,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16075574] [2021-08-12 19:28:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:47,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16075574] [2021-08-12 19:28:47,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16075574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111955900] [2021-08-12 19:28:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:47,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:47,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:28:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111955900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:47,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 19:28:47,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276492861] [2021-08-12 19:28:47,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:28:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:28:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:28:47,265 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:47,295 INFO L93 Difference]: Finished difference Result 186 states and 359 transitions. [2021-08-12 19:28:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:28:47,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:28:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:47,296 INFO L225 Difference]: With dead ends: 186 [2021-08-12 19:28:47,297 INFO L226 Difference]: Without dead ends: 136 [2021-08-12 19:28:47,297 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:28:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-12 19:28:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-08-12 19:28:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-08-12 19:28:47,303 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2021-08-12 19:28:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:47,303 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-08-12 19:28:47,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-08-12 19:28:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:28:47,304 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:47,316 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:47,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-12 19:28:47,526 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:47,527 INFO L82 PathProgramCache]: Analyzing trace with hash 304168059, now seen corresponding path program 5 times [2021-08-12 19:28:47,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:47,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999212912] [2021-08-12 19:28:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:47,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999212912] [2021-08-12 19:28:47,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999212912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372823595] [2021-08-12 19:28:47,599 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:47,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:28:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:47,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:28:47,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372823595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:47,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-12 19:28:47,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582529138] [2021-08-12 19:28:47,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:28:47,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:47,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:28:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:28:47,749 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:48,197 INFO L93 Difference]: Finished difference Result 380 states and 781 transitions. [2021-08-12 19:28:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:28:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 25 [2021-08-12 19:28:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:48,202 INFO L225 Difference]: With dead ends: 380 [2021-08-12 19:28:48,202 INFO L226 Difference]: Without dead ends: 335 [2021-08-12 19:28:48,204 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:28:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-12 19:28:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 93. [2021-08-12 19:28:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2021-08-12 19:28:48,220 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2021-08-12 19:28:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:48,220 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2021-08-12 19:28:48,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2021-08-12 19:28:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:28:48,224 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:48,224 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:48,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:48,441 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -413112599, now seen corresponding path program 6 times [2021-08-12 19:28:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:48,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650679135] [2021-08-12 19:28:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:48,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650679135] [2021-08-12 19:28:48,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650679135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388738713] [2021-08-12 19:28:48,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:48,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:28:48,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:28:48,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388738713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:48,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:48,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-08-12 19:28:48,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707670873] [2021-08-12 19:28:48,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:28:48,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:28:48,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:28:48,672 INFO L87 Difference]: Start difference. First operand 93 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:49,060 INFO L93 Difference]: Finished difference Result 253 states and 478 transitions. [2021-08-12 19:28:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:28:49,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 25 [2021-08-12 19:28:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:49,062 INFO L225 Difference]: With dead ends: 253 [2021-08-12 19:28:49,062 INFO L226 Difference]: Without dead ends: 236 [2021-08-12 19:28:49,062 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:28:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-12 19:28:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2021-08-12 19:28:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2021-08-12 19:28:49,068 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2021-08-12 19:28:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:49,068 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2021-08-12 19:28:49,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2021-08-12 19:28:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:28:49,068 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:49,069 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:49,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:49,276 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:49,276 INFO L82 PathProgramCache]: Analyzing trace with hash -675082951, now seen corresponding path program 7 times [2021-08-12 19:28:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:49,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492410290] [2021-08-12 19:28:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:49,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:49,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492410290] [2021-08-12 19:28:49,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492410290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:49,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982022173] [2021-08-12 19:28:49,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:49,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982022173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:49,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:49,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-12 19:28:49,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250650490] [2021-08-12 19:28:49,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:28:49,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:28:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:28:49,434 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:49,490 INFO L93 Difference]: Finished difference Result 245 states and 476 transitions. [2021-08-12 19:28:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:28:49,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:28:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:49,491 INFO L225 Difference]: With dead ends: 245 [2021-08-12 19:28:49,491 INFO L226 Difference]: Without dead ends: 189 [2021-08-12 19:28:49,491 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:28:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-12 19:28:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-08-12 19:28:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2021-08-12 19:28:49,499 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2021-08-12 19:28:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:49,499 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2021-08-12 19:28:49,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2021-08-12 19:28:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:28:49,499 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:49,500 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:49,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:28:49,713 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash 199593531, now seen corresponding path program 8 times [2021-08-12 19:28:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:49,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680922015] [2021-08-12 19:28:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:49,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:49,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680922015] [2021-08-12 19:28:49,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680922015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:49,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229365418] [2021-08-12 19:28:49,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:49,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:28:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229365418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:49,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:49,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 19:28:49,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992162875] [2021-08-12 19:28:49,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:28:49,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:49,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:28:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:28:49,975 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:50,772 INFO L93 Difference]: Finished difference Result 577 states and 1191 transitions. [2021-08-12 19:28:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:28:50,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 29 [2021-08-12 19:28:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:50,775 INFO L225 Difference]: With dead ends: 577 [2021-08-12 19:28:50,775 INFO L226 Difference]: Without dead ends: 496 [2021-08-12 19:28:50,776 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 622.5ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:28:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-12 19:28:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 115. [2021-08-12 19:28:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 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) [2021-08-12 19:28:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2021-08-12 19:28:50,785 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2021-08-12 19:28:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:50,785 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2021-08-12 19:28:50,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2021-08-12 19:28:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:28:50,785 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:50,785 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:51,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:51,002 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash -827661843, now seen corresponding path program 9 times [2021-08-12 19:28:51,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:51,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860288354] [2021-08-12 19:28:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:51,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860288354] [2021-08-12 19:28:51,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860288354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87597295] [2021-08-12 19:28:51,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:51,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:28:51,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:51,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:28:51,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:51,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87597295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:51,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:51,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-12 19:28:51,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966294763] [2021-08-12 19:28:51,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:28:51,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:28:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:28:51,263 INFO L87 Difference]: Start difference. First operand 115 states and 226 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 19:28:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:51,971 INFO L93 Difference]: Finished difference Result 365 states and 702 transitions. [2021-08-12 19:28:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:28:51,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 29 [2021-08-12 19:28:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:51,973 INFO L225 Difference]: With dead ends: 365 [2021-08-12 19:28:51,973 INFO L226 Difference]: Without dead ends: 348 [2021-08-12 19:28:51,974 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 599.8ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:28:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-12 19:28:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2021-08-12 19:28:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2021-08-12 19:28:51,983 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2021-08-12 19:28:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:51,984 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2021-08-12 19:28:51,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-12 19:28:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2021-08-12 19:28:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:28:51,984 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:51,984 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:52,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:52,201 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1908010745, now seen corresponding path program 10 times [2021-08-12 19:28:52,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:52,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018142658] [2021-08-12 19:28:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:52,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:52,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018142658] [2021-08-12 19:28:52,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018142658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:52,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331301778] [2021-08-12 19:28:52,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:52,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:52,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:52,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:28:52,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:52,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331301778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:52,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:52,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 19:28:52,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602878173] [2021-08-12 19:28:52,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:28:52,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:52,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:28:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:28:52,350 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:52,434 INFO L93 Difference]: Finished difference Result 304 states and 593 transitions. [2021-08-12 19:28:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:28:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:28:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:52,436 INFO L225 Difference]: With dead ends: 304 [2021-08-12 19:28:52,436 INFO L226 Difference]: Without dead ends: 242 [2021-08-12 19:28:52,436 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:28:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-12 19:28:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-08-12 19:28:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2021-08-12 19:28:52,446 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2021-08-12 19:28:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:52,447 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2021-08-12 19:28:52,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2021-08-12 19:28:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:52,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:52,447 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:52,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 19:28:52,661 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash -556785925, now seen corresponding path program 11 times [2021-08-12 19:28:52,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:52,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745921265] [2021-08-12 19:28:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:52,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:52,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745921265] [2021-08-12 19:28:52,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745921265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:52,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325142091] [2021-08-12 19:28:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:52,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:28:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:53,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325142091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:53,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:53,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-12 19:28:53,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094391653] [2021-08-12 19:28:53,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:28:53,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:28:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:28:53,007 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-08-12 19:28:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:54,156 INFO L93 Difference]: Finished difference Result 802 states and 1657 transitions. [2021-08-12 19:28:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-12 19:28:54,160 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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 33 [2021-08-12 19:28:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:54,162 INFO L225 Difference]: With dead ends: 802 [2021-08-12 19:28:54,162 INFO L226 Difference]: Without dead ends: 679 [2021-08-12 19:28:54,163 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 897.2ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-08-12 19:28:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-08-12 19:28:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 137. [2021-08-12 19:28:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2021-08-12 19:28:54,175 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2021-08-12 19:28:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:54,175 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2021-08-12 19:28:54,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-08-12 19:28:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2021-08-12 19:28:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:54,175 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:54,176 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:54,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:28:54,384 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1177967345, now seen corresponding path program 12 times [2021-08-12 19:28:54,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:54,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2154330] [2021-08-12 19:28:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:54,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:54,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2154330] [2021-08-12 19:28:54,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2154330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:54,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561679448] [2021-08-12 19:28:54,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:54,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:28:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:28:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:54,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561679448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:54,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:54,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-08-12 19:28:54,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791816955] [2021-08-12 19:28:54,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:28:54,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:54,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:28:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:28:54,696 INFO L87 Difference]: Start difference. First operand 137 states and 272 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:55,740 INFO L93 Difference]: Finished difference Result 499 states and 970 transitions. [2021-08-12 19:28:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:28:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 33 [2021-08-12 19:28:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:55,742 INFO L225 Difference]: With dead ends: 499 [2021-08-12 19:28:55,742 INFO L226 Difference]: Without dead ends: 482 [2021-08-12 19:28:55,744 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 842.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-08-12 19:28:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-12 19:28:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2021-08-12 19:28:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2021-08-12 19:28:55,765 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2021-08-12 19:28:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:55,765 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2021-08-12 19:28:55,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2021-08-12 19:28:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:28:55,766 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:55,766 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:55,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:28:55,981 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash 876826553, now seen corresponding path program 13 times [2021-08-12 19:28:55,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:55,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745445151] [2021-08-12 19:28:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:56,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:56,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745445151] [2021-08-12 19:28:56,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745445151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:56,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315187301] [2021-08-12 19:28:56,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:28:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:56,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315187301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:56,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:56,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-12 19:28:56,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787267520] [2021-08-12 19:28:56,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:28:56,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:28:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:28:56,118 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:56,218 INFO L93 Difference]: Finished difference Result 363 states and 710 transitions. [2021-08-12 19:28:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:28:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 35 [2021-08-12 19:28:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:56,220 INFO L225 Difference]: With dead ends: 363 [2021-08-12 19:28:56,220 INFO L226 Difference]: Without dead ends: 295 [2021-08-12 19:28:56,220 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:28:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-12 19:28:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-08-12 19:28:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2021-08-12 19:28:56,236 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2021-08-12 19:28:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:56,237 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2021-08-12 19:28:56,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2021-08-12 19:28:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:28:56,238 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:56,238 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:56,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:56,453 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash -891441477, now seen corresponding path program 14 times [2021-08-12 19:28:56,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:56,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095952380] [2021-08-12 19:28:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:56,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:56,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095952380] [2021-08-12 19:28:56,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095952380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:56,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341400248] [2021-08-12 19:28:56,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:56,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:56,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:56,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:56,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341400248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:56,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:56,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-12 19:28:56,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072674858] [2021-08-12 19:28:56,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:28:56,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:28:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:28:56,845 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2021-08-12 19:28:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:58,509 INFO L93 Difference]: Finished difference Result 1055 states and 2179 transitions. [2021-08-12 19:28:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-12 19:28:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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 37 [2021-08-12 19:28:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:58,512 INFO L225 Difference]: With dead ends: 1055 [2021-08-12 19:28:58,512 INFO L226 Difference]: Without dead ends: 884 [2021-08-12 19:28:58,514 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1250.3ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:28:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-08-12 19:28:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 159. [2021-08-12 19:28:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2021-08-12 19:28:58,530 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2021-08-12 19:28:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:58,530 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2021-08-12 19:28:58,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2021-08-12 19:28:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2021-08-12 19:28:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:28:58,530 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:58,530 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:58,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:28:58,740 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:58,740 INFO L82 PathProgramCache]: Analyzing trace with hash 843829749, now seen corresponding path program 15 times [2021-08-12 19:28:58,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:58,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523569235] [2021-08-12 19:28:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:58,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523569235] [2021-08-12 19:28:58,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523569235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961792138] [2021-08-12 19:28:58,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:58,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 19:28:58,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:58,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:28:58,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:59,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961792138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:59,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:59,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-08-12 19:28:59,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136628897] [2021-08-12 19:28:59,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:59,063 INFO L87 Difference]: Start difference. First operand 159 states and 318 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:00,503 INFO L93 Difference]: Finished difference Result 655 states and 1282 transitions. [2021-08-12 19:29:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-12 19:29:00,504 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 37 [2021-08-12 19:29:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:00,506 INFO L225 Difference]: With dead ends: 655 [2021-08-12 19:29:00,506 INFO L226 Difference]: Without dead ends: 638 [2021-08-12 19:29:00,507 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1189.5ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-08-12 19:29:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-12 19:29:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2021-08-12 19:29:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-08-12 19:29:00,522 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2021-08-12 19:29:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:00,522 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-08-12 19:29:00,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-08-12 19:29:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:29:00,522 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:00,522 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:00,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 19:29:00,737 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1395388281, now seen corresponding path program 16 times [2021-08-12 19:29:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:00,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202700532] [2021-08-12 19:29:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:00,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:00,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202700532] [2021-08-12 19:29:00,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202700532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:00,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308597643] [2021-08-12 19:29:00,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:00,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:29:00,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:00,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:29:00,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:00,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308597643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:00,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:00,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 19:29:00,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996895063] [2021-08-12 19:29:00,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:29:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:29:00,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:29:00,919 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:01,101 INFO L93 Difference]: Finished difference Result 422 states and 827 transitions. [2021-08-12 19:29:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:29:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:29:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:01,103 INFO L225 Difference]: With dead ends: 422 [2021-08-12 19:29:01,103 INFO L226 Difference]: Without dead ends: 348 [2021-08-12 19:29:01,103 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:29:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-12 19:29:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-08-12 19:29:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2021-08-12 19:29:01,123 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2021-08-12 19:29:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:01,123 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2021-08-12 19:29:01,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2021-08-12 19:29:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:29:01,124 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:01,124 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:01,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:01,340 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1201339771, now seen corresponding path program 17 times [2021-08-12 19:29:01,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:01,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100103288] [2021-08-12 19:29:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:01,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:01,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100103288] [2021-08-12 19:29:01,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100103288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:01,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819858897] [2021-08-12 19:29:01,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:01,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:29:01,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:29:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819858897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:01,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:01,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-08-12 19:29:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770303246] [2021-08-12 19:29:01,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-08-12 19:29:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-12 19:29:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:29:01,798 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-08-12 19:29:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:03,956 INFO L93 Difference]: Finished difference Result 1336 states and 2757 transitions. [2021-08-12 19:29:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-12 19:29:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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 41 [2021-08-12 19:29:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:03,960 INFO L225 Difference]: With dead ends: 1336 [2021-08-12 19:29:03,960 INFO L226 Difference]: Without dead ends: 1111 [2021-08-12 19:29:03,962 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 1657.8ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-08-12 19:29:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-08-12 19:29:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 181. [2021-08-12 19:29:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2021-08-12 19:29:03,982 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2021-08-12 19:29:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:03,982 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2021-08-12 19:29:03,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-08-12 19:29:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2021-08-12 19:29:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:29:03,983 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:03,983 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:04,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:04,197 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash -860600583, now seen corresponding path program 18 times [2021-08-12 19:29:04,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:04,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694951452] [2021-08-12 19:29:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:04,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:04,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694951452] [2021-08-12 19:29:04,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694951452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:04,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60405680] [2021-08-12 19:29:04,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:04,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-12 19:29:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:29:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:04,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60405680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:04,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:04,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-08-12 19:29:04,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672059538] [2021-08-12 19:29:04,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:29:04,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:29:04,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:29:04,563 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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) [2021-08-12 19:29:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:06,586 INFO L93 Difference]: Finished difference Result 833 states and 1638 transitions. [2021-08-12 19:29:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-12 19:29:06,586 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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 41 [2021-08-12 19:29:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:06,589 INFO L225 Difference]: With dead ends: 833 [2021-08-12 19:29:06,589 INFO L226 Difference]: Without dead ends: 816 [2021-08-12 19:29:06,591 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 1605.9ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-08-12 19:29:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-08-12 19:29:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2021-08-12 19:29:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2021-08-12 19:29:06,609 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2021-08-12 19:29:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:06,609 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2021-08-12 19:29:06,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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) [2021-08-12 19:29:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2021-08-12 19:29:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:29:06,610 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:06,610 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:06,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:06,825 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:06,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1781494215, now seen corresponding path program 19 times [2021-08-12 19:29:06,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:06,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896595359] [2021-08-12 19:29:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:06,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:06,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896595359] [2021-08-12 19:29:06,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896595359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:06,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95631158] [2021-08-12 19:29:06,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:29:06,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:07,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95631158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:07,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:07,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-12 19:29:07,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138128523] [2021-08-12 19:29:07,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:29:07,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:29:07,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:29:07,011 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:07,212 INFO L93 Difference]: Finished difference Result 481 states and 944 transitions. [2021-08-12 19:29:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:29:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:29:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:07,214 INFO L225 Difference]: With dead ends: 481 [2021-08-12 19:29:07,214 INFO L226 Difference]: Without dead ends: 401 [2021-08-12 19:29:07,214 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:29:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-12 19:29:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2021-08-12 19:29:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2021-08-12 19:29:07,242 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2021-08-12 19:29:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:07,242 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2021-08-12 19:29:07,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2021-08-12 19:29:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 19:29:07,243 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:07,243 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:07,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 19:29:07,459 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2145072325, now seen corresponding path program 20 times [2021-08-12 19:29:07,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:07,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886205746] [2021-08-12 19:29:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:07,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:07,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886205746] [2021-08-12 19:29:07,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886205746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:07,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346086880] [2021-08-12 19:29:07,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:07,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:07,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:29:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:08,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346086880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:08,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:08,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-08-12 19:29:08,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253760971] [2021-08-12 19:29:08,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-08-12 19:29:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-12 19:29:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:29:08,010 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:10,971 INFO L93 Difference]: Finished difference Result 1645 states and 3391 transitions. [2021-08-12 19:29:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-12 19:29:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 19:29:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:10,975 INFO L225 Difference]: With dead ends: 1645 [2021-08-12 19:29:10,975 INFO L226 Difference]: Without dead ends: 1360 [2021-08-12 19:29:10,977 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 2200.1ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-08-12 19:29:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-08-12 19:29:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 203. [2021-08-12 19:29:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2021-08-12 19:29:11,003 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2021-08-12 19:29:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:11,003 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2021-08-12 19:29:11,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2021-08-12 19:29:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 19:29:11,004 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:11,004 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:11,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:29:11,217 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1689827837, now seen corresponding path program 21 times [2021-08-12 19:29:11,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:11,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407454402] [2021-08-12 19:29:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:11,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:11,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407454402] [2021-08-12 19:29:11,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407454402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:11,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747915724] [2021-08-12 19:29:11,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:11,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-12 19:29:11,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:29:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747915724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:11,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:11,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-08-12 19:29:11,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330307316] [2021-08-12 19:29:11,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:29:11,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:29:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:29:11,674 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:14,282 INFO L93 Difference]: Finished difference Result 1033 states and 2038 transitions. [2021-08-12 19:29:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-12 19:29:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 19:29:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:14,286 INFO L225 Difference]: With dead ends: 1033 [2021-08-12 19:29:14,286 INFO L226 Difference]: Without dead ends: 1016 [2021-08-12 19:29:14,287 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2063.4ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-08-12 19:29:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-08-12 19:29:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2021-08-12 19:29:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2021-08-12 19:29:14,311 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2021-08-12 19:29:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:14,311 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2021-08-12 19:29:14,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2021-08-12 19:29:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:29:14,312 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:14,312 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:14,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:14,528 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:14,528 INFO L82 PathProgramCache]: Analyzing trace with hash -753013767, now seen corresponding path program 22 times [2021-08-12 19:29:14,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:14,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362399594] [2021-08-12 19:29:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:14,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362399594] [2021-08-12 19:29:14,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362399594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565519229] [2021-08-12 19:29:14,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:14,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:29:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:29:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:14,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565519229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:14,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:14,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-12 19:29:14,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139002883] [2021-08-12 19:29:14,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:29:14,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:14,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:29:14,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:29:14,714 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:14,967 INFO L93 Difference]: Finished difference Result 540 states and 1061 transitions. [2021-08-12 19:29:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:29:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:29:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:14,969 INFO L225 Difference]: With dead ends: 540 [2021-08-12 19:29:14,969 INFO L226 Difference]: Without dead ends: 454 [2021-08-12 19:29:14,969 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:29:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-12 19:29:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2021-08-12 19:29:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2021-08-12 19:29:15,005 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2021-08-12 19:29:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:15,005 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2021-08-12 19:29:15,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2021-08-12 19:29:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-12 19:29:15,006 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:15,006 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:15,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 19:29:15,222 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:15,222 INFO L82 PathProgramCache]: Analyzing trace with hash -819472389, now seen corresponding path program 23 times [2021-08-12 19:29:15,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:15,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552901753] [2021-08-12 19:29:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:15,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552901753] [2021-08-12 19:29:15,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552901753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505964222] [2021-08-12 19:29:15,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:15,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-12 19:29:15,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:29:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:15,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505964222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:15,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:15,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-08-12 19:29:15,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757552655] [2021-08-12 19:29:15,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 19:29:15,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 19:29:15,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:29:15,891 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:19,858 INFO L93 Difference]: Finished difference Result 1982 states and 4081 transitions. [2021-08-12 19:29:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-12 19:29:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-12 19:29:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:19,870 INFO L225 Difference]: With dead ends: 1982 [2021-08-12 19:29:19,870 INFO L226 Difference]: Without dead ends: 1631 [2021-08-12 19:29:19,872 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 2911.8ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-08-12 19:29:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-08-12 19:29:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 225. [2021-08-12 19:29:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-08-12 19:29:19,903 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2021-08-12 19:29:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:19,903 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-08-12 19:29:19,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-08-12 19:29:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-12 19:29:19,904 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:19,904 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:20,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:20,105 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash 522332929, now seen corresponding path program 24 times [2021-08-12 19:29:20,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:20,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582301058] [2021-08-12 19:29:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:20,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:20,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582301058] [2021-08-12 19:29:20,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582301058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:20,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239373749] [2021-08-12 19:29:20,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:20,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-12 19:29:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:29:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:20,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239373749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:20,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:20,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-08-12 19:29:20,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167048980] [2021-08-12 19:29:20,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 19:29:20,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 19:29:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:29:20,635 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:24,031 INFO L93 Difference]: Finished difference Result 1255 states and 2482 transitions. [2021-08-12 19:29:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-08-12 19:29:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-12 19:29:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:24,035 INFO L225 Difference]: With dead ends: 1255 [2021-08-12 19:29:24,035 INFO L226 Difference]: Without dead ends: 1238 [2021-08-12 19:29:24,036 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8651 ImplicationChecksByTransitivity, 2627.4ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-08-12 19:29:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-08-12 19:29:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2021-08-12 19:29:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2021-08-12 19:29:24,068 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2021-08-12 19:29:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:24,068 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2021-08-12 19:29:24,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2021-08-12 19:29:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-12 19:29:24,068 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:24,068 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:24,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:29:24,284 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:24,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:24,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1838205113, now seen corresponding path program 25 times [2021-08-12 19:29:24,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:24,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441461183] [2021-08-12 19:29:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:24,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:24,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441461183] [2021-08-12 19:29:24,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441461183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:24,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613318826] [2021-08-12 19:29:24,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:29:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:24,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613318826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:24,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:24,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-12 19:29:24,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968443489] [2021-08-12 19:29:24,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:29:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:29:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:29:24,474 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:24,808 INFO L93 Difference]: Finished difference Result 599 states and 1178 transitions. [2021-08-12 19:29:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:29:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-12 19:29:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:24,811 INFO L225 Difference]: With dead ends: 599 [2021-08-12 19:29:24,811 INFO L226 Difference]: Without dead ends: 507 [2021-08-12 19:29:24,825 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:29:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-12 19:29:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2021-08-12 19:29:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2021-08-12 19:29:24,871 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2021-08-12 19:29:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:24,871 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2021-08-12 19:29:24,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2021-08-12 19:29:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-12 19:29:24,872 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:24,872 INFO L550 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:25,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:29:25,088 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:25,088 INFO L82 PathProgramCache]: Analyzing trace with hash 987816891, now seen corresponding path program 26 times [2021-08-12 19:29:25,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:25,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69209746] [2021-08-12 19:29:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:25,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:25,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69209746] [2021-08-12 19:29:25,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69209746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:25,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050729704] [2021-08-12 19:29:25,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:25,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:25,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:29:25,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:25,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050729704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:25,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:25,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-08-12 19:29:25,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178895710] [2021-08-12 19:29:25,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-08-12 19:29:25,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:25,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-12 19:29:25,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:29:25,801 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) [2021-08-12 19:29:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:30,852 INFO L93 Difference]: Finished difference Result 2347 states and 4827 transitions. [2021-08-12 19:29:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-08-12 19:29:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) Word has length 53 [2021-08-12 19:29:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:30,857 INFO L225 Difference]: With dead ends: 2347 [2021-08-12 19:29:30,857 INFO L226 Difference]: Without dead ends: 1924 [2021-08-12 19:29:30,859 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12484 ImplicationChecksByTransitivity, 3576.7ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-08-12 19:29:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-08-12 19:29:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 247. [2021-08-12 19:29:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2021-08-12 19:29:30,901 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2021-08-12 19:29:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:30,901 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2021-08-12 19:29:30,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) [2021-08-12 19:29:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2021-08-12 19:29:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-12 19:29:30,901 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:30,901 INFO L550 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:31,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:29:31,118 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1237739003, now seen corresponding path program 27 times [2021-08-12 19:29:31,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:31,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220440493] [2021-08-12 19:29:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:31,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220440493] [2021-08-12 19:29:31,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220440493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:31,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424852820] [2021-08-12 19:29:31,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:31,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-12 19:29:31,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:29:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:31,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424852820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:31,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:31,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-08-12 19:29:31,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489520513] [2021-08-12 19:29:31,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-08-12 19:29:31,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:31,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-12 19:29:31,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:29:31,673 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:35,967 INFO L93 Difference]: Finished difference Result 1499 states and 2970 transitions. [2021-08-12 19:29:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-08-12 19:29:35,967 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-12 19:29:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:35,972 INFO L225 Difference]: With dead ends: 1499 [2021-08-12 19:29:35,972 INFO L226 Difference]: Without dead ends: 1482 [2021-08-12 19:29:35,973 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12394 ImplicationChecksByTransitivity, 3218.5ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-08-12 19:29:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-08-12 19:29:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2021-08-12 19:29:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2021-08-12 19:29:36,012 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2021-08-12 19:29:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:36,013 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2021-08-12 19:29:36,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2021-08-12 19:29:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 19:29:36,013 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:36,013 INFO L550 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:36,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:36,230 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:36,230 INFO L82 PathProgramCache]: Analyzing trace with hash -818551687, now seen corresponding path program 28 times [2021-08-12 19:29:36,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:36,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952275152] [2021-08-12 19:29:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:36,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952275152] [2021-08-12 19:29:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952275152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149365636] [2021-08-12 19:29:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:36,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:29:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:36,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:29:36,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:36,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149365636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:36,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:36,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-12 19:29:36,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593592109] [2021-08-12 19:29:36,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:29:36,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:29:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:29:36,463 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-08-12 19:29:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:36,903 INFO L93 Difference]: Finished difference Result 658 states and 1295 transitions. [2021-08-12 19:29:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:29:36,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 55 [2021-08-12 19:29:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:36,905 INFO L225 Difference]: With dead ends: 658 [2021-08-12 19:29:36,905 INFO L226 Difference]: Without dead ends: 560 [2021-08-12 19:29:36,906 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:29:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-12 19:29:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2021-08-12 19:29:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2021-08-12 19:29:36,965 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2021-08-12 19:29:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:36,966 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2021-08-12 19:29:36,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-08-12 19:29:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2021-08-12 19:29:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-12 19:29:36,966 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:36,966 INFO L550 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:37,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 19:29:37,183 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash -249778565, now seen corresponding path program 29 times [2021-08-12 19:29:37,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:37,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314094115] [2021-08-12 19:29:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:37,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314094115] [2021-08-12 19:29:37,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314094115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082063210] [2021-08-12 19:29:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:37,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-12 19:29:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:29:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082063210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:37,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:37,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-08-12 19:29:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267530161] [2021-08-12 19:29:37,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-08-12 19:29:37,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-12 19:29:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 19:29:37,977 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) [2021-08-12 19:29:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:44,324 INFO L93 Difference]: Finished difference Result 2740 states and 5629 transitions. [2021-08-12 19:29:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-08-12 19:29:44,324 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) Word has length 57 [2021-08-12 19:29:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:44,331 INFO L225 Difference]: With dead ends: 2740 [2021-08-12 19:29:44,331 INFO L226 Difference]: Without dead ends: 2239 [2021-08-12 19:29:44,333 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17392 ImplicationChecksByTransitivity, 4392.1ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-08-12 19:29:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-08-12 19:29:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 269. [2021-08-12 19:29:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2021-08-12 19:29:44,387 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2021-08-12 19:29:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:44,387 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2021-08-12 19:29:44,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) [2021-08-12 19:29:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2021-08-12 19:29:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-12 19:29:44,388 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:44,388 INFO L550 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:44,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:44,601 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 969410313, now seen corresponding path program 30 times [2021-08-12 19:29:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:44,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659607438] [2021-08-12 19:29:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:44,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:44,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659607438] [2021-08-12 19:29:44,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659607438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:44,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249387494] [2021-08-12 19:29:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:44,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-12 19:29:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:29:44,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249387494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:45,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:45,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-08-12 19:29:45,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731915696] [2021-08-12 19:29:45,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 19:29:45,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 19:29:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:29:45,313 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:50,576 INFO L93 Difference]: Finished difference Result 1765 states and 3502 transitions. [2021-08-12 19:29:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-08-12 19:29:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-12 19:29:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:50,580 INFO L225 Difference]: With dead ends: 1765 [2021-08-12 19:29:50,580 INFO L226 Difference]: Without dead ends: 1748 [2021-08-12 19:29:50,582 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17239 ImplicationChecksByTransitivity, 3949.2ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-08-12 19:29:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-08-12 19:29:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2021-08-12 19:29:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2021-08-12 19:29:50,634 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2021-08-12 19:29:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:50,634 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2021-08-12 19:29:50,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2021-08-12 19:29:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-12 19:29:50,635 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:50,635 INFO L550 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:50,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 19:29:50,835 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:50,836 INFO L82 PathProgramCache]: Analyzing trace with hash -441843911, now seen corresponding path program 31 times [2021-08-12 19:29:50,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:50,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432770102] [2021-08-12 19:29:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:50,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432770102] [2021-08-12 19:29:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432770102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:50,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788235253] [2021-08-12 19:29:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-12 19:29:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:51,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788235253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:51,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:51,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 19:29:51,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062566572] [2021-08-12 19:29:51,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:29:51,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:29:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:29:51,060 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:51,568 INFO L93 Difference]: Finished difference Result 717 states and 1412 transitions. [2021-08-12 19:29:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:29:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-12 19:29:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:51,573 INFO L225 Difference]: With dead ends: 717 [2021-08-12 19:29:51,573 INFO L226 Difference]: Without dead ends: 613 [2021-08-12 19:29:51,574 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:29:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-12 19:29:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-08-12 19:29:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2021-08-12 19:29:51,652 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2021-08-12 19:29:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:51,652 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2021-08-12 19:29:51,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2021-08-12 19:29:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-12 19:29:51,653 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:51,653 INFO L550 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:51,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 19:29:51,865 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1019742149, now seen corresponding path program 32 times [2021-08-12 19:29:51,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:51,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203698264] [2021-08-12 19:29:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:52,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203698264] [2021-08-12 19:29:52,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203698264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:52,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403155816] [2021-08-12 19:29:52,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:29:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:52,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403155816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:52,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:52,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-08-12 19:29:52,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508159353] [2021-08-12 19:29:52,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-08-12 19:29:52,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-12 19:29:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:29:52,865 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:00,884 INFO L93 Difference]: Finished difference Result 3161 states and 6487 transitions. [2021-08-12 19:30:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-08-12 19:30:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-12 19:30:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:00,891 INFO L225 Difference]: With dead ends: 3161 [2021-08-12 19:30:00,891 INFO L226 Difference]: Without dead ends: 2576 [2021-08-12 19:30:00,895 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23637 ImplicationChecksByTransitivity, 5467.4ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-08-12 19:30:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-08-12 19:30:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 291. [2021-08-12 19:30:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-08-12 19:30:00,997 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2021-08-12 19:30:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:00,997 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-08-12 19:30:00,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-08-12 19:30:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-12 19:30:00,998 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:00,998 INFO L550 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:01,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 19:30:01,199 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash -820612595, now seen corresponding path program 33 times [2021-08-12 19:30:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:01,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844117405] [2021-08-12 19:30:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:01,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:01,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844117405] [2021-08-12 19:30:01,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844117405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:01,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762778047] [2021-08-12 19:30:01,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:01,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-12 19:30:01,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:30:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:01,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762778047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:01,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:01,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-08-12 19:30:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056693246] [2021-08-12 19:30:01,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 19:30:01,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 19:30:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:30:01,984 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:09,207 INFO L93 Difference]: Finished difference Result 2053 states and 4078 transitions. [2021-08-12 19:30:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-08-12 19:30:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-12 19:30:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:09,212 INFO L225 Difference]: With dead ends: 2053 [2021-08-12 19:30:09,212 INFO L226 Difference]: Without dead ends: 2036 [2021-08-12 19:30:09,214 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23384 ImplicationChecksByTransitivity, 5128.0ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-08-12 19:30:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-08-12 19:30:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2021-08-12 19:30:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2021-08-12 19:30:09,289 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2021-08-12 19:30:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:09,289 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2021-08-12 19:30:09,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2021-08-12 19:30:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-12 19:30:09,290 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:09,290 INFO L550 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:09,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:30:09,491 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1642473223, now seen corresponding path program 34 times [2021-08-12 19:30:09,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:09,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401345947] [2021-08-12 19:30:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:09,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:09,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401345947] [2021-08-12 19:30:09,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401345947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:09,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455320684] [2021-08-12 19:30:09,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:09,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:30:09,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:09,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-12 19:30:09,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:09,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455320684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:09,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:09,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 19:30:09,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701157174] [2021-08-12 19:30:09,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:30:09,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:30:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:30:09,862 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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) [2021-08-12 19:30:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:10,582 INFO L93 Difference]: Finished difference Result 776 states and 1529 transitions. [2021-08-12 19:30:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:30:10,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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 63 [2021-08-12 19:30:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:10,584 INFO L225 Difference]: With dead ends: 776 [2021-08-12 19:30:10,584 INFO L226 Difference]: Without dead ends: 666 [2021-08-12 19:30:10,584 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:30:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-08-12 19:30:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2021-08-12 19:30:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2021-08-12 19:30:10,681 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2021-08-12 19:30:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:10,681 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2021-08-12 19:30:10,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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) [2021-08-12 19:30:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2021-08-12 19:30:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 19:30:10,682 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:10,682 INFO L550 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:10,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 19:30:10,885 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:10,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1574993669, now seen corresponding path program 35 times [2021-08-12 19:30:10,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:10,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29833206] [2021-08-12 19:30:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:11,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:11,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29833206] [2021-08-12 19:30:11,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29833206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:11,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390188483] [2021-08-12 19:30:11,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:11,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-12 19:30:11,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:30:11,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:11,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390188483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:11,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:11,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-08-12 19:30:11,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416999113] [2021-08-12 19:30:11,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-08-12 19:30:11,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-12 19:30:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 19:30:11,963 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:22,556 INFO L93 Difference]: Finished difference Result 3610 states and 7401 transitions. [2021-08-12 19:30:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-08-12 19:30:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 19:30:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:22,562 INFO L225 Difference]: With dead ends: 3610 [2021-08-12 19:30:22,562 INFO L226 Difference]: Without dead ends: 2935 [2021-08-12 19:30:22,565 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 6808.1ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-08-12 19:30:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-08-12 19:30:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 313. [2021-08-12 19:30:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 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) [2021-08-12 19:30:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2021-08-12 19:30:22,649 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2021-08-12 19:30:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:22,649 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2021-08-12 19:30:22,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2021-08-12 19:30:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 19:30:22,650 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:22,650 INFO L550 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:22,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:30:22,853 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:22,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1894636305, now seen corresponding path program 36 times [2021-08-12 19:30:22,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:22,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107985935] [2021-08-12 19:30:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:23,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:23,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107985935] [2021-08-12 19:30:23,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107985935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:23,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272922376] [2021-08-12 19:30:23,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:23,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-08-12 19:30:23,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:30:23,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:23,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272922376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:23,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:23,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-08-12 19:30:23,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094634205] [2021-08-12 19:30:23,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-08-12 19:30:23,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:23,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-12 19:30:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 19:30:23,658 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:32,315 INFO L93 Difference]: Finished difference Result 2363 states and 4698 transitions. [2021-08-12 19:30:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-08-12 19:30:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 19:30:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:32,319 INFO L225 Difference]: With dead ends: 2363 [2021-08-12 19:30:32,319 INFO L226 Difference]: Without dead ends: 2346 [2021-08-12 19:30:32,321 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31044 ImplicationChecksByTransitivity, 5959.0ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-08-12 19:30:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-08-12 19:30:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2021-08-12 19:30:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2021-08-12 19:30:32,413 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2021-08-12 19:30:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:32,414 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2021-08-12 19:30:32,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2021-08-12 19:30:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-12 19:30:32,414 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:32,414 INFO L550 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:32,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 19:30:32,615 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1631728057, now seen corresponding path program 37 times [2021-08-12 19:30:32,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:32,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627995493] [2021-08-12 19:30:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:32,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:32,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627995493] [2021-08-12 19:30:32,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627995493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:32,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142412108] [2021-08-12 19:30:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:32,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-12 19:30:32,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142412108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:32,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:32,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-08-12 19:30:32,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107548362] [2021-08-12 19:30:32,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:30:32,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:32,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:30:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:30:32,900 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2021-08-12 19:30:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:33,684 INFO L93 Difference]: Finished difference Result 835 states and 1646 transitions. [2021-08-12 19:30:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:30:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) Word has length 67 [2021-08-12 19:30:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:33,687 INFO L225 Difference]: With dead ends: 835 [2021-08-12 19:30:33,687 INFO L226 Difference]: Without dead ends: 719 [2021-08-12 19:30:33,687 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:30:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-08-12 19:30:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2021-08-12 19:30:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2021-08-12 19:30:33,813 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2021-08-12 19:30:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:33,813 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2021-08-12 19:30:33,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2021-08-12 19:30:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2021-08-12 19:30:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-12 19:30:33,814 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:33,814 INFO L550 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:34,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 19:30:34,015 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:34,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:34,015 INFO L82 PathProgramCache]: Analyzing trace with hash 441452731, now seen corresponding path program 38 times [2021-08-12 19:30:34,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:34,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160268496] [2021-08-12 19:30:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:34,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:34,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160268496] [2021-08-12 19:30:34,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160268496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:34,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266908844] [2021-08-12 19:30:34,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:34,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:30:34,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:30:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:35,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266908844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:35,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:35,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-08-12 19:30:35,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940898454] [2021-08-12 19:30:35,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-08-12 19:30:35,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-12 19:30:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-08-12 19:30:35,158 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:47,721 INFO L93 Difference]: Finished difference Result 4087 states and 8371 transitions. [2021-08-12 19:30:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-08-12 19:30:47,722 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-08-12 19:30:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:47,728 INFO L225 Difference]: With dead ends: 4087 [2021-08-12 19:30:47,728 INFO L226 Difference]: Without dead ends: 3316 [2021-08-12 19:30:47,733 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41063 ImplicationChecksByTransitivity, 7985.9ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-08-12 19:30:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-08-12 19:30:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 335. [2021-08-12 19:30:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2021-08-12 19:30:47,840 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2021-08-12 19:30:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:47,841 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2021-08-12 19:30:47,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2021-08-12 19:30:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-12 19:30:47,841 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:47,841 INFO L550 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:48,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:48,057 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1349041643, now seen corresponding path program 39 times [2021-08-12 19:30:48,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:48,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907742122] [2021-08-12 19:30:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:48,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:48,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907742122] [2021-08-12 19:30:48,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907742122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:48,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575064042] [2021-08-12 19:30:48,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:48,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-08-12 19:30:48,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:30:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:49,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575064042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:49,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:49,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-08-12 19:30:49,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897092968] [2021-08-12 19:30:49,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-08-12 19:30:49,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-12 19:30:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:30:49,010 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:30:59,322 INFO L93 Difference]: Finished difference Result 2695 states and 5362 transitions. [2021-08-12 19:30:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-08-12 19:30:59,322 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-08-12 19:30:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:30:59,326 INFO L225 Difference]: With dead ends: 2695 [2021-08-12 19:30:59,326 INFO L226 Difference]: Without dead ends: 2678 [2021-08-12 19:30:59,329 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 7095.3ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-08-12 19:30:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-08-12 19:30:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2021-08-12 19:30:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2021-08-12 19:30:59,434 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2021-08-12 19:30:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:30:59,434 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2021-08-12 19:30:59,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:30:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2021-08-12 19:30:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-12 19:30:59,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:30:59,435 INFO L550 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:30:59,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:59,635 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:30:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:30:59,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1888499335, now seen corresponding path program 40 times [2021-08-12 19:30:59,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:30:59,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841585731] [2021-08-12 19:30:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:30:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:30:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:59,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:30:59,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841585731] [2021-08-12 19:30:59,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841585731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:59,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505889030] [2021-08-12 19:30:59,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:30:59,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:30:59,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:30:59,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-12 19:30:59,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:30:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:30:59,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505889030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:30:59,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:30:59,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 19:30:59,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102851632] [2021-08-12 19:30:59,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:30:59,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:30:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:30:59,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:30:59,939 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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) [2021-08-12 19:31:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:00,858 INFO L93 Difference]: Finished difference Result 894 states and 1763 transitions. [2021-08-12 19:31:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:31:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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 71 [2021-08-12 19:31:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:00,860 INFO L225 Difference]: With dead ends: 894 [2021-08-12 19:31:00,860 INFO L226 Difference]: Without dead ends: 772 [2021-08-12 19:31:00,860 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:31:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-08-12 19:31:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2021-08-12 19:31:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2021-08-12 19:31:01,003 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2021-08-12 19:31:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:01,004 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2021-08-12 19:31:01,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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) [2021-08-12 19:31:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2021-08-12 19:31:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-12 19:31:01,005 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:01,005 INFO L550 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:01,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 19:31:01,212 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:01,212 INFO L82 PathProgramCache]: Analyzing trace with hash -808038533, now seen corresponding path program 41 times [2021-08-12 19:31:01,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:01,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775008193] [2021-08-12 19:31:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:01,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:01,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775008193] [2021-08-12 19:31:01,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775008193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:01,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673215228] [2021-08-12 19:31:01,599 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:01,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-08-12 19:31:01,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:01,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:31:01,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:02,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673215228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:02,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:02,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-08-12 19:31:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315440375] [2021-08-12 19:31:02,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-08-12 19:31:02,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:02,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-12 19:31:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-08-12 19:31:02,468 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:17,555 INFO L93 Difference]: Finished difference Result 4592 states and 9397 transitions. [2021-08-12 19:31:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-08-12 19:31:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-12 19:31:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:17,560 INFO L225 Difference]: With dead ends: 4592 [2021-08-12 19:31:17,561 INFO L226 Difference]: Without dead ends: 3719 [2021-08-12 19:31:17,565 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52751 ImplicationChecksByTransitivity, 9334.8ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-08-12 19:31:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-08-12 19:31:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 357. [2021-08-12 19:31:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2021-08-12 19:31:17,696 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2021-08-12 19:31:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:17,696 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2021-08-12 19:31:17,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2021-08-12 19:31:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-12 19:31:17,697 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:17,697 INFO L550 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:17,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:17,913 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:17,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1893443353, now seen corresponding path program 42 times [2021-08-12 19:31:17,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:17,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871811938] [2021-08-12 19:31:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:18,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:18,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871811938] [2021-08-12 19:31:18,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871811938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:18,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662463345] [2021-08-12 19:31:18,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:18,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-12 19:31:18,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:18,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:31:18,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662463345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:18,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:18,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-08-12 19:31:18,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424459536] [2021-08-12 19:31:18,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-08-12 19:31:18,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-12 19:31:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:31:18,989 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:31,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:31,260 INFO L93 Difference]: Finished difference Result 3049 states and 6070 transitions. [2021-08-12 19:31:31,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-08-12 19:31:31,260 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-12 19:31:31,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:31,264 INFO L225 Difference]: With dead ends: 3049 [2021-08-12 19:31:31,264 INFO L226 Difference]: Without dead ends: 3032 [2021-08-12 19:31:31,268 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51850 ImplicationChecksByTransitivity, 8258.7ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-08-12 19:31:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-08-12 19:31:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2021-08-12 19:31:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2021-08-12 19:31:31,395 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2021-08-12 19:31:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:31,396 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2021-08-12 19:31:31,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2021-08-12 19:31:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 19:31:31,397 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:31,397 INFO L550 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:31,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:31,603 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash -58761159, now seen corresponding path program 43 times [2021-08-12 19:31:31,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:31,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052622812] [2021-08-12 19:31:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:31,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:31,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052622812] [2021-08-12 19:31:31,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052622812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:31,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119925544] [2021-08-12 19:31:31,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-12 19:31:31,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:31,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119925544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:31,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:31,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 19:31:31,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320760879] [2021-08-12 19:31:31,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:31:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:31:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:31:31,949 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:33,035 INFO L93 Difference]: Finished difference Result 953 states and 1880 transitions. [2021-08-12 19:31:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:31:33,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 19:31:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:33,038 INFO L225 Difference]: With dead ends: 953 [2021-08-12 19:31:33,038 INFO L226 Difference]: Without dead ends: 825 [2021-08-12 19:31:33,038 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:31:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-08-12 19:31:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2021-08-12 19:31:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2021-08-12 19:31:33,215 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2021-08-12 19:31:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:33,215 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2021-08-12 19:31:33,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2021-08-12 19:31:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-12 19:31:33,216 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:33,216 INFO L550 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:33,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 19:31:33,417 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash -95480517, now seen corresponding path program 44 times [2021-08-12 19:31:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:33,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205952234] [2021-08-12 19:31:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:33,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:33,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205952234] [2021-08-12 19:31:33,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205952234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:33,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622265561] [2021-08-12 19:31:33,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:33,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:31:33,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:31:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:34,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622265561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:34,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:34,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-08-12 19:31:34,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074524519] [2021-08-12 19:31:34,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-08-12 19:31:34,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:34,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-12 19:31:34,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-08-12 19:31:34,820 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:53,075 INFO L93 Difference]: Finished difference Result 5125 states and 10479 transitions. [2021-08-12 19:31:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-08-12 19:31:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-08-12 19:31:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:53,081 INFO L225 Difference]: With dead ends: 5125 [2021-08-12 19:31:53,081 INFO L226 Difference]: Without dead ends: 4144 [2021-08-12 19:31:53,087 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66790 ImplicationChecksByTransitivity, 10967.6ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-08-12 19:31:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-08-12 19:31:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 379. [2021-08-12 19:31:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2021-08-12 19:31:53,248 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2021-08-12 19:31:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:53,249 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2021-08-12 19:31:53,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2021-08-12 19:31:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-12 19:31:53,249 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:53,249 INFO L550 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:53,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 19:31:53,456 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1341912547, now seen corresponding path program 45 times [2021-08-12 19:31:53,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:53,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802112196] [2021-08-12 19:31:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:53,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:53,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802112196] [2021-08-12 19:31:53,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802112196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:53,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665161031] [2021-08-12 19:31:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:53,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-12 19:31:53,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:53,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:31:53,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665161031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:54,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:54,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-08-12 19:31:54,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027880555] [2021-08-12 19:31:54,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-08-12 19:31:54,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-12 19:31:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:31:54,531 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:09,286 INFO L93 Difference]: Finished difference Result 3425 states and 6822 transitions. [2021-08-12 19:32:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-08-12 19:32:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-08-12 19:32:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:09,292 INFO L225 Difference]: With dead ends: 3425 [2021-08-12 19:32:09,292 INFO L226 Difference]: Without dead ends: 3408 [2021-08-12 19:32:09,296 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65508 ImplicationChecksByTransitivity, 9632.2ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-08-12 19:32:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-08-12 19:32:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2021-08-12 19:32:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 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) [2021-08-12 19:32:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2021-08-12 19:32:09,445 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2021-08-12 19:32:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:09,445 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2021-08-12 19:32:09,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2021-08-12 19:32:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-12 19:32:09,446 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:09,446 INFO L550 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:09,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:32:09,647 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:09,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1809692153, now seen corresponding path program 46 times [2021-08-12 19:32:09,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:09,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232588279] [2021-08-12 19:32:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:09,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:09,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232588279] [2021-08-12 19:32:09,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232588279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:09,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025366972] [2021-08-12 19:32:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:09,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:32:09,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-12 19:32:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:09,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025366972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:09,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:09,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-12 19:32:09,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028638496] [2021-08-12 19:32:09,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:32:09,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:09,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:32:09,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:32:09,987 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-08-12 19:32:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:11,257 INFO L93 Difference]: Finished difference Result 1012 states and 1997 transitions. [2021-08-12 19:32:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:32:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) Word has length 79 [2021-08-12 19:32:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:11,260 INFO L225 Difference]: With dead ends: 1012 [2021-08-12 19:32:11,260 INFO L226 Difference]: Without dead ends: 878 [2021-08-12 19:32:11,261 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:32:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-08-12 19:32:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2021-08-12 19:32:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2021-08-12 19:32:11,471 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2021-08-12 19:32:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:11,471 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2021-08-12 19:32:11,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-08-12 19:32:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2021-08-12 19:32:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-12 19:32:11,472 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:11,472 INFO L550 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:11,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:11,681 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash -521725445, now seen corresponding path program 47 times [2021-08-12 19:32:11,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:11,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884436190] [2021-08-12 19:32:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:12,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884436190] [2021-08-12 19:32:12,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884436190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425945081] [2021-08-12 19:32:12,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:12,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-12 19:32:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:32:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425945081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:13,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:13,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-08-12 19:32:13,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203387970] [2021-08-12 19:32:13,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-08-12 19:32:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-12 19:32:13,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-08-12 19:32:13,284 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:34,954 INFO L93 Difference]: Finished difference Result 5686 states and 11617 transitions. [2021-08-12 19:32:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-08-12 19:32:34,954 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-08-12 19:32:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:34,960 INFO L225 Difference]: With dead ends: 5686 [2021-08-12 19:32:34,961 INFO L226 Difference]: Without dead ends: 4591 [2021-08-12 19:32:34,967 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83479 ImplicationChecksByTransitivity, 12882.5ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-08-12 19:32:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-08-12 19:32:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 401. [2021-08-12 19:32:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 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) [2021-08-12 19:32:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2021-08-12 19:32:35,151 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2021-08-12 19:32:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:35,151 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2021-08-12 19:32:35,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2021-08-12 19:32:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-12 19:32:35,152 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:35,152 INFO L550 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:35,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:32:35,365 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1037658913, now seen corresponding path program 48 times [2021-08-12 19:32:35,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:35,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668411113] [2021-08-12 19:32:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:35,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668411113] [2021-08-12 19:32:35,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668411113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123465097] [2021-08-12 19:32:35,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:35,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-12 19:32:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:35,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:32:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:36,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123465097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:36,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:36,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-08-12 19:32:36,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035729623] [2021-08-12 19:32:36,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-08-12 19:32:36,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:36,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-12 19:32:36,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:32:36,590 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:54,132 INFO L93 Difference]: Finished difference Result 3823 states and 7618 transitions. [2021-08-12 19:32:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-08-12 19:32:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-08-12 19:32:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:54,138 INFO L225 Difference]: With dead ends: 3823 [2021-08-12 19:32:54,138 INFO L226 Difference]: Without dead ends: 3806 [2021-08-12 19:32:54,143 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81705 ImplicationChecksByTransitivity, 11163.7ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-08-12 19:32:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-08-12 19:32:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2021-08-12 19:32:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2021-08-12 19:32:54,327 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2021-08-12 19:32:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:54,327 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2021-08-12 19:32:54,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2021-08-12 19:32:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-12 19:32:54,328 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:54,328 INFO L550 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:54,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:54,528 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash 210209465, now seen corresponding path program 49 times [2021-08-12 19:32:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:54,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006100765] [2021-08-12 19:32:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:54,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:54,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006100765] [2021-08-12 19:32:54,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006100765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:54,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075560837] [2021-08-12 19:32:54,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-12 19:32:54,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:54,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075560837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:54,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:54,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-08-12 19:32:54,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439211] [2021-08-12 19:32:54,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:32:54,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:32:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:32:54,910 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:56,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:56,517 INFO L93 Difference]: Finished difference Result 1071 states and 2114 transitions. [2021-08-12 19:32:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:32:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-08-12 19:32:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:56,520 INFO L225 Difference]: With dead ends: 1071 [2021-08-12 19:32:56,520 INFO L226 Difference]: Without dead ends: 931 [2021-08-12 19:32:56,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:32:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-08-12 19:32:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2021-08-12 19:32:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2021-08-12 19:32:56,766 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2021-08-12 19:32:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:56,767 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2021-08-12 19:32:56,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2021-08-12 19:32:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 19:32:56,768 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:56,768 INFO L550 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:56,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:56,984 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1448811963, now seen corresponding path program 50 times [2021-08-12 19:32:56,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:56,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413800996] [2021-08-12 19:32:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:57,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:57,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413800996] [2021-08-12 19:32:57,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413800996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:57,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149845120] [2021-08-12 19:32:57,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:57,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:32:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:32:57,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:58,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149845120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:58,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:58,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-08-12 19:32:58,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945647812] [2021-08-12 19:32:58,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-08-12 19:32:58,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-12 19:32:58,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-08-12 19:32:58,755 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:24,347 INFO L93 Difference]: Finished difference Result 6275 states and 12811 transitions. [2021-08-12 19:33:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-08-12 19:33:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 19:33:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:24,354 INFO L225 Difference]: With dead ends: 6275 [2021-08-12 19:33:24,354 INFO L226 Difference]: Without dead ends: 5060 [2021-08-12 19:33:24,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103134 ImplicationChecksByTransitivity, 14782.8ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-08-12 19:33:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-08-12 19:33:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 423. [2021-08-12 19:33:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2021-08-12 19:33:24,587 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2021-08-12 19:33:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:24,587 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2021-08-12 19:33:24,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2021-08-12 19:33:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 19:33:24,588 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:24,588 INFO L550 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:24,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-12 19:33:24,797 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2136683995, now seen corresponding path program 51 times [2021-08-12 19:33:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:24,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454633480] [2021-08-12 19:33:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:25,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:25,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454633480] [2021-08-12 19:33:25,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454633480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:25,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146459143] [2021-08-12 19:33:25,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:25,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-12 19:33:25,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:33:25,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:26,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146459143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:26,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:26,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-08-12 19:33:26,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487146310] [2021-08-12 19:33:26,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-08-12 19:33:26,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-12 19:33:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 19:33:26,180 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:46,805 INFO L93 Difference]: Finished difference Result 4243 states and 8458 transitions. [2021-08-12 19:33:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-08-12 19:33:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 19:33:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:46,811 INFO L225 Difference]: With dead ends: 4243 [2021-08-12 19:33:46,811 INFO L226 Difference]: Without dead ends: 4226 [2021-08-12 19:33:46,818 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100738 ImplicationChecksByTransitivity, 12882.5ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-08-12 19:33:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-08-12 19:33:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2021-08-12 19:33:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2021-08-12 19:33:47,073 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2021-08-12 19:33:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:47,073 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2021-08-12 19:33:47,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2021-08-12 19:33:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-12 19:33:47,073 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:47,073 INFO L550 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:47,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:47,274 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:47,274 INFO L82 PathProgramCache]: Analyzing trace with hash -183918983, now seen corresponding path program 52 times [2021-08-12 19:33:47,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:47,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718406647] [2021-08-12 19:33:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:47,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:47,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718406647] [2021-08-12 19:33:47,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718406647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:47,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49184615] [2021-08-12 19:33:47,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:33:47,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-12 19:33:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:47,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49184615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:47,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:47,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-08-12 19:33:47,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821874205] [2021-08-12 19:33:47,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:33:47,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:33:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:47,689 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:49,418 INFO L93 Difference]: Finished difference Result 1130 states and 2231 transitions. [2021-08-12 19:33:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:33:49,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-08-12 19:33:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:49,421 INFO L225 Difference]: With dead ends: 1130 [2021-08-12 19:33:49,421 INFO L226 Difference]: Without dead ends: 984 [2021-08-12 19:33:49,422 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-08-12 19:33:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-08-12 19:33:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2021-08-12 19:33:49,720 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2021-08-12 19:33:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:49,720 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2021-08-12 19:33:49,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2021-08-12 19:33:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-12 19:33:49,721 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:49,721 INFO L550 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:49,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 19:33:49,925 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash 888660091, now seen corresponding path program 53 times [2021-08-12 19:33:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:49,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340592164] [2021-08-12 19:33:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:50,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:50,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340592164] [2021-08-12 19:33:50,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340592164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:50,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260442574] [2021-08-12 19:33:50,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:33:50,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-12 19:33:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:50,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:33:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:51,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260442574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:51,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:51,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-08-12 19:33:51,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585034164] [2021-08-12 19:33:51,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-08-12 19:33:51,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:51,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-12 19:33:51,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-08-12 19:33:51,808 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:22,633 INFO L93 Difference]: Finished difference Result 6892 states and 14061 transitions. [2021-08-12 19:34:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-08-12 19:34:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-08-12 19:34:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:22,641 INFO L225 Difference]: With dead ends: 6892 [2021-08-12 19:34:22,641 INFO L226 Difference]: Without dead ends: 5551 [2021-08-12 19:34:22,650 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126090 ImplicationChecksByTransitivity, 17210.8ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-08-12 19:34:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-08-12 19:34:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 445. [2021-08-12 19:34:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2021-08-12 19:34:22,915 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2021-08-12 19:34:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:22,916 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2021-08-12 19:34:22,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2021-08-12 19:34:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-12 19:34:22,917 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:22,917 INFO L550 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:23,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 19:34:23,126 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash 875505449, now seen corresponding path program 54 times [2021-08-12 19:34:23,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:23,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950181339] [2021-08-12 19:34:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:23,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950181339] [2021-08-12 19:34:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950181339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150305694] [2021-08-12 19:34:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:23,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-08-12 19:34:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:24,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150305694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:24,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:24,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-08-12 19:34:24,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590173503] [2021-08-12 19:34:24,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-08-12 19:34:24,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:24,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-12 19:34:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-08-12 19:34:24,615 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:48,994 INFO L93 Difference]: Finished difference Result 4685 states and 9342 transitions. [2021-08-12 19:34:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-08-12 19:34:48,995 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-08-12 19:34:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:49,001 INFO L225 Difference]: With dead ends: 4685 [2021-08-12 19:34:49,001 INFO L226 Difference]: Without dead ends: 4668 [2021-08-12 19:34:49,008 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122921 ImplicationChecksByTransitivity, 14792.1ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-08-12 19:34:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-08-12 19:34:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2021-08-12 19:34:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2021-08-12 19:34:49,271 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2021-08-12 19:34:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:49,272 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2021-08-12 19:34:49,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2021-08-12 19:34:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-12 19:34:49,272 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:49,272 INFO L550 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:49,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:49,489 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1618955975, now seen corresponding path program 55 times [2021-08-12 19:34:49,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:49,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427763442] [2021-08-12 19:34:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:49,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:49,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427763442] [2021-08-12 19:34:49,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427763442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:49,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079862503] [2021-08-12 19:34:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-12 19:34:49,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079862503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:49,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:49,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-12 19:34:49,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676923915] [2021-08-12 19:34:49,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:34:49,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:49,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:34:49,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:34:49,941 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:52,037 INFO L93 Difference]: Finished difference Result 1189 states and 2348 transitions. [2021-08-12 19:34:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:34:52,038 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-08-12 19:34:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:52,042 INFO L225 Difference]: With dead ends: 1189 [2021-08-12 19:34:52,042 INFO L226 Difference]: Without dead ends: 1037 [2021-08-12 19:34:52,042 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:34:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-08-12 19:34:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2021-08-12 19:34:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2021-08-12 19:34:52,410 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2021-08-12 19:34:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:52,411 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2021-08-12 19:34:52,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2021-08-12 19:34:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-12 19:34:52,411 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:52,412 INFO L550 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:52,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 19:34:52,612 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash -627432901, now seen corresponding path program 56 times [2021-08-12 19:34:52,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:52,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233569255] [2021-08-12 19:34:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:53,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233569255] [2021-08-12 19:34:53,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233569255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753686361] [2021-08-12 19:34:53,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:53,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:53,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:34:53,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:54,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753686361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:54,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:54,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-08-12 19:34:54,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331035769] [2021-08-12 19:34:54,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-08-12 19:34:54,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:54,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-08-12 19:34:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-08-12 19:34:54,654 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:32,800 INFO L93 Difference]: Finished difference Result 7537 states and 15367 transitions. [2021-08-12 19:35:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-08-12 19:35:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-08-12 19:35:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:32,810 INFO L225 Difference]: With dead ends: 7537 [2021-08-12 19:35:32,810 INFO L226 Difference]: Without dead ends: 6064 [2021-08-12 19:35:32,821 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152699 ImplicationChecksByTransitivity, 20157.8ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-08-12 19:35:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-08-12 19:35:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 467. [2021-08-12 19:35:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 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) [2021-08-12 19:35:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2021-08-12 19:35:33,203 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2021-08-12 19:35:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:33,204 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2021-08-12 19:35:33,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2021-08-12 19:35:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-12 19:35:33,205 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:33,205 INFO L550 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:33,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:33,405 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash 700547629, now seen corresponding path program 57 times [2021-08-12 19:35:33,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:33,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789153050] [2021-08-12 19:35:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:33,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:33,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789153050] [2021-08-12 19:35:33,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789153050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:33,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550407091] [2021-08-12 19:35:33,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:33,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-08-12 19:35:33,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:35:33,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:35,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550407091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:35,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:35,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-08-12 19:35:35,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670307576] [2021-08-12 19:35:35,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-08-12 19:35:35,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-12 19:35:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-08-12 19:35:35,016 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:04,262 INFO L93 Difference]: Finished difference Result 5149 states and 10270 transitions. [2021-08-12 19:36:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-08-12 19:36:04,262 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-08-12 19:36:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:04,270 INFO L225 Difference]: With dead ends: 5149 [2021-08-12 19:36:04,270 INFO L226 Difference]: Without dead ends: 5132 [2021-08-12 19:36:04,280 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148584 ImplicationChecksByTransitivity, 16911.6ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-08-12 19:36:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-08-12 19:36:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2021-08-12 19:36:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0794871794871796) internal successors, (811), 390 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2021-08-12 19:36:04,636 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2021-08-12 19:36:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:04,636 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2021-08-12 19:36:04,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2021-08-12 19:36:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 19:36:04,637 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:04,637 INFO L550 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:04,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 19:36:04,841 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1704559353, now seen corresponding path program 58 times [2021-08-12 19:36:04,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:04,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723956062] [2021-08-12 19:36:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:05,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:05,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723956062] [2021-08-12 19:36:05,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723956062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:05,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840560286] [2021-08-12 19:36:05,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:05,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:36:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-12 19:36:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:05,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840560286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:05,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:05,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-12 19:36:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635171489] [2021-08-12 19:36:05,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:36:05,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:36:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:36:05,289 INFO L87 Difference]: Start difference. First operand 391 states and 811 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:07,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:07,673 INFO L93 Difference]: Finished difference Result 1248 states and 2465 transitions. [2021-08-12 19:36:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:36:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 19:36:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:07,678 INFO L225 Difference]: With dead ends: 1248 [2021-08-12 19:36:07,678 INFO L226 Difference]: Without dead ends: 1090 [2021-08-12 19:36:07,678 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:36:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-08-12 19:36:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2021-08-12 19:36:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1575757575757577) internal successors, (1780), 825 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2021-08-12 19:36:08,110 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2021-08-12 19:36:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:08,110 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2021-08-12 19:36:08,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2021-08-12 19:36:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-12 19:36:08,111 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:08,111 INFO L550 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:08,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:08,312 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1532058885, now seen corresponding path program 59 times [2021-08-12 19:36:08,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:08,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717409328] [2021-08-12 19:36:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:08,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:08,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717409328] [2021-08-12 19:36:08,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717409328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:08,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591288055] [2021-08-12 19:36:08,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:09,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-08-12 19:36:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-12 19:36:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:10,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591288055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:10,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:10,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-08-12 19:36:10,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144137959] [2021-08-12 19:36:10,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-08-12 19:36:10,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:10,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-12 19:36:10,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:36:10,548 INFO L87 Difference]: Start difference. First operand 826 states and 1780 transitions. Second operand has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:52,965 INFO L93 Difference]: Finished difference Result 8210 states and 16729 transitions. [2021-08-12 19:36:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-08-12 19:36:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-12 19:36:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:52,976 INFO L225 Difference]: With dead ends: 8210 [2021-08-12 19:36:52,976 INFO L226 Difference]: Without dead ends: 6599 [2021-08-12 19:36:52,989 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183332 ImplicationChecksByTransitivity, 22608.8ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-08-12 19:36:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-08-12 19:36:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 489. [2021-08-12 19:36:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0655737704918034) internal successors, (1008), 488 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2021-08-12 19:36:53,354 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2021-08-12 19:36:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:53,399 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2021-08-12 19:36:53,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2021-08-12 19:36:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-12 19:36:53,400 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:53,400 INFO L550 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:53,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-12 19:36:53,601 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:53,601 INFO L82 PathProgramCache]: Analyzing trace with hash 136633137, now seen corresponding path program 60 times [2021-08-12 19:36:53,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:53,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638120218] [2021-08-12 19:36:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:53,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:53,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638120218] [2021-08-12 19:36:53,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638120218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:53,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309477679] [2021-08-12 19:36:53,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:53,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-08-12 19:36:53,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-12 19:36:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:55,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309477679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:55,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:55,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-08-12 19:36:55,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694583370] [2021-08-12 19:36:55,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-08-12 19:36:55,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:55,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-12 19:36:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 19:36:55,284 INFO L87 Difference]: Start difference. First operand 489 states and 1008 transitions. Second operand has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 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... [2021-08-12 19:37:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-08-12 19:37:20,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:37:20,625 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:37:20,626 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:37:20,628 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:37:20,628 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:37:20 BasicIcfg [2021-08-12 19:37:20,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:37:20,628 INFO L168 Benchmark]: Toolchain (without parser) took 516888.34 ms. Allocated memory was 203.4 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 183.9 MB in the beginning and 318.2 MB in the end (delta: -134.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-12 19:37:20,628 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory was 185.0 MB in the beginning and 184.9 MB in the end (delta: 141.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:37:20,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.66 ms. Allocated memory is still 203.4 MB. Free memory was 183.8 MB in the beginning and 182.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:37:20,629 INFO L168 Benchmark]: Boogie Preprocessor took 14.34 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 181.5 MB in the end (delta: 862.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:37:20,629 INFO L168 Benchmark]: RCFGBuilder took 248.60 ms. Allocated memory is still 203.4 MB. Free memory was 181.3 MB in the beginning and 169.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-12 19:37:20,629 INFO L168 Benchmark]: TraceAbstraction took 516601.00 ms. Allocated memory was 203.4 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 169.3 MB in the beginning and 318.2 MB in the end (delta: -149.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-12 19:37:20,629 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 0.11 ms. Allocated memory is still 203.4 MB. Free memory was 185.0 MB in the beginning and 184.9 MB in the end (delta: 141.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.66 ms. Allocated memory is still 203.4 MB. Free memory was 183.8 MB in the beginning and 182.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.34 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 181.5 MB in the end (delta: 862.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 248.60 ms. Allocated memory is still 203.4 MB. Free memory was 181.3 MB in the beginning and 169.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 516601.00 ms. Allocated memory was 203.4 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 169.3 MB in the beginning and 318.2 MB in the end (delta: -149.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (489states) and FLOYD_HOARE automaton (currently 442 states, 69 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 507 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 516478.9ms, OverallIterations: 63, TraceHistogramMax: 21, EmptinessCheckTime: 46.1ms, AutomataDifference: 455020.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4748 SDtfs, 32613 SDslu, 75352 SDs, 0 SdLazy, 80843 SolverSat, 4280 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35269.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13411 GetRequests, 2957 SyntacticMatches, 40 SemanticMatches, 10413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766060 ImplicationChecksByTransitivity, 271764.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=826occurred in iteration=61, InterpolantAutomatonStates: 8398, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6394.2ms AutomataMinimizationTime, 62 MinimizatonAttempts, 87747 StatesRemovedByMinimization, 62 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 307.7ms SsaConstructionTime, 1318.8ms SatisfiabilityAnalysisTime, 38711.2ms InterpolantComputationTime, 7066 NumberOfCodeBlocks, 7066 NumberOfCodeBlocksAsserted, 523 NumberOfCheckSat, 6942 ConstructedInterpolants, 0 QuantifiedInterpolants, 56184 SizeOfPredicates, 184 NumberOfNonLiveVariables, 8904 ConjunctsInSsa, 1945 ConjunctsInUnsatCore, 124 InterpolantComputations, 2 PerfectInterpolantSequences, 11941/36203 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