/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/POPL2022/add-sub03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8b99979fc9bd30b823d307a67cb055caa4790482-8b99979 [2021-06-30 11:47:30,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-30 11:47:30,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-30 11:47:30,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-30 11:47:30,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-30 11:47:30,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-30 11:47:30,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-30 11:47:30,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-30 11:47:30,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-30 11:47:30,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-30 11:47:30,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-30 11:47:30,938 INFO L138 SettingsManager]: * Use SBE=true [2021-06-30 11:47:30,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-30 11:47:30,938 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-30 11:47:30,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-30 11:47:30,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-30 11:47:30,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-30 11:47:30,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-30 11:47:30,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-30 11:47:30,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-30 11:47:30,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-30 11:47:30,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:47:30,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-30 11:47:30,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-30 11:47:30,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-30 11:47:30,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-30 11:47:30,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-30 11:47:30,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-30 11:47:30,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-30 11:47:30,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-30 11:47:31,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-30 11:47:31,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-30 11:47:31,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-30 11:47:31,444 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-30 11:47:31,449 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-30 11:47:31,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub03.bpl [2021-06-30 11:47:31,460 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub03.bpl' [2021-06-30 11:47:31,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-30 11:47:31,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-30 11:47:31,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-30 11:47:31,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-30 11:47:31,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-30 11:47:31,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-30 11:47:31,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-30 11:47:31,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-30 11:47:31,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-30 11:47:31,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... [2021-06-30 11:47:31,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-30 11:47:31,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-30 11:47:31,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-30 11:47:31,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-30 11:47:31,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:47:31,650 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-30 11:47:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-30 11:47:31,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-30 11:47:31,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-06-30 11:47:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-06-30 11:47:31,665 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-06-30 11:47:31,666 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-30 11:47:31,756 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-30 11:47:31,756 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-30 11:47:31,757 INFO L202 PluginConnector]: Adding new model add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:47:31 BoogieIcfgContainer [2021-06-30 11:47:31,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-30 11:47:31,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-30 11:47:31,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-30 11:47:31,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-30 11:47:31,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:47:31" (1/2) ... [2021-06-30 11:47:31,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1554c875 and model type add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.06 11:47:31, skipping insertion in model container [2021-06-30 11:47:31,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:47:31" (2/2) ... [2021-06-30 11:47:31,762 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub03.bpl [2021-06-30 11:47:31,765 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-30 11:47:31,765 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-30 11:47:31,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-30 11:47:31,766 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-30 11:47:31,782 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,782 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,782 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,782 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,783 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,783 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,783 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,783 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,783 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,784 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,784 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,784 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,784 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,784 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,784 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,785 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,785 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,785 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,786 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,789 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,791 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 11:47:31,796 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-30 11:47:31,839 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-30 11:47:31,863 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-30 11:47:31,863 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-30 11:47:31,863 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-30 11:47:31,863 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-30 11:47:31,863 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-30 11:47:31,863 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-30 11:47:31,863 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-30 11:47:31,863 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-30 11:47:31,873 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-30 11:47:31,915 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-30 11:47:31,926 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:31,927 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:31,927 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1166539808, now seen corresponding path program 1 times [2021-06-30 11:47:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:31,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136941409] [2021-06-30 11:47:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:32,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136941409] [2021-06-30 11:47:32,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136941409] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:32,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:32,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-30 11:47:32,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961874608] [2021-06-30 11:47:32,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-30 11:47:32,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-30 11:47:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:47:32,076 INFO L87 Difference]: Start difference. First operand has 110 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 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, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,137 INFO L93 Difference]: Finished difference Result 160 states and 456 transitions. [2021-06-30 11:47:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-30 11:47:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-30 11:47:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,147 INFO L225 Difference]: With dead ends: 160 [2021-06-30 11:47:32,147 INFO L226 Difference]: Without dead ends: 156 [2021-06-30 11:47:32,148 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:47:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-30 11:47:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 125. [2021-06-30 11:47:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.870967741935484) internal successors, (356), 124 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 356 transitions. [2021-06-30 11:47:32,200 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 356 transitions. Word has length 11 [2021-06-30 11:47:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:32,200 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 356 transitions. [2021-06-30 11:47:32,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 356 transitions. [2021-06-30 11:47:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-30 11:47:32,202 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:32,202 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:32,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-30 11:47:32,203 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:32,203 INFO L82 PathProgramCache]: Analyzing trace with hash 205365610, now seen corresponding path program 1 times [2021-06-30 11:47:32,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:32,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685539556] [2021-06-30 11:47:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:32,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685539556] [2021-06-30 11:47:32,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685539556] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:32,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:32,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:32,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439651955] [2021-06-30 11:47:32,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:32,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:32,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:32,300 INFO L87 Difference]: Start difference. First operand 125 states and 356 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,328 INFO L93 Difference]: Finished difference Result 186 states and 534 transitions. [2021-06-30 11:47:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-30 11:47:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,330 INFO L225 Difference]: With dead ends: 186 [2021-06-30 11:47:32,330 INFO L226 Difference]: Without dead ends: 178 [2021-06-30 11:47:32,331 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-30 11:47:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2021-06-30 11:47:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8931297709923665) internal successors, (379), 131 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 379 transitions. [2021-06-30 11:47:32,343 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 379 transitions. Word has length 14 [2021-06-30 11:47:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:32,343 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 379 transitions. [2021-06-30 11:47:32,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 379 transitions. [2021-06-30 11:47:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-30 11:47:32,344 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:32,344 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:32,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-30 11:47:32,345 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1769591164, now seen corresponding path program 1 times [2021-06-30 11:47:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:32,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95445078] [2021-06-30 11:47:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:32,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95445078] [2021-06-30 11:47:32,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95445078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:32,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:32,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:32,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754646134] [2021-06-30 11:47:32,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:32,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:32,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:32,385 INFO L87 Difference]: Start difference. First operand 132 states and 379 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,411 INFO L93 Difference]: Finished difference Result 210 states and 603 transitions. [2021-06-30 11:47:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-30 11:47:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,413 INFO L225 Difference]: With dead ends: 210 [2021-06-30 11:47:32,413 INFO L226 Difference]: Without dead ends: 193 [2021-06-30 11:47:32,413 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-30 11:47:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2021-06-30 11:47:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9276315789473686) internal successors, (445), 152 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 445 transitions. [2021-06-30 11:47:32,423 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 445 transitions. Word has length 14 [2021-06-30 11:47:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:32,423 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 445 transitions. [2021-06-30 11:47:32,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 445 transitions. [2021-06-30 11:47:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-30 11:47:32,429 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:32,429 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:32,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-30 11:47:32,429 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:32,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1548731818, now seen corresponding path program 1 times [2021-06-30 11:47:32,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:32,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328338948] [2021-06-30 11:47:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:32,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328338948] [2021-06-30 11:47:32,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328338948] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:32,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:32,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:47:32,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849689950] [2021-06-30 11:47:32,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:47:32,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:47:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:32,486 INFO L87 Difference]: Start difference. First operand 153 states and 445 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,509 INFO L93 Difference]: Finished difference Result 232 states and 674 transitions. [2021-06-30 11:47:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:47:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-30 11:47:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,511 INFO L225 Difference]: With dead ends: 232 [2021-06-30 11:47:32,511 INFO L226 Difference]: Without dead ends: 220 [2021-06-30 11:47:32,511 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:47:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-30 11:47:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 176. [2021-06-30 11:47:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9657142857142857) internal successors, (519), 175 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 519 transitions. [2021-06-30 11:47:32,521 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 519 transitions. Word has length 14 [2021-06-30 11:47:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:32,521 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 519 transitions. [2021-06-30 11:47:32,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 519 transitions. [2021-06-30 11:47:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:32,522 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:32,522 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:32,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-30 11:47:32,523 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:32,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1976020978, now seen corresponding path program 1 times [2021-06-30 11:47:32,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:32,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757140615] [2021-06-30 11:47:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:32,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757140615] [2021-06-30 11:47:32,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757140615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:32,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:32,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:32,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613933395] [2021-06-30 11:47:32,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:32,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:32,572 INFO L87 Difference]: Start difference. First operand 176 states and 519 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,608 INFO L93 Difference]: Finished difference Result 253 states and 736 transitions. [2021-06-30 11:47:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-30 11:47:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,610 INFO L225 Difference]: With dead ends: 253 [2021-06-30 11:47:32,610 INFO L226 Difference]: Without dead ends: 232 [2021-06-30 11:47:32,611 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-30 11:47:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-06-30 11:47:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-06-30 11:47:32,624 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 17 [2021-06-30 11:47:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:32,625 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-06-30 11:47:32,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-06-30 11:47:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:32,626 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:32,626 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:32,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-30 11:47:32,626 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1342302004, now seen corresponding path program 1 times [2021-06-30 11:47:32,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:32,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760852619] [2021-06-30 11:47:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:32,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760852619] [2021-06-30 11:47:32,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760852619] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:32,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:32,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:32,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113344132] [2021-06-30 11:47:32,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:32,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:32,713 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,741 INFO L93 Difference]: Finished difference Result 272 states and 794 transitions. [2021-06-30 11:47:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-30 11:47:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,743 INFO L225 Difference]: With dead ends: 272 [2021-06-30 11:47:32,743 INFO L226 Difference]: Without dead ends: 256 [2021-06-30 11:47:32,744 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-30 11:47:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 190. [2021-06-30 11:47:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9576719576719577) internal successors, (559), 189 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 559 transitions. [2021-06-30 11:47:32,751 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 559 transitions. Word has length 17 [2021-06-30 11:47:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:32,751 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 559 transitions. [2021-06-30 11:47:32,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 559 transitions. [2021-06-30 11:47:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:32,752 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:32,752 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:32,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-30 11:47:32,756 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1263591790, now seen corresponding path program 2 times [2021-06-30 11:47:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:32,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48422133] [2021-06-30 11:47:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:32,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48422133] [2021-06-30 11:47:32,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48422133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095361941] [2021-06-30 11:47:32,824 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:32,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:32,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:32,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095361941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:32,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:32,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:32,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447160692] [2021-06-30 11:47:32,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:32,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:32,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:32,943 INFO L87 Difference]: Start difference. First operand 190 states and 559 transitions. Second operand has 6 states, 5 states have (on average 3.4) 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) [2021-06-30 11:47:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:32,994 INFO L93 Difference]: Finished difference Result 270 states and 790 transitions. [2021-06-30 11:47:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) 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 [2021-06-30 11:47:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:32,996 INFO L225 Difference]: With dead ends: 270 [2021-06-30 11:47:32,996 INFO L226 Difference]: Without dead ends: 234 [2021-06-30 11:47:32,996 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-30 11:47:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 180. [2021-06-30 11:47:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9385474860335195) internal successors, (526), 179 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 526 transitions. [2021-06-30 11:47:33,008 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 526 transitions. Word has length 17 [2021-06-30 11:47:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:33,008 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 526 transitions. [2021-06-30 11:47:33,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) 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) [2021-06-30 11:47:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 526 transitions. [2021-06-30 11:47:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:33,010 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:33,010 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:33,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-30 11:47:33,230 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1412545558, now seen corresponding path program 2 times [2021-06-30 11:47:33,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:33,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279806790] [2021-06-30 11:47:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:33,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279806790] [2021-06-30 11:47:33,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279806790] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:33,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:33,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:33,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502121826] [2021-06-30 11:47:33,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:33,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:33,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:33,278 INFO L87 Difference]: Start difference. First operand 180 states and 526 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:33,314 INFO L93 Difference]: Finished difference Result 265 states and 773 transitions. [2021-06-30 11:47:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-30 11:47:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:33,316 INFO L225 Difference]: With dead ends: 265 [2021-06-30 11:47:33,316 INFO L226 Difference]: Without dead ends: 258 [2021-06-30 11:47:33,317 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-30 11:47:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 216. [2021-06-30 11:47:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.013953488372093) internal successors, (648), 215 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-06-30 11:47:33,325 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 17 [2021-06-30 11:47:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:33,326 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-06-30 11:47:33,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-06-30 11:47:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:33,327 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:33,327 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:33,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-30 11:47:33,327 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1397084762, now seen corresponding path program 3 times [2021-06-30 11:47:33,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:33,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110740229] [2021-06-30 11:47:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:33,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:33,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110740229] [2021-06-30 11:47:33,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110740229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:33,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446419360] [2021-06-30 11:47:33,410 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:33,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:33,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:33,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446419360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:33,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:33,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:33,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906430452] [2021-06-30 11:47:33,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:33,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:33,556 INFO L87 Difference]: Start difference. First operand 216 states and 648 transitions. Second operand has 6 states, 5 states have (on average 3.4) 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) [2021-06-30 11:47:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:33,657 INFO L93 Difference]: Finished difference Result 287 states and 853 transitions. [2021-06-30 11:47:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:33,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) 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 [2021-06-30 11:47:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:33,659 INFO L225 Difference]: With dead ends: 287 [2021-06-30 11:47:33,659 INFO L226 Difference]: Without dead ends: 242 [2021-06-30 11:47:33,659 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-30 11:47:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 158. [2021-06-30 11:47:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-06-30 11:47:33,670 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-06-30 11:47:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:33,670 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-06-30 11:47:33,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) 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) [2021-06-30 11:47:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-06-30 11:47:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:33,671 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:33,671 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:33,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:33,901 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:33,902 INFO L82 PathProgramCache]: Analyzing trace with hash -509133734, now seen corresponding path program 1 times [2021-06-30 11:47:33,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:33,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292256337] [2021-06-30 11:47:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:34,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292256337] [2021-06-30 11:47:34,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292256337] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:34,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675709180] [2021-06-30 11:47:34,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:34,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:34,008 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,042 INFO L93 Difference]: Finished difference Result 278 states and 807 transitions. [2021-06-30 11:47:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-30 11:47:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,047 INFO L225 Difference]: With dead ends: 278 [2021-06-30 11:47:34,047 INFO L226 Difference]: Without dead ends: 253 [2021-06-30 11:47:34,047 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-30 11:47:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 208. [2021-06-30 11:47:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-06-30 11:47:34,053 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 17 [2021-06-30 11:47:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,053 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-06-30 11:47:34,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-06-30 11:47:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:34,054 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,054 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-30 11:47:34,054 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1232204950, now seen corresponding path program 2 times [2021-06-30 11:47:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460151172] [2021-06-30 11:47:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:34,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460151172] [2021-06-30 11:47:34,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460151172] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 11:47:34,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277798636] [2021-06-30 11:47:34,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:47:34,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:47:34,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:34,102 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,137 INFO L93 Difference]: Finished difference Result 294 states and 861 transitions. [2021-06-30 11:47:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:47:34,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-30 11:47:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,140 INFO L225 Difference]: With dead ends: 294 [2021-06-30 11:47:34,140 INFO L226 Difference]: Without dead ends: 281 [2021-06-30 11:47:34,140 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:47:34,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-30 11:47:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 249. [2021-06-30 11:47:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.0) internal successors, (744), 248 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 744 transitions. [2021-06-30 11:47:34,146 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 744 transitions. Word has length 17 [2021-06-30 11:47:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,146 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 744 transitions. [2021-06-30 11:47:34,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 744 transitions. [2021-06-30 11:47:34,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:47:34,147 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,147 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-30 11:47:34,147 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,147 INFO L82 PathProgramCache]: Analyzing trace with hash -216826942, now seen corresponding path program 3 times [2021-06-30 11:47:34,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837355121] [2021-06-30 11:47:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:34,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837355121] [2021-06-30 11:47:34,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837355121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:34,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25914827] [2021-06-30 11:47:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:34,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:34,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:34,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:47:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:34,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25914827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:34,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:34,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:34,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684638935] [2021-06-30 11:47:34,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:34,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:34,271 INFO L87 Difference]: Start difference. First operand 249 states and 744 transitions. Second operand has 6 states, 5 states have (on average 3.4) 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) [2021-06-30 11:47:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,336 INFO L93 Difference]: Finished difference Result 335 states and 992 transitions. [2021-06-30 11:47:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) 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 [2021-06-30 11:47:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,338 INFO L225 Difference]: With dead ends: 335 [2021-06-30 11:47:34,338 INFO L226 Difference]: Without dead ends: 248 [2021-06-30 11:47:34,339 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-30 11:47:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2021-06-30 11:47:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-30 11:47:34,343 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 17 [2021-06-30 11:47:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,343 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-30 11:47:34,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) 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) [2021-06-30 11:47:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-30 11:47:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:34,345 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,345 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-30 11:47:34,560 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1151712732, now seen corresponding path program 1 times [2021-06-30 11:47:34,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008570428] [2021-06-30 11:47:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:47:34,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008570428] [2021-06-30 11:47:34,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008570428] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:47:34,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023025954] [2021-06-30 11:47:34,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:34,612 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,667 INFO L93 Difference]: Finished difference Result 332 states and 971 transitions. [2021-06-30 11:47:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:34,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,669 INFO L225 Difference]: With dead ends: 332 [2021-06-30 11:47:34,670 INFO L226 Difference]: Without dead ends: 303 [2021-06-30 11:47:34,670 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-30 11:47:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 273. [2021-06-30 11:47:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0294117647058822) internal successors, (824), 272 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) [2021-06-30 11:47:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 824 transitions. [2021-06-30 11:47:34,675 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 824 transitions. Word has length 20 [2021-06-30 11:47:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,675 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 824 transitions. [2021-06-30 11:47:34,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 824 transitions. [2021-06-30 11:47:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:34,677 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,677 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-30 11:47:34,677 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash 589625952, now seen corresponding path program 2 times [2021-06-30 11:47:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706543622] [2021-06-30 11:47:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:47:34,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706543622] [2021-06-30 11:47:34,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706543622] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:34,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:34,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:47:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670566442] [2021-06-30 11:47:34,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:34,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:34,735 INFO L87 Difference]: Start difference. First operand 273 states and 824 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:34,785 INFO L93 Difference]: Finished difference Result 391 states and 1167 transitions. [2021-06-30 11:47:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:34,787 INFO L225 Difference]: With dead ends: 391 [2021-06-30 11:47:34,787 INFO L226 Difference]: Without dead ends: 374 [2021-06-30 11:47:34,787 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-30 11:47:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 346. [2021-06-30 11:47:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.0898550724637683) internal successors, (1066), 345 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1066 transitions. [2021-06-30 11:47:34,795 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1066 transitions. Word has length 20 [2021-06-30 11:47:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:34,795 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1066 transitions. [2021-06-30 11:47:34,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1066 transitions. [2021-06-30 11:47:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:34,796 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:34,796 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:34,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-30 11:47:34,796 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash -859405940, now seen corresponding path program 3 times [2021-06-30 11:47:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:34,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712082796] [2021-06-30 11:47:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:34,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:34,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712082796] [2021-06-30 11:47:34,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712082796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:34,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981440292] [2021-06-30 11:47:34,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:34,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:34,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:34,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981440292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:34,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:34,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:34,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782937588] [2021-06-30 11:47:34,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:34,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:34,957 INFO L87 Difference]: Start difference. First operand 346 states and 1066 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:35,024 INFO L93 Difference]: Finished difference Result 429 states and 1304 transitions. [2021-06-30 11:47:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:35,026 INFO L225 Difference]: With dead ends: 429 [2021-06-30 11:47:35,026 INFO L226 Difference]: Without dead ends: 338 [2021-06-30 11:47:35,026 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-30 11:47:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 219. [2021-06-30 11:47:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.967889908256881) internal successors, (647), 218 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 647 transitions. [2021-06-30 11:47:35,031 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 647 transitions. Word has length 20 [2021-06-30 11:47:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:35,031 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 647 transitions. [2021-06-30 11:47:35,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 647 transitions. [2021-06-30 11:47:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:35,032 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:35,032 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:35,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:35,251 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash -628633368, now seen corresponding path program 4 times [2021-06-30 11:47:35,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:35,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519358569] [2021-06-30 11:47:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:35,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:35,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519358569] [2021-06-30 11:47:35,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519358569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:35,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635483497] [2021-06-30 11:47:35,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:35,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:35,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:35,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:35,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635483497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:35,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:35,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:35,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842965740] [2021-06-30 11:47:35,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:35,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:35,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:35,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:35,384 INFO L87 Difference]: Start difference. First operand 219 states and 647 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:35,448 INFO L93 Difference]: Finished difference Result 332 states and 980 transitions. [2021-06-30 11:47:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:35,450 INFO L225 Difference]: With dead ends: 332 [2021-06-30 11:47:35,450 INFO L226 Difference]: Without dead ends: 288 [2021-06-30 11:47:35,451 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-30 11:47:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 240. [2021-06-30 11:47:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.01255230125523) internal successors, (720), 239 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 720 transitions. [2021-06-30 11:47:35,455 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 720 transitions. Word has length 20 [2021-06-30 11:47:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:35,455 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 720 transitions. [2021-06-30 11:47:35,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 720 transitions. [2021-06-30 11:47:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:35,456 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:35,456 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:35,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-30 11:47:35,672 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1112705316, now seen corresponding path program 5 times [2021-06-30 11:47:35,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:35,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889896431] [2021-06-30 11:47:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:35,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889896431] [2021-06-30 11:47:35,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889896431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659095104] [2021-06-30 11:47:35,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:35,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:35,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:35,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659095104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:35,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:35,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422149422] [2021-06-30 11:47:35,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:35,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:35,842 INFO L87 Difference]: Start difference. First operand 240 states and 720 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:35,903 INFO L93 Difference]: Finished difference Result 399 states and 1203 transitions. [2021-06-30 11:47:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:35,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:35,905 INFO L225 Difference]: With dead ends: 399 [2021-06-30 11:47:35,905 INFO L226 Difference]: Without dead ends: 366 [2021-06-30 11:47:35,905 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-30 11:47:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 355. [2021-06-30 11:47:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.073446327683616) internal successors, (1088), 354 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1088 transitions. [2021-06-30 11:47:35,912 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1088 transitions. Word has length 20 [2021-06-30 11:47:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:35,912 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1088 transitions. [2021-06-30 11:47:35,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1088 transitions. [2021-06-30 11:47:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:35,913 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:35,913 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:36,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-30 11:47:36,139 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:36,154 INFO L82 PathProgramCache]: Analyzing trace with hash -336326576, now seen corresponding path program 6 times [2021-06-30 11:47:36,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:36,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588907342] [2021-06-30 11:47:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:36,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:36,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588907342] [2021-06-30 11:47:36,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588907342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:36,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172277480] [2021-06-30 11:47:36,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:36,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-30 11:47:36,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:36,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:36,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172277480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:36,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:36,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:36,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646036842] [2021-06-30 11:47:36,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:36,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:36,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:36,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:36,343 INFO L87 Difference]: Start difference. First operand 355 states and 1088 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:36,416 INFO L93 Difference]: Finished difference Result 436 states and 1325 transitions. [2021-06-30 11:47:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:36,417 INFO L225 Difference]: With dead ends: 436 [2021-06-30 11:47:36,417 INFO L226 Difference]: Without dead ends: 335 [2021-06-30 11:47:36,417 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-30 11:47:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 176. [2021-06-30 11:47:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9257142857142857) internal successors, (512), 175 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 512 transitions. [2021-06-30 11:47:36,421 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 512 transitions. Word has length 20 [2021-06-30 11:47:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:36,422 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 512 transitions. [2021-06-30 11:47:36,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,422 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 512 transitions. [2021-06-30 11:47:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:36,422 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:36,422 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:36,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-30 11:47:36,637 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1214601052, now seen corresponding path program 7 times [2021-06-30 11:47:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:36,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935066000] [2021-06-30 11:47:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-30 11:47:36,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:36,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935066000] [2021-06-30 11:47:36,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935066000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:47:36,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:47:36,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 11:47:36,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757134931] [2021-06-30 11:47:36,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:36,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:36,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:36,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:36,680 INFO L87 Difference]: Start difference. First operand 176 states and 512 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:36,734 INFO L93 Difference]: Finished difference Result 293 states and 857 transitions. [2021-06-30 11:47:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:36,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:36,736 INFO L225 Difference]: With dead ends: 293 [2021-06-30 11:47:36,736 INFO L226 Difference]: Without dead ends: 286 [2021-06-30 11:47:36,736 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-30 11:47:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 259. [2021-06-30 11:47:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.011627906976744) internal successors, (777), 258 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 777 transitions. [2021-06-30 11:47:36,741 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 777 transitions. Word has length 20 [2021-06-30 11:47:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:36,741 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 777 transitions. [2021-06-30 11:47:36,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 777 transitions. [2021-06-30 11:47:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:36,742 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:36,742 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:36,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-30 11:47:36,742 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:36,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:36,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1230061848, now seen corresponding path program 8 times [2021-06-30 11:47:36,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:36,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93641812] [2021-06-30 11:47:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:36,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:36,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93641812] [2021-06-30 11:47:36,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93641812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:36,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805598720] [2021-06-30 11:47:36,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:36,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:36,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805598720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:36,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:36,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:36,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679060064] [2021-06-30 11:47:36,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:36,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:36,835 INFO L87 Difference]: Start difference. First operand 259 states and 777 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:36,909 INFO L93 Difference]: Finished difference Result 352 states and 1051 transitions. [2021-06-30 11:47:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:36,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:36,910 INFO L225 Difference]: With dead ends: 352 [2021-06-30 11:47:36,910 INFO L226 Difference]: Without dead ends: 307 [2021-06-30 11:47:36,910 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-30 11:47:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 201. [2021-06-30 11:47:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-06-30 11:47:36,915 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 20 [2021-06-30 11:47:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:36,915 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-06-30 11:47:36,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-06-30 11:47:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:36,915 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:36,915 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:37,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:37,132 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 536113892, now seen corresponding path program 9 times [2021-06-30 11:47:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:37,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652718907] [2021-06-30 11:47:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:37,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:37,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652718907] [2021-06-30 11:47:37,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652718907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:37,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338174996] [2021-06-30 11:47:37,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:37,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:37,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:37,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:37,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338174996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:37,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:37,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:37,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918854800] [2021-06-30 11:47:37,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:37,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:37,306 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:37,371 INFO L93 Difference]: Finished difference Result 311 states and 915 transitions. [2021-06-30 11:47:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:37,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:37,372 INFO L225 Difference]: With dead ends: 311 [2021-06-30 11:47:37,372 INFO L226 Difference]: Without dead ends: 286 [2021-06-30 11:47:37,373 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-30 11:47:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 269. [2021-06-30 11:47:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0111940298507465) internal successors, (807), 268 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 807 transitions. [2021-06-30 11:47:37,378 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 807 transitions. Word has length 20 [2021-06-30 11:47:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:37,378 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 807 transitions. [2021-06-30 11:47:37,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 807 transitions. [2021-06-30 11:47:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:37,379 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:37,379 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:37,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:37,583 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1436809176, now seen corresponding path program 10 times [2021-06-30 11:47:37,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:37,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075819910] [2021-06-30 11:47:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:37,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:37,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075819910] [2021-06-30 11:47:37,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075819910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:37,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166323032] [2021-06-30 11:47:37,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:37,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:37,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:37,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:37,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166323032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:37,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:37,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:37,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744100969] [2021-06-30 11:47:37,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:37,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:37,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:37,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:37,691 INFO L87 Difference]: Start difference. First operand 269 states and 807 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:37,766 INFO L93 Difference]: Finished difference Result 365 states and 1089 transitions. [2021-06-30 11:47:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:37,767 INFO L225 Difference]: With dead ends: 365 [2021-06-30 11:47:37,767 INFO L226 Difference]: Without dead ends: 340 [2021-06-30 11:47:37,768 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-30 11:47:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 281. [2021-06-30 11:47:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.007142857142857) internal successors, (842), 280 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 842 transitions. [2021-06-30 11:47:37,772 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 842 transitions. Word has length 20 [2021-06-30 11:47:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:37,772 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 842 transitions. [2021-06-30 11:47:37,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 842 transitions. [2021-06-30 11:47:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:37,773 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:37,773 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:37,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:37,993 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash -609513708, now seen corresponding path program 11 times [2021-06-30 11:47:37,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:37,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771091087] [2021-06-30 11:47:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771091087] [2021-06-30 11:47:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771091087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551238875] [2021-06-30 11:47:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:38,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:38,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:38,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551238875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:38,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:38,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818818143] [2021-06-30 11:47:38,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:38,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:38,110 INFO L87 Difference]: Start difference. First operand 281 states and 842 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:38,209 INFO L93 Difference]: Finished difference Result 410 states and 1229 transitions. [2021-06-30 11:47:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:38,211 INFO L225 Difference]: With dead ends: 410 [2021-06-30 11:47:38,211 INFO L226 Difference]: Without dead ends: 395 [2021-06-30 11:47:38,211 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-30 11:47:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 363. [2021-06-30 11:47:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.096685082872928) internal successors, (1121), 362 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1121 transitions. [2021-06-30 11:47:38,217 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1121 transitions. Word has length 20 [2021-06-30 11:47:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:38,217 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 1121 transitions. [2021-06-30 11:47:38,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1121 transitions. [2021-06-30 11:47:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:38,218 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:38,218 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:38,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-30 11:47:38,433 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash -820719990, now seen corresponding path program 12 times [2021-06-30 11:47:38,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:38,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261631545] [2021-06-30 11:47:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:38,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:38,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261631545] [2021-06-30 11:47:38,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261631545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134257878] [2021-06-30 11:47:38,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:38,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:47:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:38,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134257878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:38,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:38,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950006593] [2021-06-30 11:47:38,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:38,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:38,542 INFO L87 Difference]: Start difference. First operand 363 states and 1121 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:38,600 INFO L93 Difference]: Finished difference Result 491 states and 1502 transitions. [2021-06-30 11:47:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:38,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:38,602 INFO L225 Difference]: With dead ends: 491 [2021-06-30 11:47:38,602 INFO L226 Difference]: Without dead ends: 484 [2021-06-30 11:47:38,602 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-30 11:47:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 433. [2021-06-30 11:47:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1643518518518516) internal successors, (1367), 432 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1367 transitions. [2021-06-30 11:47:38,609 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1367 transitions. Word has length 20 [2021-06-30 11:47:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:38,609 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1367 transitions. [2021-06-30 11:47:38,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1367 transitions. [2021-06-30 11:47:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:38,610 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:38,610 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:38,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-30 11:47:38,825 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:38,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1300004666, now seen corresponding path program 13 times [2021-06-30 11:47:38,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:38,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474618006] [2021-06-30 11:47:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:38,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:38,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474618006] [2021-06-30 11:47:38,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474618006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44194032] [2021-06-30 11:47:38,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:38,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:38,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44194032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:38,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:38,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:38,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731977333] [2021-06-30 11:47:38,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:38,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:38,940 INFO L87 Difference]: Start difference. First operand 433 states and 1367 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:39,046 INFO L93 Difference]: Finished difference Result 560 states and 1738 transitions. [2021-06-30 11:47:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:39,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:39,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:39,048 INFO L225 Difference]: With dead ends: 560 [2021-06-30 11:47:39,049 INFO L226 Difference]: Without dead ends: 515 [2021-06-30 11:47:39,049 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-30 11:47:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 398. [2021-06-30 11:47:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.1309823677581865) internal successors, (1243), 397 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1243 transitions. [2021-06-30 11:47:39,055 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1243 transitions. Word has length 20 [2021-06-30 11:47:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:39,055 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1243 transitions. [2021-06-30 11:47:39,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1243 transitions. [2021-06-30 11:47:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:39,056 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:39,056 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:39,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-30 11:47:39,272 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash -448097082, now seen corresponding path program 14 times [2021-06-30 11:47:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:39,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213878242] [2021-06-30 11:47:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:39,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:39,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213878242] [2021-06-30 11:47:39,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213878242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:39,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411021048] [2021-06-30 11:47:39,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:39,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:39,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:39,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411021048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:39,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:39,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:47:39,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769806002] [2021-06-30 11:47:39,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:47:39,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:47:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:39,379 INFO L87 Difference]: Start difference. First operand 398 states and 1243 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:39,426 INFO L93 Difference]: Finished difference Result 537 states and 1656 transitions. [2021-06-30 11:47:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:47:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:39,429 INFO L225 Difference]: With dead ends: 537 [2021-06-30 11:47:39,429 INFO L226 Difference]: Without dead ends: 517 [2021-06-30 11:47:39,429 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:47:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-30 11:47:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 504. [2021-06-30 11:47:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.125248508946322) internal successors, (1572), 503 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1572 transitions. [2021-06-30 11:47:39,436 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1572 transitions. Word has length 20 [2021-06-30 11:47:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:39,436 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1572 transitions. [2021-06-30 11:47:39,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1572 transitions. [2021-06-30 11:47:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:39,437 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:39,437 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:39,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:39,654 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:39,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1057803228, now seen corresponding path program 15 times [2021-06-30 11:47:39,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:39,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312021177] [2021-06-30 11:47:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:39,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:39,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312021177] [2021-06-30 11:47:39,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312021177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:39,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113574806] [2021-06-30 11:47:39,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:39,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:39,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:39,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:40,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113574806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:40,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708290619] [2021-06-30 11:47:40,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:40,115 INFO L87 Difference]: Start difference. First operand 504 states and 1572 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:40,194 INFO L93 Difference]: Finished difference Result 629 states and 1939 transitions. [2021-06-30 11:47:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:40,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:40,197 INFO L225 Difference]: With dead ends: 629 [2021-06-30 11:47:40,197 INFO L226 Difference]: Without dead ends: 577 [2021-06-30 11:47:40,197 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-30 11:47:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 481. [2021-06-30 11:47:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.13125) internal successors, (1503), 480 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1503 transitions. [2021-06-30 11:47:40,207 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1503 transitions. Word has length 20 [2021-06-30 11:47:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:40,207 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1503 transitions. [2021-06-30 11:47:40,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1503 transitions. [2021-06-30 11:47:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:40,208 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:40,208 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:40,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-30 11:47:40,425 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170046, now seen corresponding path program 16 times [2021-06-30 11:47:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:40,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479079197] [2021-06-30 11:47:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:40,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:40,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479079197] [2021-06-30 11:47:40,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479079197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155045208] [2021-06-30 11:47:40,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:40,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:40,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:40,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:40,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155045208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:40,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 11:47:40,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236331785] [2021-06-30 11:47:40,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 11:47:40,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:40,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 11:47:40,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:40,540 INFO L87 Difference]: Start difference. First operand 481 states and 1503 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:40,596 INFO L93 Difference]: Finished difference Result 718 states and 2218 transitions. [2021-06-30 11:47:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 11:47:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:40,598 INFO L225 Difference]: With dead ends: 718 [2021-06-30 11:47:40,599 INFO L226 Difference]: Without dead ends: 660 [2021-06-30 11:47:40,599 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 11:47:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-30 11:47:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 645. [2021-06-30 11:47:40,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.124223602484472) internal successors, (2012), 644 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2012 transitions. [2021-06-30 11:47:40,608 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2012 transitions. Word has length 20 [2021-06-30 11:47:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:40,609 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2012 transitions. [2021-06-30 11:47:40,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2012 transitions. [2021-06-30 11:47:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:40,610 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:40,610 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:40,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-30 11:47:40,813 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 950266168, now seen corresponding path program 17 times [2021-06-30 11:47:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:40,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237331067] [2021-06-30 11:47:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:40,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:40,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237331067] [2021-06-30 11:47:40,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237331067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755451814] [2021-06-30 11:47:40,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:40,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:40,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755451814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:40,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:40,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:40,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502196628] [2021-06-30 11:47:40,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:40,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:40,916 INFO L87 Difference]: Start difference. First operand 645 states and 2012 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:40,986 INFO L93 Difference]: Finished difference Result 792 states and 2461 transitions. [2021-06-30 11:47:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:40,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:40,988 INFO L225 Difference]: With dead ends: 792 [2021-06-30 11:47:40,988 INFO L226 Difference]: Without dead ends: 716 [2021-06-30 11:47:40,989 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:40,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-30 11:47:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 666. [2021-06-30 11:47:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.093233082706767) internal successors, (2057), 665 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2057 transitions. [2021-06-30 11:47:40,998 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2057 transitions. Word has length 20 [2021-06-30 11:47:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:40,999 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2057 transitions. [2021-06-30 11:47:40,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2057 transitions. [2021-06-30 11:47:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:41,000 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:41,000 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:41,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-30 11:47:41,213 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:41,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2057366880, now seen corresponding path program 18 times [2021-06-30 11:47:41,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:41,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540363400] [2021-06-30 11:47:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:41,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:41,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540363400] [2021-06-30 11:47:41,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540363400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:41,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655325746] [2021-06-30 11:47:41,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:41,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:47:41,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:41,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655325746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:41,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:41,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:41,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891874798] [2021-06-30 11:47:41,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:41,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:41,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:41,323 INFO L87 Difference]: Start difference. First operand 666 states and 2057 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:41,424 INFO L93 Difference]: Finished difference Result 810 states and 2486 transitions. [2021-06-30 11:47:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:41,427 INFO L225 Difference]: With dead ends: 810 [2021-06-30 11:47:41,427 INFO L226 Difference]: Without dead ends: 775 [2021-06-30 11:47:41,428 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-30 11:47:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 687. [2021-06-30 11:47:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.107871720116618) internal successors, (2132), 686 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2132 transitions. [2021-06-30 11:47:41,439 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2132 transitions. Word has length 20 [2021-06-30 11:47:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:41,439 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2132 transitions. [2021-06-30 11:47:41,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2132 transitions. [2021-06-30 11:47:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:41,440 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:41,440 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:41,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:41,661 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 264677348, now seen corresponding path program 19 times [2021-06-30 11:47:41,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:41,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841749320] [2021-06-30 11:47:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:41,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:41,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841749320] [2021-06-30 11:47:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841749320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:41,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307622547] [2021-06-30 11:47:41,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:41,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:41,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307622547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:41,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:41,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:41,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928599846] [2021-06-30 11:47:41,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:41,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:41,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:41,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:41,848 INFO L87 Difference]: Start difference. First operand 687 states and 2132 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:41,951 INFO L93 Difference]: Finished difference Result 874 states and 2701 transitions. [2021-06-30 11:47:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:41,955 INFO L225 Difference]: With dead ends: 874 [2021-06-30 11:47:41,955 INFO L226 Difference]: Without dead ends: 858 [2021-06-30 11:47:41,955 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-30 11:47:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 785. [2021-06-30 11:47:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.1683673469387754) internal successors, (2484), 784 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2484 transitions. [2021-06-30 11:47:41,967 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2484 transitions. Word has length 20 [2021-06-30 11:47:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:41,967 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2484 transitions. [2021-06-30 11:47:41,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2484 transitions. [2021-06-30 11:47:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:41,968 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:41,968 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:42,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:42,185 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:42,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1091972816, now seen corresponding path program 20 times [2021-06-30 11:47:42,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:42,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25993733] [2021-06-30 11:47:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:42,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25993733] [2021-06-30 11:47:42,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25993733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782798353] [2021-06-30 11:47:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:42,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:42,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:42,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:47:42,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782798353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:42,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:42,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523608569] [2021-06-30 11:47:42,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:42,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:42,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:42,291 INFO L87 Difference]: Start difference. First operand 785 states and 2484 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:42,364 INFO L93 Difference]: Finished difference Result 991 states and 3119 transitions. [2021-06-30 11:47:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:42,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:42,367 INFO L225 Difference]: With dead ends: 991 [2021-06-30 11:47:42,367 INFO L226 Difference]: Without dead ends: 952 [2021-06-30 11:47:42,367 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-30 11:47:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 880. [2021-06-30 11:47:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.2127417519908987) internal successors, (2824), 879 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2824 transitions. [2021-06-30 11:47:42,379 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2824 transitions. Word has length 20 [2021-06-30 11:47:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:42,380 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 2824 transitions. [2021-06-30 11:47:42,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2824 transitions. [2021-06-30 11:47:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:42,381 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:42,381 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:42,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-30 11:47:42,598 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:42,598 INFO L82 PathProgramCache]: Analyzing trace with hash 818152864, now seen corresponding path program 21 times [2021-06-30 11:47:42,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:42,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070449975] [2021-06-30 11:47:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:42,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:42,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070449975] [2021-06-30 11:47:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070449975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11845237] [2021-06-30 11:47:42,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-30 11:47:42,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:42,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:42,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:42,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11845237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:42,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:42,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:42,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146717082] [2021-06-30 11:47:42,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:42,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:42,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:42,780 INFO L87 Difference]: Start difference. First operand 880 states and 2824 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:42,854 INFO L93 Difference]: Finished difference Result 1129 states and 3575 transitions. [2021-06-30 11:47:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:42,858 INFO L225 Difference]: With dead ends: 1129 [2021-06-30 11:47:42,858 INFO L226 Difference]: Without dead ends: 1039 [2021-06-30 11:47:42,858 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-30 11:47:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1025. [2021-06-30 11:47:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.1982421875) internal successors, (3275), 1024 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3275 transitions. [2021-06-30 11:47:42,873 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3275 transitions. Word has length 20 [2021-06-30 11:47:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:42,873 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3275 transitions. [2021-06-30 11:47:42,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3275 transitions. [2021-06-30 11:47:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:42,875 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:42,875 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:43,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-30 11:47:43,089 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1438701004, now seen corresponding path program 22 times [2021-06-30 11:47:43,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:43,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845985375] [2021-06-30 11:47:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:43,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:43,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845985375] [2021-06-30 11:47:43,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845985375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:43,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791536554] [2021-06-30 11:47:43,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:43,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:43,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791536554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:43,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:43,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:43,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826523130] [2021-06-30 11:47:43,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:43,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:43,182 INFO L87 Difference]: Start difference. First operand 1025 states and 3275 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:43,262 INFO L93 Difference]: Finished difference Result 1401 states and 4441 transitions. [2021-06-30 11:47:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:43,268 INFO L225 Difference]: With dead ends: 1401 [2021-06-30 11:47:43,268 INFO L226 Difference]: Without dead ends: 1331 [2021-06-30 11:47:43,268 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-30 11:47:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1318. [2021-06-30 11:47:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.1776765375854215) internal successors, (4185), 1317 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4185 transitions. [2021-06-30 11:47:43,289 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4185 transitions. Word has length 20 [2021-06-30 11:47:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:43,290 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4185 transitions. [2021-06-30 11:47:43,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4185 transitions. [2021-06-30 11:47:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:43,292 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:43,292 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:43,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:43,505 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 748210046, now seen corresponding path program 23 times [2021-06-30 11:47:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:43,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728921840] [2021-06-30 11:47:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:43,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728921840] [2021-06-30 11:47:43,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728921840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638797913] [2021-06-30 11:47:43,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:43,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:47:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:43,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:43,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:43,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638797913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:43,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:43,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:43,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418621805] [2021-06-30 11:47:43,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:43,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:43,597 INFO L87 Difference]: Start difference. First operand 1318 states and 4185 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:43,703 INFO L93 Difference]: Finished difference Result 1585 states and 4997 transitions. [2021-06-30 11:47:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:43,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:43,709 INFO L225 Difference]: With dead ends: 1585 [2021-06-30 11:47:43,709 INFO L226 Difference]: Without dead ends: 1561 [2021-06-30 11:47:43,709 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-06-30 11:47:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1490. [2021-06-30 11:47:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.1967763599731365) internal successors, (4760), 1489 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4760 transitions. [2021-06-30 11:47:43,731 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4760 transitions. Word has length 20 [2021-06-30 11:47:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:43,731 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 4760 transitions. [2021-06-30 11:47:43,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4760 transitions. [2021-06-30 11:47:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-30 11:47:43,734 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:43,734 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:43,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-30 11:47:43,949 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:43,949 INFO L82 PathProgramCache]: Analyzing trace with hash -126044614, now seen corresponding path program 24 times [2021-06-30 11:47:43,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:43,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554203772] [2021-06-30 11:47:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:43,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:43,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554203772] [2021-06-30 11:47:43,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554203772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:43,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067760083] [2021-06-30 11:47:43,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:44,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-30 11:47:44,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:47:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:44,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067760083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:44,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:44,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 11:47:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840322697] [2021-06-30 11:47:44,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 11:47:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 11:47:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:44,039 INFO L87 Difference]: Start difference. First operand 1490 states and 4760 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:44,141 INFO L93 Difference]: Finished difference Result 1754 states and 5570 transitions. [2021-06-30 11:47:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 11:47:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-30 11:47:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:44,145 INFO L225 Difference]: With dead ends: 1754 [2021-06-30 11:47:44,145 INFO L226 Difference]: Without dead ends: 1656 [2021-06-30 11:47:44,145 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 11:47:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-30 11:47:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1609. [2021-06-30 11:47:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 3.220771144278607) internal successors, (5179), 1608 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5179 transitions. [2021-06-30 11:47:44,168 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5179 transitions. Word has length 20 [2021-06-30 11:47:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:44,168 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 5179 transitions. [2021-06-30 11:47:44,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5179 transitions. [2021-06-30 11:47:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:44,170 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:44,170 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:44,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:44,386 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:44,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1037009858, now seen corresponding path program 25 times [2021-06-30 11:47:44,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:44,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235182691] [2021-06-30 11:47:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:44,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:44,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235182691] [2021-06-30 11:47:44,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235182691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:44,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982025177] [2021-06-30 11:47:44,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 11:47:44,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:47:44,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982025177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:44,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:44,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-30 11:47:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356830449] [2021-06-30 11:47:44,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-30 11:47:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-30 11:47:44,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:44,542 INFO L87 Difference]: Start difference. First operand 1609 states and 5179 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:44,651 INFO L93 Difference]: Finished difference Result 1770 states and 5609 transitions. [2021-06-30 11:47:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-30 11:47:44,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:44,655 INFO L225 Difference]: With dead ends: 1770 [2021-06-30 11:47:44,655 INFO L226 Difference]: Without dead ends: 1658 [2021-06-30 11:47:44,655 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-06-30 11:47:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1429. [2021-06-30 11:47:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.130252100840336) internal successors, (4470), 1428 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4470 transitions. [2021-06-30 11:47:44,677 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4470 transitions. Word has length 23 [2021-06-30 11:47:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:44,677 INFO L482 AbstractCegarLoop]: Abstraction has 1429 states and 4470 transitions. [2021-06-30 11:47:44,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4470 transitions. [2021-06-30 11:47:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:44,679 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:44,679 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:44,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-30 11:47:44,895 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash 346518900, now seen corresponding path program 26 times [2021-06-30 11:47:44,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:44,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524050218] [2021-06-30 11:47:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-30 11:47:44,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:44,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524050218] [2021-06-30 11:47:44,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524050218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:44,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881001963] [2021-06-30 11:47:44,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:44,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-30 11:47:44,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 11:47:44,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-30 11:47:45,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881001963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:45,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:45,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-30 11:47:45,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926462840] [2021-06-30 11:47:45,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-30 11:47:45,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-30 11:47:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:45,027 INFO L87 Difference]: Start difference. First operand 1429 states and 4470 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:45,121 INFO L93 Difference]: Finished difference Result 1614 states and 4971 transitions. [2021-06-30 11:47:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-30 11:47:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:45,124 INFO L225 Difference]: With dead ends: 1614 [2021-06-30 11:47:45,124 INFO L226 Difference]: Without dead ends: 1506 [2021-06-30 11:47:45,124 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-30 11:47:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1071. [2021-06-30 11:47:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 3.041121495327103) internal successors, (3254), 1070 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 3254 transitions. [2021-06-30 11:47:45,137 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 3254 transitions. Word has length 23 [2021-06-30 11:47:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:45,138 INFO L482 AbstractCegarLoop]: Abstraction has 1071 states and 3254 transitions. [2021-06-30 11:47:45,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 3254 transitions. [2021-06-30 11:47:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:45,139 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:45,139 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:45,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-30 11:47:45,354 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:45,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:45,355 INFO L82 PathProgramCache]: Analyzing trace with hash -527735760, now seen corresponding path program 27 times [2021-06-30 11:47:45,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:45,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411779159] [2021-06-30 11:47:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-30 11:47:45,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:45,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411779159] [2021-06-30 11:47:45,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411779159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:45,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530458157] [2021-06-30 11:47:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:45,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-30 11:47:45,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:45,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 11:47:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-30 11:47:45,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530458157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:45,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:45,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-30 11:47:45,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259868816] [2021-06-30 11:47:45,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-30 11:47:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-30 11:47:45,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:45,455 INFO L87 Difference]: Start difference. First operand 1071 states and 3254 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:45,552 INFO L93 Difference]: Finished difference Result 1223 states and 3704 transitions. [2021-06-30 11:47:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-30 11:47:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-30 11:47:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:45,554 INFO L225 Difference]: With dead ends: 1223 [2021-06-30 11:47:45,554 INFO L226 Difference]: Without dead ends: 1039 [2021-06-30 11:47:45,555 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-30 11:47:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 304. [2021-06-30 11:47:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9603960396039604) internal successors, (897), 303 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-06-30 11:47:45,561 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 23 [2021-06-30 11:47:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:45,561 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-06-30 11:47:45,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-06-30 11:47:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:45,562 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:45,562 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:45,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-30 11:47:45,777 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:45,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1630008436, now seen corresponding path program 28 times [2021-06-30 11:47:45,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:45,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765053601] [2021-06-30 11:47:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:45,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:45,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765053601] [2021-06-30 11:47:45,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765053601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:45,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052355362] [2021-06-30 11:47:45,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:45,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-30 11:47:45,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 11:47:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:45,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052355362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:45,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:45,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-30 11:47:45,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547685177] [2021-06-30 11:47:45,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-30 11:47:45,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:45,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-30 11:47:45,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:45,912 INFO L87 Difference]: Start difference. First operand 304 states and 897 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:46,008 INFO L93 Difference]: Finished difference Result 552 states and 1635 transitions. [2021-06-30 11:47:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-30 11:47:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 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 [2021-06-30 11:47:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:46,009 INFO L225 Difference]: With dead ends: 552 [2021-06-30 11:47:46,009 INFO L226 Difference]: Without dead ends: 519 [2021-06-30 11:47:46,009 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 11:47:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-30 11:47:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2021-06-30 11:47:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.9825581395348837) internal successors, (1539), 516 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1539 transitions. [2021-06-30 11:47:46,015 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1539 transitions. Word has length 23 [2021-06-30 11:47:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:46,015 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1539 transitions. [2021-06-30 11:47:46,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1539 transitions. [2021-06-30 11:47:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:47:46,016 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:47:46,016 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:47:46,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-30 11:47:46,230 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 11:47:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:47:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1150723760, now seen corresponding path program 29 times [2021-06-30 11:47:46,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:47:46,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067295987] [2021-06-30 11:47:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:47:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:47:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:46,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:47:46,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067295987] [2021-06-30 11:47:46,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067295987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:46,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478340944] [2021-06-30 11:47:46,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:47:46,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-30 11:47:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-30 11:47:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 11:47:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:47:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:47:46,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478340944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:47:46,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:47:46,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-30 11:47:46,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391006754] [2021-06-30 11:47:46,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-30 11:47:46,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:47:46,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-30 11:47:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-30 11:47:46,374 INFO L87 Difference]: Start difference. First operand 517 states and 1539 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:47:46,497 INFO L93 Difference]: Finished difference Result 516 states and 1538 transitions. [2021-06-30 11:47:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-30 11:47:46,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 [2021-06-30 11:47:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:47:46,498 INFO L225 Difference]: With dead ends: 516 [2021-06-30 11:47:46,498 INFO L226 Difference]: Without dead ends: 0 [2021-06-30 11:47:46,498 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-30 11:47:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-30 11:47:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-30 11:47:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-30 11:47:46,498 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-06-30 11:47:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:47:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-30 11:47:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:47:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-30 11:47:46,499 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-30 11:47:46,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-30 11:47:46,701 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-30 11:47:46,702 INFO L202 PluginConnector]: Adding new model add-sub03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.06 11:47:46 BasicIcfg [2021-06-30 11:47:46,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-30 11:47:46,703 INFO L168 Benchmark]: Toolchain (without parser) took 15226.42 ms. Allocated memory was 182.5 MB in the beginning and 316.7 MB in the end (delta: 134.2 MB). Free memory was 163.5 MB in the beginning and 197.5 MB in the end (delta: -34.1 MB). Peak memory consumption was 100.7 MB. Max. memory is 8.0 GB. [2021-06-30 11:47:46,703 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 182.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-30 11:47:46,703 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.33 ms. Allocated memory is still 182.5 MB. Free memory was 163.5 MB in the beginning and 162.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-30 11:47:46,703 INFO L168 Benchmark]: Boogie Preprocessor took 29.26 ms. Allocated memory is still 182.5 MB. Free memory was 162.0 MB in the beginning and 161.1 MB in the end (delta: 900.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-30 11:47:46,703 INFO L168 Benchmark]: RCFGBuilder took 178.77 ms. Allocated memory is still 182.5 MB. Free memory was 161.1 MB in the beginning and 152.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-06-30 11:47:46,703 INFO L168 Benchmark]: TraceAbstraction took 14944.14 ms. Allocated memory was 182.5 MB in the beginning and 316.7 MB in the end (delta: 134.2 MB). Free memory was 151.9 MB in the beginning and 197.5 MB in the end (delta: -45.6 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. [2021-06-30 11:47:46,703 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 0.12 ms. Allocated memory is still 182.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 31.33 ms. Allocated memory is still 182.5 MB. Free memory was 163.5 MB in the beginning and 162.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.26 ms. Allocated memory is still 182.5 MB. Free memory was 162.0 MB in the beginning and 161.1 MB in the end (delta: 900.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 178.77 ms. Allocated memory is still 182.5 MB. Free memory was 161.1 MB in the beginning and 152.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14944.14 ms. Allocated memory was 182.5 MB in the beginning and 316.7 MB in the end (delta: 134.2 MB). Free memory was 151.9 MB in the beginning and 197.5 MB in the end (delta: -45.6 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 30 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14838.2ms, OverallIterations: 41, TraceHistogramMax: 2, EmptinessCheckTime: 53.5ms, AutomataDifference: 2992.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1343 SDtfs, 670 SDslu, 4142 SDs, 0 SdLazy, 5115 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2015.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 820 GetRequests, 553 SyntacticMatches, 69 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1559.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1609occurred in iteration=36, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 408.0ms AutomataMinimizationTime, 41 MinimizatonAttempts, 3357 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.6ms SsaConstructionTime, 310.9ms SatisfiabilityAnalysisTime, 3736.7ms InterpolantComputationTime, 1370 NumberOfCodeBlocks, 1370 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 1300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9848 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1373 ConjunctsInSsa, 443 ConjunctsInUnsatCore, 70 InterpolantComputations, 12 PerfectInterpolantSequences, 88/230 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...