/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:22:53,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:22:53,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:22:53,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:22:53,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:22:53,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:22:53,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:22:53,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:22:53,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:22:53,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:22:53,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:22:53,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:22:53,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:22:53,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:22:53,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:22:53,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:22:53,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 16:22:53,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 16:22:53,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 16:22:53,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 16:22:53,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 16:22:53,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 16:22:53,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 16:22:53,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 16:22:53,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 16:22:53,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:22:53,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:22:53,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:22:53,606 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 [2021-05-03 16:22:53,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:22:53,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:22:53,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:22:53,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:22:53,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:22:53,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:22:53,651 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:22:53,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:22:53,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:22:53,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:22:53,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:22:53,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:22:53,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:22:53,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:22:53,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:22:53,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:22:53,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:22:53,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:22:53,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:22:53,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:22:53,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:22:53,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:22:53,655 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:22:53,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:22:53,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:22:54,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:22:54,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:22:54,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:22:54,051 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:22:54,053 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:22:54,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-05-03 16:22:54,054 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-05-03 16:22:54,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:22:54,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:22:54,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:22:54,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:22:54,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:22:54,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:22:54,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:22:54,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:22:54,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:22:54,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/1) ... [2021-05-03 16:22:54,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:22:54,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:22:54,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:22:54,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:22:54,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (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 [2021-05-03 16:22:54,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:22:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:22:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:22:54,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:22:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:22:54,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:22:54,234 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:22:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:22:54,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:22:54,234 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:22:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:22:54,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:22:54,235 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 16:22:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 16:22:54,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 16:22:54,236 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:22:54,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:22:54,544 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:22:54,545 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:22:54 BoogieIcfgContainer [2021-05-03 16:22:54,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:22:54,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:22:54,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:22:54,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:22:54,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:22:54" (1/2) ... [2021-05-03 16:22:54,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f974e6 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:22:54, skipping insertion in model container [2021-05-03 16:22:54,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:22:54" (2/2) ... [2021-05-03 16:22:54,553 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-05-03 16:22:54,559 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:22:54,559 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:22:54,563 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:22:54,563 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:22:54,653 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 16:22:54,677 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 16:22:54,707 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:22:54,707 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:22:54,709 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:22:54,709 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:22:54,709 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:22:54,709 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:22:54,709 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:22:54,709 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:22:54,727 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-05-03 16:22:54,806 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 16:22:54,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:54,839 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:54,839 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-05-03 16:22:54,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:54,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532263065] [2021-05-03 16:22:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:55,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532263065] [2021-05-03 16:22:55,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:22:55,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:22:55,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768368885] [2021-05-03 16:22:55,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:22:55,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:22:55,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:22:55,083 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:55,173 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-05-03 16:22:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:22:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 16:22:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:55,215 INFO L225 Difference]: With dead ends: 1236 [2021-05-03 16:22:55,215 INFO L226 Difference]: Without dead ends: 1109 [2021-05-03 16:22:55,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:22:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-05-03 16:22:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-05-03 16:22:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-05-03 16:22:55,332 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-05-03 16:22:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:55,334 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-05-03 16:22:55,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-05-03 16:22:55,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:22:55,338 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:55,338 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:55,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:22:55,339 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-05-03 16:22:55,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:55,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959625185] [2021-05-03 16:22:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:55,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959625185] [2021-05-03 16:22:55,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:22:55,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:22:55,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344436898] [2021-05-03 16:22:55,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:22:55,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:55,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:22:55,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:22:55,423 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:55,482 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-05-03 16:22:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:22:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:22:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:55,494 INFO L225 Difference]: With dead ends: 1524 [2021-05-03 16:22:55,494 INFO L226 Difference]: Without dead ends: 1418 [2021-05-03 16:22:55,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:22:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-05-03 16:22:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-05-03 16:22:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-05-03 16:22:55,555 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-05-03 16:22:55,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:55,556 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-05-03 16:22:55,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-05-03 16:22:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:22:55,561 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:55,561 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:55,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:22:55,561 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:55,562 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-05-03 16:22:55,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:55,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385426992] [2021-05-03 16:22:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:55,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385426992] [2021-05-03 16:22:55,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:22:55,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:22:55,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002402991] [2021-05-03 16:22:55,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:22:55,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:22:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:22:55,609 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:55,704 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-05-03 16:22:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:22:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:22:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:55,720 INFO L225 Difference]: With dead ends: 2017 [2021-05-03 16:22:55,721 INFO L226 Difference]: Without dead ends: 1875 [2021-05-03 16:22:55,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:22:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-05-03 16:22:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-05-03 16:22:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-05-03 16:22:55,805 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-05-03 16:22:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:55,811 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-05-03 16:22:55,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-05-03 16:22:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:22:55,820 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:55,820 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:55,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:22:55,820 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-05-03 16:22:55,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:55,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067224509] [2021-05-03 16:22:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:55,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067224509] [2021-05-03 16:22:55,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121134100] [2021-05-03 16:22:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:22:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:56,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:56,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-05-03 16:22:56,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52094688] [2021-05-03 16:22:56,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:22:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:22:56,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:22:56,259 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:56,423 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-05-03 16:22:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:22:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:22:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:56,441 INFO L225 Difference]: With dead ends: 2308 [2021-05-03 16:22:56,441 INFO L226 Difference]: Without dead ends: 2108 [2021-05-03 16:22:56,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:22:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-05-03 16:22:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-05-03 16:22:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-05-03 16:22:56,519 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-05-03 16:22:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:56,520 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-05-03 16:22:56,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-05-03 16:22:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:22:56,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:56,526 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:56,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:56,741 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1080968406, now seen corresponding path program 1 times [2021-05-03 16:22:56,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:56,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164556740] [2021-05-03 16:22:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:56,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164556740] [2021-05-03 16:22:56,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:22:56,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:22:56,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487414583] [2021-05-03 16:22:56,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:22:56,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:56,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:22:56,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:22:56,797 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:56,890 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-05-03 16:22:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:22:56,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:22:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:56,905 INFO L225 Difference]: With dead ends: 1950 [2021-05-03 16:22:56,906 INFO L226 Difference]: Without dead ends: 1860 [2021-05-03 16:22:56,906 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:22:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-05-03 16:22:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-05-03 16:22:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-05-03 16:22:56,976 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-05-03 16:22:56,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:56,977 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-05-03 16:22:56,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-05-03 16:22:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:22:56,983 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:56,983 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:56,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 16:22:56,983 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1489193046, now seen corresponding path program 2 times [2021-05-03 16:22:56,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:56,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614163153] [2021-05-03 16:22:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:57,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614163153] [2021-05-03 16:22:57,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:22:57,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:22:57,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613868517] [2021-05-03 16:22:57,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:22:57,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:22:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:22:57,022 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:57,097 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-05-03 16:22:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:22:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:22:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:57,106 INFO L225 Difference]: With dead ends: 1308 [2021-05-03 16:22:57,106 INFO L226 Difference]: Without dead ends: 1308 [2021-05-03 16:22:57,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:22:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-05-03 16:22:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-05-03 16:22:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-05-03 16:22:57,150 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-05-03 16:22:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:57,153 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-05-03 16:22:57,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-05-03 16:22:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:22:57,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:57,157 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:57,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 16:22:57,160 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-05-03 16:22:57,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:57,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490186085] [2021-05-03 16:22:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:57,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490186085] [2021-05-03 16:22:57,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:22:57,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:22:57,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394015658] [2021-05-03 16:22:57,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:22:57,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:22:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:22:57,216 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:57,268 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-05-03 16:22:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:22:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:22:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:57,276 INFO L225 Difference]: With dead ends: 1142 [2021-05-03 16:22:57,276 INFO L226 Difference]: Without dead ends: 1120 [2021-05-03 16:22:57,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:22:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-05-03 16:22:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-05-03 16:22:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-05-03 16:22:57,317 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-05-03 16:22:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:57,317 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-05-03 16:22:57,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-05-03 16:22:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:22:57,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:57,322 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:57,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 16:22:57,322 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1861969590, now seen corresponding path program 1 times [2021-05-03 16:22:57,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:57,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091458767] [2021-05-03 16:22:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:57,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091458767] [2021-05-03 16:22:57,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640622732] [2021-05-03 16:22:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:57,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:22:57,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:57,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:22:57,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-05-03 16:22:57,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809243432] [2021-05-03 16:22:57,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:22:57,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:22:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:22:57,459 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:57,479 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-05-03 16:22:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:22:57,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:22:57,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:57,489 INFO L225 Difference]: With dead ends: 1344 [2021-05-03 16:22:57,489 INFO L226 Difference]: Without dead ends: 1344 [2021-05-03 16:22:57,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:22:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-05-03 16:22:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-05-03 16:22:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-05-03 16:22:57,524 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-05-03 16:22:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:57,525 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-05-03 16:22:57,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-05-03 16:22:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:22:57,527 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:57,527 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:57,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:57,753 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:57,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1282023498, now seen corresponding path program 1 times [2021-05-03 16:22:57,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:57,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536088055] [2021-05-03 16:22:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:57,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536088055] [2021-05-03 16:22:57,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313959298] [2021-05-03 16:22:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:22:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:57,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:22:57,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-05-03 16:22:57,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444216291] [2021-05-03 16:22:57,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:22:57,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:22:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:22:57,894 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:57,914 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-05-03 16:22:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:22:57,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:22:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:57,939 INFO L225 Difference]: With dead ends: 1608 [2021-05-03 16:22:57,939 INFO L226 Difference]: Without dead ends: 1608 [2021-05-03 16:22:57,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:22:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-05-03 16:22:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-05-03 16:22:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-05-03 16:22:57,974 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-05-03 16:22:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:57,975 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-05-03 16:22:57,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-05-03 16:22:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:22:57,977 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:57,978 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:58,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:58,199 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:58,200 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 1 times [2021-05-03 16:22:58,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:58,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280455564] [2021-05-03 16:22:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:58,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280455564] [2021-05-03 16:22:58,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739857675] [2021-05-03 16:22:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:22:58,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:58,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:22:58,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:58,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:58,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:58,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-05-03 16:22:58,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:22:58,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:58,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:58,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:58,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-05-03 16:22:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:58,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:58,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:22:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611161512] [2021-05-03 16:22:58,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:22:58,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:22:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:22:58,701 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:58,891 INFO L93 Difference]: Finished difference Result 2449 states and 9125 transitions. [2021-05-03 16:22:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:22:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:22:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:58,900 INFO L225 Difference]: With dead ends: 2449 [2021-05-03 16:22:58,900 INFO L226 Difference]: Without dead ends: 2370 [2021-05-03 16:22:58,901 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:22:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-05-03 16:22:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1512. [2021-05-03 16:22:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.7068166776968896) internal successors, (5601), 1511 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5601 transitions. [2021-05-03 16:22:58,969 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5601 transitions. Word has length 29 [2021-05-03 16:22:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:58,969 INFO L480 AbstractCegarLoop]: Abstraction has 1512 states and 5601 transitions. [2021-05-03 16:22:58,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5601 transitions. [2021-05-03 16:22:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:22:58,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:58,974 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:59,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:59,189 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:59,190 INFO L82 PathProgramCache]: Analyzing trace with hash -53868170, now seen corresponding path program 2 times [2021-05-03 16:22:59,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:59,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432337144] [2021-05-03 16:22:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:59,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432337144] [2021-05-03 16:22:59,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375926135] [2021-05-03 16:22:59,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:59,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:22:59,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:22:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:59,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 16:22:59,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:59,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:59,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:59,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:22:59,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:22:59,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:59,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:59,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:59,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:22:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:59,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:59,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:22:59,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743045234] [2021-05-03 16:22:59,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:22:59,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:22:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:22:59,579 INFO L87 Difference]: Start difference. First operand 1512 states and 5601 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:59,782 INFO L93 Difference]: Finished difference Result 2849 states and 10712 transitions. [2021-05-03 16:22:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:22:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:22:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:59,792 INFO L225 Difference]: With dead ends: 2849 [2021-05-03 16:22:59,792 INFO L226 Difference]: Without dead ends: 2770 [2021-05-03 16:22:59,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:22:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-05-03 16:22:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1711. [2021-05-03 16:22:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.7239766081871344) internal successors, (6368), 1710 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 6368 transitions. [2021-05-03 16:22:59,844 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 6368 transitions. Word has length 29 [2021-05-03 16:22:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:59,845 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 6368 transitions. [2021-05-03 16:22:59,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 6368 transitions. [2021-05-03 16:22:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:22:59,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:59,850 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:00,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 16:23:00,061 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1931624520, now seen corresponding path program 3 times [2021-05-03 16:23:00,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:00,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175559608] [2021-05-03 16:23:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:00,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175559608] [2021-05-03 16:23:00,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032897787] [2021-05-03 16:23:00,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:00,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:23:00,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:00,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:23:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:00,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 16:23:00,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:00,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:00,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:00,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:23:00,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:23:00,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:00,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:00,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:00,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:23:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:00,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:00,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:23:00,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001359832] [2021-05-03 16:23:00,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:23:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:23:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:23:00,374 INFO L87 Difference]: Start difference. First operand 1711 states and 6368 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:00,575 INFO L93 Difference]: Finished difference Result 2677 states and 10034 transitions. [2021-05-03 16:23:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:23:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:23:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:00,585 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 16:23:00,585 INFO L226 Difference]: Without dead ends: 2598 [2021-05-03 16:23:00,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:23:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-05-03 16:23:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1837. [2021-05-03 16:23:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-05-03 16:23:00,663 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-05-03 16:23:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:00,664 INFO L480 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-05-03 16:23:00,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-05-03 16:23:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:23:00,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:00,669 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:00,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:00,885 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:00,885 INFO L82 PathProgramCache]: Analyzing trace with hash 490207522, now seen corresponding path program 4 times [2021-05-03 16:23:00,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:00,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087843685] [2021-05-03 16:23:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:01,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087843685] [2021-05-03 16:23:01,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156595401] [2021-05-03 16:23:01,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:01,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:23:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:01,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 16:23:01,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:01,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:23:01,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:23:01,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:01,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:23:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:01,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:01,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:23:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9175256] [2021-05-03 16:23:01,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:23:01,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:23:01,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:23:01,223 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:01,499 INFO L93 Difference]: Finished difference Result 3111 states and 11725 transitions. [2021-05-03 16:23:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:23:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:23:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:01,510 INFO L225 Difference]: With dead ends: 3111 [2021-05-03 16:23:01,510 INFO L226 Difference]: Without dead ends: 3032 [2021-05-03 16:23:01,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:23:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-05-03 16:23:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2051. [2021-05-03 16:23:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-05-03 16:23:01,570 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-05-03 16:23:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:01,570 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-05-03 16:23:01,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-05-03 16:23:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:23:01,576 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:01,576 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:01,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:01,789 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash -464930448, now seen corresponding path program 5 times [2021-05-03 16:23:01,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:01,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567030167] [2021-05-03 16:23:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:01,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567030167] [2021-05-03 16:23:01,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814889083] [2021-05-03 16:23:01,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:01,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:23:01,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:23:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:02,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 16:23:02,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:02,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:23:02,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:23:02,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:02,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:23:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:02,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:02,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:23:02,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272531545] [2021-05-03 16:23:02,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:23:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:23:02,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:23:02,120 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:02,371 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-05-03 16:23:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:23:02,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:23:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:02,379 INFO L225 Difference]: With dead ends: 2933 [2021-05-03 16:23:02,379 INFO L226 Difference]: Without dead ends: 2854 [2021-05-03 16:23:02,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:23:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-05-03 16:23:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-05-03 16:23:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-05-03 16:23:02,429 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-05-03 16:23:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:02,429 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-05-03 16:23:02,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-05-03 16:23:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:23:02,434 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:02,434 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:02,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 16:23:02,645 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1689459718, now seen corresponding path program 6 times [2021-05-03 16:23:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:02,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240082297] [2021-05-03 16:23:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240082297] [2021-05-03 16:23:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328550898] [2021-05-03 16:23:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:02,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:23:02,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:23:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:02,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:23:02,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:02,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-05-03 16:23:02,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:23:02,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:02,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:02,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-05-03 16:23:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:02,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:02,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:23:02,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819619692] [2021-05-03 16:23:02,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:23:02,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:02,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:23:02,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:23:02,982 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:03,193 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-05-03 16:23:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:23:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:23:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:03,203 INFO L225 Difference]: With dead ends: 2807 [2021-05-03 16:23:03,203 INFO L226 Difference]: Without dead ends: 2728 [2021-05-03 16:23:03,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:23:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-05-03 16:23:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-05-03 16:23:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-05-03 16:23:03,253 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-05-03 16:23:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:03,253 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-05-03 16:23:03,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-05-03 16:23:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 16:23:03,257 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:03,257 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:03,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 16:23:03,473 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438650, now seen corresponding path program 7 times [2021-05-03 16:23:03,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:03,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519705456] [2021-05-03 16:23:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:23:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519705456] [2021-05-03 16:23:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277633480] [2021-05-03 16:23:03,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:23:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:23:03,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:03,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-03 16:23:03,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307188848] [2021-05-03 16:23:03,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:23:03,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:03,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:23:03,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:23:03,647 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:03,728 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-05-03 16:23:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:23:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 16:23:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:03,738 INFO L225 Difference]: With dead ends: 3393 [2021-05-03 16:23:03,738 INFO L226 Difference]: Without dead ends: 3242 [2021-05-03 16:23:03,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:23:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-05-03 16:23:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-05-03 16:23:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-05-03 16:23:03,803 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-05-03 16:23:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:03,803 INFO L480 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-05-03 16:23:03,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-05-03 16:23:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 16:23:03,810 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:03,810 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:04,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 16:23:04,025 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash 415909830, now seen corresponding path program 8 times [2021-05-03 16:23:04,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:04,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928051567] [2021-05-03 16:23:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:04,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928051567] [2021-05-03 16:23:04,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546674049] [2021-05-03 16:23:04,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:04,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:23:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:23:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:04,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:04,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-03 16:23:04,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252174653] [2021-05-03 16:23:04,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:23:04,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:04,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:23:04,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:23:04,178 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:04,260 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-05-03 16:23:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:23:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 16:23:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:04,275 INFO L225 Difference]: With dead ends: 5257 [2021-05-03 16:23:04,275 INFO L226 Difference]: Without dead ends: 5006 [2021-05-03 16:23:04,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:23:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-05-03 16:23:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-05-03 16:23:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-05-03 16:23:04,387 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-05-03 16:23:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-05-03 16:23:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-05-03 16:23:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:04,397 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:04,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:04,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 16:23:04,613 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:04,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1135351718, now seen corresponding path program 9 times [2021-05-03 16:23:04,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:04,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924397342] [2021-05-03 16:23:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:23:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924397342] [2021-05-03 16:23:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176686186] [2021-05-03 16:23:04,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:23:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:23:04,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:04,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:23:04,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32942379] [2021-05-03 16:23:04,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:23:04,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:23:04,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:23:04,798 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:05,146 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-05-03 16:23:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:23:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:05,197 INFO L225 Difference]: With dead ends: 16323 [2021-05-03 16:23:05,197 INFO L226 Difference]: Without dead ends: 13965 [2021-05-03 16:23:05,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:23:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-05-03 16:23:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-05-03 16:23:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-05-03 16:23:05,640 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-05-03 16:23:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:05,641 INFO L480 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-05-03 16:23:05,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-05-03 16:23:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:05,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:05,667 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:05,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 16:23:05,887 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1002610221, now seen corresponding path program 10 times [2021-05-03 16:23:05,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:05,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617950776] [2021-05-03 16:23:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:23:05,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617950776] [2021-05-03 16:23:05,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726473398] [2021-05-03 16:23:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:05,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:05,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:23:06,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:06,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:23:06,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368875117] [2021-05-03 16:23:06,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:23:06,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:06,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:23:06,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:23:06,098 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:06,559 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-05-03 16:23:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:23:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:06,622 INFO L225 Difference]: With dead ends: 18970 [2021-05-03 16:23:06,622 INFO L226 Difference]: Without dead ends: 18531 [2021-05-03 16:23:06,623 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:23:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-05-03 16:23:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-05-03 16:23:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-05-03 16:23:07,213 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-05-03 16:23:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:07,213 INFO L480 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-05-03 16:23:07,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-05-03 16:23:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:07,247 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:07,247 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:07,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:07,461 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash 614978514, now seen corresponding path program 11 times [2021-05-03 16:23:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:07,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142905572] [2021-05-03 16:23:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:07,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142905572] [2021-05-03 16:23:07,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938159725] [2021-05-03 16:23:07,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:07,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:23:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:07,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:07,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:07,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:23:07,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405315852] [2021-05-03 16:23:07,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:23:07,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:07,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:23:07,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:23:07,760 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:08,060 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-05-03 16:23:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:23:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:08,156 INFO L225 Difference]: With dead ends: 18432 [2021-05-03 16:23:08,157 INFO L226 Difference]: Without dead ends: 18354 [2021-05-03 16:23:08,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:23:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-05-03 16:23:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-05-03 16:23:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-05-03 16:23:08,639 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-05-03 16:23:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:08,640 INFO L480 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-05-03 16:23:08,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-05-03 16:23:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:08,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:08,680 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:08,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:08,893 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash 307309967, now seen corresponding path program 12 times [2021-05-03 16:23:08,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:08,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386577073] [2021-05-03 16:23:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:23:08,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386577073] [2021-05-03 16:23:08,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240847596] [2021-05-03 16:23:08,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:08,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:23:08,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:08,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:23:09,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:09,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:23:09,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73738664] [2021-05-03 16:23:09,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:23:09,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:23:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:23:09,114 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:09,477 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-05-03 16:23:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:23:09,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:09,530 INFO L225 Difference]: With dead ends: 20371 [2021-05-03 16:23:09,530 INFO L226 Difference]: Without dead ends: 18706 [2021-05-03 16:23:09,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:23:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-05-03 16:23:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-05-03 16:23:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-05-03 16:23:10,067 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-05-03 16:23:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:10,068 INFO L480 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-05-03 16:23:10,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-05-03 16:23:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:10,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:10,109 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:10,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 16:23:10,325 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash -749871114, now seen corresponding path program 13 times [2021-05-03 16:23:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:10,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508307635] [2021-05-03 16:23:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:23:10,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508307635] [2021-05-03 16:23:10,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948915650] [2021-05-03 16:23:10,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:10,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:10,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:23:10,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583461124] [2021-05-03 16:23:10,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:23:10,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:23:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:23:10,499 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:11,053 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-05-03 16:23:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:23:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:11,168 INFO L225 Difference]: With dead ends: 29290 [2021-05-03 16:23:11,169 INFO L226 Difference]: Without dead ends: 27668 [2021-05-03 16:23:11,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:23:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-05-03 16:23:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-05-03 16:23:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-05-03 16:23:11,932 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-05-03 16:23:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:11,932 INFO L480 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-05-03 16:23:11,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-05-03 16:23:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:11,978 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:11,978 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:12,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:12,179 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1681290952, now seen corresponding path program 14 times [2021-05-03 16:23:12,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:12,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270624742] [2021-05-03 16:23:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:23:12,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270624742] [2021-05-03 16:23:12,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868225354] [2021-05-03 16:23:12,234 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 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 [2021-05-03 16:23:12,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:23:12,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:12,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:12,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:12,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:12,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:23:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393865024] [2021-05-03 16:23:12,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:23:12,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:12,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:23:12,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:23:12,381 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:12,800 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-05-03 16:23:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:23:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:13,104 INFO L225 Difference]: With dead ends: 27112 [2021-05-03 16:23:13,120 INFO L226 Difference]: Without dead ends: 26976 [2021-05-03 16:23:13,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:23:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-05-03 16:23:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-05-03 16:23:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-05-03 16:23:13,788 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-05-03 16:23:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:13,789 INFO L480 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-05-03 16:23:13,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-05-03 16:23:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:13,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:13,843 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:14,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 16:23:14,044 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:14,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1329276436, now seen corresponding path program 15 times [2021-05-03 16:23:14,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:14,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122708921] [2021-05-03 16:23:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:14,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122708921] [2021-05-03 16:23:14,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289568159] [2021-05-03 16:23:14,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:14,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:23:14,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:14,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:23:14,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:14,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:23:14,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236446527] [2021-05-03 16:23:14,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:23:14,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:14,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:23:14,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:23:14,216 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:14,652 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-05-03 16:23:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:23:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:14,750 INFO L225 Difference]: With dead ends: 30228 [2021-05-03 16:23:14,750 INFO L226 Difference]: Without dead ends: 30070 [2021-05-03 16:23:14,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:23:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-05-03 16:23:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-05-03 16:23:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-05-03 16:23:15,658 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-05-03 16:23:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:15,658 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-05-03 16:23:15,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-05-03 16:23:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:23:15,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:15,725 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:15,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 16:23:15,926 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash 190972073, now seen corresponding path program 16 times [2021-05-03 16:23:15,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768773569] [2021-05-03 16:23:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:23:15,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768773569] [2021-05-03 16:23:15,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583993022] [2021-05-03 16:23:15,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:15,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:15,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:15,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:23:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:23:16,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:16,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:23:16,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661735585] [2021-05-03 16:23:16,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:23:16,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:23:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:23:16,065 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:16,447 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-05-03 16:23:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:23:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:23:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:16,549 INFO L225 Difference]: With dead ends: 28338 [2021-05-03 16:23:16,549 INFO L226 Difference]: Without dead ends: 28230 [2021-05-03 16:23:16,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:23:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-05-03 16:23:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-05-03 16:23:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-05-03 16:23:17,339 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-05-03 16:23:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:17,339 INFO L480 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-05-03 16:23:17,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-05-03 16:23:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:23:17,389 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:17,389 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:17,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 16:23:17,589 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash 832677239, now seen corresponding path program 17 times [2021-05-03 16:23:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:17,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483862462] [2021-05-03 16:23:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 16:23:17,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483862462] [2021-05-03 16:23:17,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176190931] [2021-05-03 16:23:17,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:17,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:23:17,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:23:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 16:23:17,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:17,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 16:23:17,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192761680] [2021-05-03 16:23:17,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:23:17,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:17,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:23:17,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:23:17,722 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:17,906 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-05-03 16:23:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:23:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:23:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:18,013 INFO L225 Difference]: With dead ends: 29898 [2021-05-03 16:23:18,014 INFO L226 Difference]: Without dead ends: 29898 [2021-05-03 16:23:18,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:23:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-05-03 16:23:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-05-03 16:23:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-05-03 16:23:18,819 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-05-03 16:23:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:18,819 INFO L480 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-05-03 16:23:18,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-05-03 16:23:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:23:18,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:18,872 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:19,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 16:23:19,073 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash -97394957, now seen corresponding path program 18 times [2021-05-03 16:23:19,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:19,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343655084] [2021-05-03 16:23:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-03 16:23:19,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343655084] [2021-05-03 16:23:19,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138437887] [2021-05-03 16:23:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:19,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:23:19,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:23:19,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-03 16:23:19,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:19,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 16:23:19,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464231315] [2021-05-03 16:23:19,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:23:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:23:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:23:19,187 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:19,718 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-05-03 16:23:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:23:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:23:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:19,889 INFO L225 Difference]: With dead ends: 37062 [2021-05-03 16:23:19,889 INFO L226 Difference]: Without dead ends: 37062 [2021-05-03 16:23:19,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:23:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-05-03 16:23:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-05-03 16:23:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-05-03 16:23:20,977 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-05-03 16:23:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:20,977 INFO L480 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-05-03 16:23:20,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-05-03 16:23:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:21,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:21,066 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:21,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 16:23:21,273 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:21,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:21,273 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 19 times [2021-05-03 16:23:21,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:21,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958064993] [2021-05-03 16:23:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:21,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958064993] [2021-05-03 16:23:21,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544085289] [2021-05-03 16:23:21,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:21,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:21,956 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:21,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:23:21,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:21,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:21,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:21,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-05-03 16:23:22,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:23:22,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:22,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:22,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:22,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-05-03 16:23:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:22,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:22,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:23:22,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026263359] [2021-05-03 16:23:22,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:23:22,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:22,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:23:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:23:22,152 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:24,119 INFO L93 Difference]: Finished difference Result 68650 states and 282459 transitions. [2021-05-03 16:23:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:23:24,120 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:24,446 INFO L225 Difference]: With dead ends: 68650 [2021-05-03 16:23:24,446 INFO L226 Difference]: Without dead ends: 68595 [2021-05-03 16:23:24,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1072.3ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:23:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-05-03 16:23:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 35386. [2021-05-03 16:23:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.1413310724883425) internal successors, (146541), 35385 states have internal predecessors, (146541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 146541 transitions. [2021-05-03 16:23:25,902 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 146541 transitions. Word has length 39 [2021-05-03 16:23:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:25,902 INFO L480 AbstractCegarLoop]: Abstraction has 35386 states and 146541 transitions. [2021-05-03 16:23:25,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 146541 transitions. [2021-05-03 16:23:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:25,992 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:25,992 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:26,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:26,193 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 20 times [2021-05-03 16:23:26,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:26,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876084091] [2021-05-03 16:23:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:26,751 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 16:23:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:26,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876084091] [2021-05-03 16:23:26,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232786326] [2021-05-03 16:23:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:27,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:23:27,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:27,183 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:27,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:23:27,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:27,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:27,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:27,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-05-03 16:23:27,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:23:27,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:27,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:27,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:27,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:23:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:27,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:27,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:23:27,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990456941] [2021-05-03 16:23:27,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:23:27,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:23:27,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:23:27,374 INFO L87 Difference]: Start difference. First operand 35386 states and 146541 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:29,429 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 16:23:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:29,887 INFO L93 Difference]: Finished difference Result 63622 states and 260156 transitions. [2021-05-03 16:23:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:23:29,888 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:30,144 INFO L225 Difference]: With dead ends: 63622 [2021-05-03 16:23:30,145 INFO L226 Difference]: Without dead ends: 63406 [2021-05-03 16:23:30,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1895.4ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:23:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63406 states. [2021-05-03 16:23:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63406 to 35493. [2021-05-03 16:23:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35493 states, 35492 states have (on average 4.143947931928322) internal successors, (147077), 35492 states have internal predecessors, (147077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 147077 transitions. [2021-05-03 16:23:31,494 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 147077 transitions. Word has length 39 [2021-05-03 16:23:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:31,494 INFO L480 AbstractCegarLoop]: Abstraction has 35493 states and 147077 transitions. [2021-05-03 16:23:31,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 147077 transitions. [2021-05-03 16:23:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:31,581 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:31,581 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:31,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 16:23:31,781 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 21 times [2021-05-03 16:23:31,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:31,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204523997] [2021-05-03 16:23:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:32,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204523997] [2021-05-03 16:23:32,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483525804] [2021-05-03 16:23:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:32,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:23:32,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:23:32,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:32,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:32,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:23:32,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:32,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:32,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:32,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:81 [2021-05-03 16:23:32,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:32,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-05-03 16:23:32,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:32,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:32,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:32,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-05-03 16:23:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:32,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:32,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:23:32,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917128688] [2021-05-03 16:23:32,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:23:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:23:32,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:23:32,938 INFO L87 Difference]: Start difference. First operand 35493 states and 147077 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:33,316 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:23:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:35,812 INFO L93 Difference]: Finished difference Result 59288 states and 241076 transitions. [2021-05-03 16:23:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:23:35,812 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:36,017 INFO L225 Difference]: With dead ends: 59288 [2021-05-03 16:23:36,018 INFO L226 Difference]: Without dead ends: 59124 [2021-05-03 16:23:36,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1904.2ms TimeCoverageRelationStatistics Valid=530, Invalid=2020, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:23:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2021-05-03 16:23:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 35683. [2021-05-03 16:23:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35683 states, 35682 states have (on average 4.1406031052071075) internal successors, (147745), 35682 states have internal predecessors, (147745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35683 states to 35683 states and 147745 transitions. [2021-05-03 16:23:37,311 INFO L78 Accepts]: Start accepts. Automaton has 35683 states and 147745 transitions. Word has length 39 [2021-05-03 16:23:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:37,312 INFO L480 AbstractCegarLoop]: Abstraction has 35683 states and 147745 transitions. [2021-05-03 16:23:37,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35683 states and 147745 transitions. [2021-05-03 16:23:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:37,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:37,407 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:37,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:37,607 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1267064945, now seen corresponding path program 22 times [2021-05-03 16:23:37,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:37,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361103366] [2021-05-03 16:23:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:38,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361103366] [2021-05-03 16:23:38,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013914221] [2021-05-03 16:23:38,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:38,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:38,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:38,274 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:38,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:23:38,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:38,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:38,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:38,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-05-03 16:23:38,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:23:38,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:38,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:38,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:38,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:23:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:38,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:38,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:23:38,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912431739] [2021-05-03 16:23:38,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:23:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:23:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:23:38,537 INFO L87 Difference]: Start difference. First operand 35683 states and 147745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:41,111 INFO L93 Difference]: Finished difference Result 76962 states and 312761 transitions. [2021-05-03 16:23:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:23:41,112 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:41,395 INFO L225 Difference]: With dead ends: 76962 [2021-05-03 16:23:41,395 INFO L226 Difference]: Without dead ends: 76778 [2021-05-03 16:23:41,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1434.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:23:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76778 states. [2021-05-03 16:23:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76778 to 35521. [2021-05-03 16:23:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35521 states, 35520 states have (on average 4.1433277027027025) internal successors, (147171), 35520 states have internal predecessors, (147171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35521 states to 35521 states and 147171 transitions. [2021-05-03 16:23:42,826 INFO L78 Accepts]: Start accepts. Automaton has 35521 states and 147171 transitions. Word has length 39 [2021-05-03 16:23:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:42,826 INFO L480 AbstractCegarLoop]: Abstraction has 35521 states and 147171 transitions. [2021-05-03 16:23:42,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 35521 states and 147171 transitions. [2021-05-03 16:23:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:42,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:42,916 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:43,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 16:23:43,121 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 23 times [2021-05-03 16:23:43,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:43,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481525455] [2021-05-03 16:23:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:43,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481525455] [2021-05-03 16:23:43,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762386210] [2021-05-03 16:23:43,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:43,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:23:43,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:43,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:43,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:44,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:44,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:44,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-05-03 16:23:44,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:23:44,174 INFO L628 ElimStorePlain]: treesize reduction 22, result has 66.7 percent of original size [2021-05-03 16:23:44,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:44,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-05-03 16:23:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:23:44,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:44,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:44,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:44,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:23:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:44,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:23:44,465 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:23:44,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:44,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:44,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-05-03 16:23:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:44,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:44,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:23:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149520229] [2021-05-03 16:23:44,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:23:44,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:44,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:23:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:23:44,494 INFO L87 Difference]: Start difference. First operand 35521 states and 147171 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:47,587 INFO L93 Difference]: Finished difference Result 62455 states and 255118 transitions. [2021-05-03 16:23:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:23:47,588 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:47,850 INFO L225 Difference]: With dead ends: 62455 [2021-05-03 16:23:47,851 INFO L226 Difference]: Without dead ends: 62400 [2021-05-03 16:23:47,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1807.7ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:23:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62400 states. [2021-05-03 16:23:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62400 to 36126. [2021-05-03 16:23:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36126 states, 36125 states have (on average 4.140013840830449) internal successors, (149558), 36125 states have internal predecessors, (149558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 149558 transitions. [2021-05-03 16:23:49,170 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 149558 transitions. Word has length 39 [2021-05-03 16:23:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:49,170 INFO L480 AbstractCegarLoop]: Abstraction has 36126 states and 149558 transitions. [2021-05-03 16:23:49,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 149558 transitions. [2021-05-03 16:23:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:49,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:49,264 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:49,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 16:23:49,465 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 24 times [2021-05-03 16:23:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:49,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665816767] [2021-05-03 16:23:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665816767] [2021-05-03 16:23:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653484069] [2021-05-03 16:23:49,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:49,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:23:49,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:49,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:23:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:50,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:50,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-05-03 16:23:50,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:50,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:50,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:50,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-05-03 16:23:50,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:23:50,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:50,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:50,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:50,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:23:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:50,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:50,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:23:50,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219425553] [2021-05-03 16:23:50,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:23:50,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:23:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:23:50,572 INFO L87 Difference]: Start difference. First operand 36126 states and 149558 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:53,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:53,383 INFO L93 Difference]: Finished difference Result 62047 states and 253181 transitions. [2021-05-03 16:23:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:23:53,384 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:53,624 INFO L225 Difference]: With dead ends: 62047 [2021-05-03 16:23:53,625 INFO L226 Difference]: Without dead ends: 61919 [2021-05-03 16:23:53,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2222.9ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 16:23:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61919 states. [2021-05-03 16:23:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61919 to 36244. [2021-05-03 16:23:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36244 states, 36243 states have (on average 4.138454322213945) internal successors, (149990), 36243 states have internal predecessors, (149990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36244 states to 36244 states and 149990 transitions. [2021-05-03 16:23:54,962 INFO L78 Accepts]: Start accepts. Automaton has 36244 states and 149990 transitions. Word has length 39 [2021-05-03 16:23:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:54,962 INFO L480 AbstractCegarLoop]: Abstraction has 36244 states and 149990 transitions. [2021-05-03 16:23:54,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 36244 states and 149990 transitions. [2021-05-03 16:23:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:55,350 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:55,351 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:23:55,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-03 16:23:55,575 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:55,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:55,575 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 25 times [2021-05-03 16:23:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:55,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744061061] [2021-05-03 16:23:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:56,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744061061] [2021-05-03 16:23:56,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802833102] [2021-05-03 16:23:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:56,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:56,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:56,270 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:56,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:23:56,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:56,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:56,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:56,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:23:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:23:56,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:56,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:56,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:56,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:23:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:56,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:56,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:23:56,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056881484] [2021-05-03 16:23:56,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:23:56,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:23:56,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:23:56,494 INFO L87 Difference]: Start difference. First operand 36244 states and 149990 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:58,655 INFO L93 Difference]: Finished difference Result 63583 states and 260022 transitions. [2021-05-03 16:23:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:23:58,656 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:58,933 INFO L225 Difference]: With dead ends: 63583 [2021-05-03 16:23:58,933 INFO L226 Difference]: Without dead ends: 63391 [2021-05-03 16:23:58,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1327.8ms TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:23:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63391 states. [2021-05-03 16:24:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63391 to 36222. [2021-05-03 16:24:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36222 states, 36221 states have (on average 4.139007757930482) internal successors, (149919), 36221 states have internal predecessors, (149919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36222 states to 36222 states and 149919 transitions. [2021-05-03 16:24:00,274 INFO L78 Accepts]: Start accepts. Automaton has 36222 states and 149919 transitions. Word has length 39 [2021-05-03 16:24:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:00,274 INFO L480 AbstractCegarLoop]: Abstraction has 36222 states and 149919 transitions. [2021-05-03 16:24:00,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 36222 states and 149919 transitions. [2021-05-03 16:24:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:00,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:00,368 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:00,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:00,573 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash 337270923, now seen corresponding path program 26 times [2021-05-03 16:24:00,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:00,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987562980] [2021-05-03 16:24:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:00,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987562980] [2021-05-03 16:24:00,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802363072] [2021-05-03 16:24:00,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:00,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:24:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:01,155 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:01,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:24:01,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:01,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:01,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:01,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:24:01,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:24:01,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:01,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:01,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:01,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-05-03 16:24:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:01,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:01,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134937762] [2021-05-03 16:24:01,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:01,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:01,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:01,301 INFO L87 Difference]: Start difference. First operand 36222 states and 149919 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:03,672 INFO L93 Difference]: Finished difference Result 90257 states and 367920 transitions. [2021-05-03 16:24:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:24:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:03,958 INFO L225 Difference]: With dead ends: 90257 [2021-05-03 16:24:03,958 INFO L226 Difference]: Without dead ends: 90202 [2021-05-03 16:24:03,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:24:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90202 states. [2021-05-03 16:24:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90202 to 36036. [2021-05-03 16:24:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.137810462050784) internal successors, (149106), 36035 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 149106 transitions. [2021-05-03 16:24:05,766 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 149106 transitions. Word has length 39 [2021-05-03 16:24:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:05,766 INFO L480 AbstractCegarLoop]: Abstraction has 36036 states and 149106 transitions. [2021-05-03 16:24:05,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 149106 transitions. [2021-05-03 16:24:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:05,866 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:05,866 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:06,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 16:24:06,067 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash -571608753, now seen corresponding path program 27 times [2021-05-03 16:24:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:06,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95734119] [2021-05-03 16:24:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:06,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95734119] [2021-05-03 16:24:06,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785511798] [2021-05-03 16:24:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:06,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:24:06,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:24:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:06,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:06,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:24:06,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:06,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:06,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:06,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:89 [2021-05-03 16:24:07,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:24:07,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:07,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:07,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:24:07,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:16 [2021-05-03 16:24:07,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:07,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:24:07,061 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:24:07,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:07,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:07,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-05-03 16:24:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:07,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:07,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:24:07,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020798510] [2021-05-03 16:24:07,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:24:07,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:24:07,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:24:07,096 INFO L87 Difference]: Start difference. First operand 36036 states and 149106 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:10,792 INFO L93 Difference]: Finished difference Result 76321 states and 309332 transitions. [2021-05-03 16:24:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:24:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:11,075 INFO L225 Difference]: With dead ends: 76321 [2021-05-03 16:24:11,076 INFO L226 Difference]: Without dead ends: 76049 [2021-05-03 16:24:11,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2333.3ms TimeCoverageRelationStatistics Valid=484, Invalid=2708, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 16:24:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76049 states. [2021-05-03 16:24:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76049 to 35555. [2021-05-03 16:24:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35555 states, 35554 states have (on average 4.1431906395904825) internal successors, (147307), 35554 states have internal predecessors, (147307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35555 states to 35555 states and 147307 transitions. [2021-05-03 16:24:12,437 INFO L78 Accepts]: Start accepts. Automaton has 35555 states and 147307 transitions. Word has length 39 [2021-05-03 16:24:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:12,437 INFO L480 AbstractCegarLoop]: Abstraction has 35555 states and 147307 transitions. [2021-05-03 16:24:12,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 35555 states and 147307 transitions. [2021-05-03 16:24:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:12,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:12,521 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:12,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:12,722 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:12,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:12,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 28 times [2021-05-03 16:24:12,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:12,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303781897] [2021-05-03 16:24:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:13,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303781897] [2021-05-03 16:24:13,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002549667] [2021-05-03 16:24:13,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:13,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:24:13,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:13,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:13,396 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:13,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:24:13,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:13,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-05-03 16:24:13,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:24:13,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:13,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-05-03 16:24:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:13,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:13,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:24:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049038324] [2021-05-03 16:24:13,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:24:13,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:13,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:24:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:24:13,807 INFO L87 Difference]: Start difference. First operand 35555 states and 147307 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:15,667 INFO L93 Difference]: Finished difference Result 69258 states and 285506 transitions. [2021-05-03 16:24:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:24:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:15,933 INFO L225 Difference]: With dead ends: 69258 [2021-05-03 16:24:15,934 INFO L226 Difference]: Without dead ends: 69203 [2021-05-03 16:24:15,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1052.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:24:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69203 states. [2021-05-03 16:24:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69203 to 35829. [2021-05-03 16:24:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35829 states, 35828 states have (on average 4.142095567712404) internal successors, (148403), 35828 states have internal predecessors, (148403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35829 states to 35829 states and 148403 transitions. [2021-05-03 16:24:17,343 INFO L78 Accepts]: Start accepts. Automaton has 35829 states and 148403 transitions. Word has length 39 [2021-05-03 16:24:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:17,343 INFO L480 AbstractCegarLoop]: Abstraction has 35829 states and 148403 transitions. [2021-05-03 16:24:17,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 35829 states and 148403 transitions. [2021-05-03 16:24:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:17,432 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:17,433 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:17,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:17,633 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:17,634 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 29 times [2021-05-03 16:24:17,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:17,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404651655] [2021-05-03 16:24:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:18,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404651655] [2021-05-03 16:24:18,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736311587] [2021-05-03 16:24:18,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:18,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:24:18,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 16:24:18,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:24:19,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:19,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:19,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:24:19,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:47 [2021-05-03 16:24:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:19,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:19,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:24:19,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:19,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:19,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:19,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:13 [2021-05-03 16:24:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:19,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:19,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:24:19,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904510626] [2021-05-03 16:24:19,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:24:19,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:24:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:24:19,624 INFO L87 Difference]: Start difference. First operand 35829 states and 148403 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:23,914 INFO L93 Difference]: Finished difference Result 62177 states and 253641 transitions. [2021-05-03 16:24:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:24:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:24,155 INFO L225 Difference]: With dead ends: 62177 [2021-05-03 16:24:24,155 INFO L226 Difference]: Without dead ends: 61975 [2021-05-03 16:24:24,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2714.8ms TimeCoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:24:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61975 states. [2021-05-03 16:24:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61975 to 36176. [2021-05-03 16:24:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36176 states, 36175 states have (on average 4.138078783690394) internal successors, (149695), 36175 states have internal predecessors, (149695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36176 states to 36176 states and 149695 transitions. [2021-05-03 16:24:25,426 INFO L78 Accepts]: Start accepts. Automaton has 36176 states and 149695 transitions. Word has length 39 [2021-05-03 16:24:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:25,426 INFO L480 AbstractCegarLoop]: Abstraction has 36176 states and 149695 transitions. [2021-05-03 16:24:25,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 36176 states and 149695 transitions. [2021-05-03 16:24:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:25,518 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:25,518 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:25,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-03 16:24:25,718 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 30 times [2021-05-03 16:24:25,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:25,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139559450] [2021-05-03 16:24:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:26,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139559450] [2021-05-03 16:24:26,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230913426] [2021-05-03 16:24:26,258 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:26,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:24:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:24:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:26,541 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:26,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:24:26,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:26,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:26,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:26,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-05-03 16:24:26,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:24:26,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:26,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:26,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:26,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:24:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:26,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:26,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:26,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684220017] [2021-05-03 16:24:26,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:26,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:26,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:26,711 INFO L87 Difference]: Start difference. First operand 36176 states and 149695 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:27,254 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:24:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:29,903 INFO L93 Difference]: Finished difference Result 78317 states and 318209 transitions. [2021-05-03 16:24:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:24:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:30,967 INFO L225 Difference]: With dead ends: 78317 [2021-05-03 16:24:30,968 INFO L226 Difference]: Without dead ends: 78101 [2021-05-03 16:24:30,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1929.9ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:24:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78101 states. [2021-05-03 16:24:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78101 to 35679. [2021-05-03 16:24:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35679 states, 35678 states have (on average 4.143029317786872) internal successors, (147815), 35678 states have internal predecessors, (147815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35679 states to 35679 states and 147815 transitions. [2021-05-03 16:24:33,300 INFO L78 Accepts]: Start accepts. Automaton has 35679 states and 147815 transitions. Word has length 39 [2021-05-03 16:24:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:33,300 INFO L480 AbstractCegarLoop]: Abstraction has 35679 states and 147815 transitions. [2021-05-03 16:24:33,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 35679 states and 147815 transitions. [2021-05-03 16:24:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:33,417 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:33,417 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:33,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:33,637 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 31 times [2021-05-03 16:24:33,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:33,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321371505] [2021-05-03 16:24:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:34,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321371505] [2021-05-03 16:24:34,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354686187] [2021-05-03 16:24:34,409 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:34,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:34,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:34,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:24:34,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:34,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:34,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:34,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:24:35,040 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:35,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-05-03 16:24:35,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:35,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:35,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:35,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-05-03 16:24:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:35,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:35,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:24:35,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048007915] [2021-05-03 16:24:35,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:24:35,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:35,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:24:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:24:35,150 INFO L87 Difference]: Start difference. First operand 35679 states and 147815 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:38,491 INFO L93 Difference]: Finished difference Result 71308 states and 293693 transitions. [2021-05-03 16:24:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:24:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:38,861 INFO L225 Difference]: With dead ends: 71308 [2021-05-03 16:24:38,861 INFO L226 Difference]: Without dead ends: 71253 [2021-05-03 16:24:38,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1751.2ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:24:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71253 states. [2021-05-03 16:24:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71253 to 36115. [2021-05-03 16:24:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36115 states, 36114 states have (on average 4.146120618042865) internal successors, (149733), 36114 states have internal predecessors, (149733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36115 states to 36115 states and 149733 transitions. [2021-05-03 16:24:40,570 INFO L78 Accepts]: Start accepts. Automaton has 36115 states and 149733 transitions. Word has length 39 [2021-05-03 16:24:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:40,570 INFO L480 AbstractCegarLoop]: Abstraction has 36115 states and 149733 transitions. [2021-05-03 16:24:40,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 36115 states and 149733 transitions. [2021-05-03 16:24:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:40,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:40,661 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:40,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 16:24:40,861 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 32 times [2021-05-03 16:24:40,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:40,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621111533] [2021-05-03 16:24:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:41,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621111533] [2021-05-03 16:24:41,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089126431] [2021-05-03 16:24:41,226 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:41,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:24:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:24:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:41,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:24:41,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:41,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:41,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:41,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-05-03 16:24:41,655 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:41,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-05-03 16:24:41,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:41,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:41,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:41,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-05-03 16:24:41,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:41,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:24:41,720 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:24:41,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:41,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:24:41,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:24:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:41,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:41,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:24:41,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173413617] [2021-05-03 16:24:41,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:24:41,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:41,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:24:41,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:24:41,798 INFO L87 Difference]: Start difference. First operand 36115 states and 149733 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:45,232 INFO L93 Difference]: Finished difference Result 91528 states and 377511 transitions. [2021-05-03 16:24:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:24:45,233 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:45,588 INFO L225 Difference]: With dead ends: 91528 [2021-05-03 16:24:45,589 INFO L226 Difference]: Without dead ends: 91473 [2021-05-03 16:24:45,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1666.7ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:24:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91473 states. [2021-05-03 16:24:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91473 to 36355. [2021-05-03 16:24:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36355 states, 36354 states have (on average 4.147906695274248) internal successors, (150793), 36354 states have internal predecessors, (150793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36355 states to 36355 states and 150793 transitions. [2021-05-03 16:24:47,393 INFO L78 Accepts]: Start accepts. Automaton has 36355 states and 150793 transitions. Word has length 39 [2021-05-03 16:24:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:47,393 INFO L480 AbstractCegarLoop]: Abstraction has 36355 states and 150793 transitions. [2021-05-03 16:24:47,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 36355 states and 150793 transitions. [2021-05-03 16:24:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:47,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:47,478 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:47,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:47,679 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:47,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 33 times [2021-05-03 16:24:47,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:47,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884497930] [2021-05-03 16:24:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884497930] [2021-05-03 16:24:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367083443] [2021-05-03 16:24:48,493 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:48,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:24:48,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:48,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:24:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:48,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 16:24:48,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:48,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:48,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:48,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-05-03 16:24:49,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:49,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:49,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-05-03 16:24:49,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:49,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:49,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:24:49,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-05-03 16:24:49,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:49,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:24:49,155 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:24:49,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:49,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:49,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:24:49,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:49,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:49,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:24:49,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-05-03 16:24:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:49,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:49,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-05-03 16:24:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628947210] [2021-05-03 16:24:49,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:24:49,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:49,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:24:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:24:49,390 INFO L87 Difference]: Start difference. First operand 36355 states and 150793 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:55,609 INFO L93 Difference]: Finished difference Result 96064 states and 394680 transitions. [2021-05-03 16:24:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 16:24:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:56,283 INFO L225 Difference]: With dead ends: 96064 [2021-05-03 16:24:56,283 INFO L226 Difference]: Without dead ends: 95970 [2021-05-03 16:24:56,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3908.9ms TimeCoverageRelationStatistics Valid=780, Invalid=5226, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 16:24:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95970 states. [2021-05-03 16:24:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95970 to 37015. [2021-05-03 16:24:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37015 states, 37014 states have (on average 4.146566164154104) internal successors, (153481), 37014 states have internal predecessors, (153481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37015 states to 37015 states and 153481 transitions. [2021-05-03 16:24:58,032 INFO L78 Accepts]: Start accepts. Automaton has 37015 states and 153481 transitions. Word has length 39 [2021-05-03 16:24:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:58,032 INFO L480 AbstractCegarLoop]: Abstraction has 37015 states and 153481 transitions. [2021-05-03 16:24:58,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 37015 states and 153481 transitions. [2021-05-03 16:24:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:58,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:58,114 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:24:58,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 16:24:58,315 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -555822351, now seen corresponding path program 34 times [2021-05-03 16:24:58,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:58,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201697862] [2021-05-03 16:24:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:58,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201697862] [2021-05-03 16:24:58,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079042571] [2021-05-03 16:24:58,679 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:58,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:24:58,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:58,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:24:58,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:58,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:58,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:58,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:24:58,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:58,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:24:58,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:58,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:58,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:58,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:24:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:59,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:59,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:59,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914971363] [2021-05-03 16:24:59,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:59,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:59,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:59,050 INFO L87 Difference]: Start difference. First operand 37015 states and 153481 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:01,807 INFO L93 Difference]: Finished difference Result 106237 states and 431864 transitions. [2021-05-03 16:25:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:25:01,808 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:02,196 INFO L225 Difference]: With dead ends: 106237 [2021-05-03 16:25:02,197 INFO L226 Difference]: Without dead ends: 106182 [2021-05-03 16:25:02,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1388.0ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:25:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106182 states. [2021-05-03 16:25:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106182 to 36507. [2021-05-03 16:25:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36507 states, 36506 states have (on average 4.150577987180189) internal successors, (151521), 36506 states have internal predecessors, (151521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36507 states to 36507 states and 151521 transitions. [2021-05-03 16:25:04,070 INFO L78 Accepts]: Start accepts. Automaton has 36507 states and 151521 transitions. Word has length 39 [2021-05-03 16:25:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:04,070 INFO L480 AbstractCegarLoop]: Abstraction has 36507 states and 151521 transitions. [2021-05-03 16:25:04,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 36507 states and 151521 transitions. [2021-05-03 16:25:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:04,693 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:04,693 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:25:04,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 16:25:04,896 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 35 times [2021-05-03 16:25:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:04,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530702080] [2021-05-03 16:25:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:05,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530702080] [2021-05-03 16:25:05,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944436823] [2021-05-03 16:25:05,530 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:05,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:25:05,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:25:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:06,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-05-03 16:25:06,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:25:06,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:06,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:06,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:59 [2021-05-03 16:25:06,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:06,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 16:25:06,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:06,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:06,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:06,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-05-03 16:25:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:06,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:06,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:25:06,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:25:06,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:06,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:06,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:25:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:06,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:06,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:25:06,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983274252] [2021-05-03 16:25:06,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:25:06,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:25:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:25:06,841 INFO L87 Difference]: Start difference. First operand 36507 states and 151521 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:11,789 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-05-03 16:25:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:12,732 INFO L93 Difference]: Finished difference Result 68781 states and 280972 transitions. [2021-05-03 16:25:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 16:25:12,733 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:12,998 INFO L225 Difference]: With dead ends: 68781 [2021-05-03 16:25:12,999 INFO L226 Difference]: Without dead ends: 68560 [2021-05-03 16:25:13,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 4441.6ms TimeCoverageRelationStatistics Valid=732, Invalid=4380, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 16:25:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68560 states. [2021-05-03 16:25:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68560 to 37012. [2021-05-03 16:25:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37012 states, 37011 states have (on average 4.144254410850828) internal successors, (153383), 37011 states have internal predecessors, (153383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37012 states to 37012 states and 153383 transitions. [2021-05-03 16:25:14,527 INFO L78 Accepts]: Start accepts. Automaton has 37012 states and 153383 transitions. Word has length 39 [2021-05-03 16:25:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:14,527 INFO L480 AbstractCegarLoop]: Abstraction has 37012 states and 153383 transitions. [2021-05-03 16:25:14,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 37012 states and 153383 transitions. [2021-05-03 16:25:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:14,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:14,635 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:25:14,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:14,837 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1669092457, now seen corresponding path program 36 times [2021-05-03 16:25:14,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:14,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795350672] [2021-05-03 16:25:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:15,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795350672] [2021-05-03 16:25:15,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526314862] [2021-05-03 16:25:15,496 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:15,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:25:15,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:15,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:25:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:16,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:25:16,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-05-03 16:25:16,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:16,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:16,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:16,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-05-03 16:25:16,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:25:16,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:16,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:16,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:16,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:25:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:16,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:16,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:25:16,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100143784] [2021-05-03 16:25:16,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:25:16,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:25:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:25:16,610 INFO L87 Difference]: Start difference. First operand 37012 states and 153383 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:20,373 INFO L93 Difference]: Finished difference Result 79074 states and 321254 transitions. [2021-05-03 16:25:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:25:20,374 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:20,713 INFO L225 Difference]: With dead ends: 79074 [2021-05-03 16:25:20,713 INFO L226 Difference]: Without dead ends: 78850 [2021-05-03 16:25:20,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2646.0ms TimeCoverageRelationStatistics Valid=422, Invalid=2028, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:25:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78850 states. [2021-05-03 16:25:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78850 to 36693. [2021-05-03 16:25:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 4.1486155020167885) internal successors, (152221), 36692 states have internal predecessors, (152221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 152221 transitions. [2021-05-03 16:25:22,363 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 152221 transitions. Word has length 39 [2021-05-03 16:25:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:22,363 INFO L480 AbstractCegarLoop]: Abstraction has 36693 states and 152221 transitions. [2021-05-03 16:25:22,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 152221 transitions. [2021-05-03 16:25:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:22,464 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:22,464 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:25:22,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:22,689 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 37 times [2021-05-03 16:25:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:22,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663934915] [2021-05-03 16:25:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:23,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663934915] [2021-05-03 16:25:23,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139482594] [2021-05-03 16:25:23,223 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:25:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:23,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:25:23,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:23,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:23,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:23,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:25:23,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:25:23,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:25:23,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:23,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:23,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:23,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:25:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:23,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:23,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:25:23,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493952917] [2021-05-03 16:25:23,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:25:23,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:25:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:25:23,754 INFO L87 Difference]: Start difference. First operand 36693 states and 152221 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:26,915 INFO L93 Difference]: Finished difference Result 80869 states and 329178 transitions. [2021-05-03 16:25:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:25:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:27,267 INFO L225 Difference]: With dead ends: 80869 [2021-05-03 16:25:27,268 INFO L226 Difference]: Without dead ends: 80701 [2021-05-03 16:25:27,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2086.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:25:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80701 states. [2021-05-03 16:25:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80701 to 36755. [2021-05-03 16:25:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36755 states, 36754 states have (on average 4.149561952440551) internal successors, (152513), 36754 states have internal predecessors, (152513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36755 states to 36755 states and 152513 transitions. [2021-05-03 16:25:29,039 INFO L78 Accepts]: Start accepts. Automaton has 36755 states and 152513 transitions. Word has length 39 [2021-05-03 16:25:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:29,039 INFO L480 AbstractCegarLoop]: Abstraction has 36755 states and 152513 transitions. [2021-05-03 16:25:29,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 36755 states and 152513 transitions. [2021-05-03 16:25:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:29,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:29,128 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:25:29,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:29,329 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 38 times [2021-05-03 16:25:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:29,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752886246] [2021-05-03 16:25:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:29,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752886246] [2021-05-03 16:25:29,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394289104] [2021-05-03 16:25:29,889 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:29,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:25:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:29,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:25:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:30,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:25:30,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:30,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:30,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:30,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:25:30,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:25:30,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:25:30,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:30,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:30,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:30,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:25:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:30,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:30,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:25:30,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149722765] [2021-05-03 16:25:30,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:25:30,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:30,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:25:30,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:25:30,396 INFO L87 Difference]: Start difference. First operand 36755 states and 152513 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:30,936 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:25:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:33,042 INFO L93 Difference]: Finished difference Result 67634 states and 276737 transitions. [2021-05-03 16:25:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:25:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:33,313 INFO L225 Difference]: With dead ends: 67634 [2021-05-03 16:25:33,313 INFO L226 Difference]: Without dead ends: 67544 [2021-05-03 16:25:33,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1774.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:25:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67544 states. [2021-05-03 16:25:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67544 to 36721. [2021-05-03 16:25:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 36720 states have (on average 4.15291394335512) internal successors, (152495), 36720 states have internal predecessors, (152495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152495 transitions. [2021-05-03 16:25:34,880 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152495 transitions. Word has length 39 [2021-05-03 16:25:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:34,880 INFO L480 AbstractCegarLoop]: Abstraction has 36721 states and 152495 transitions. [2021-05-03 16:25:34,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152495 transitions. [2021-05-03 16:25:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:34,981 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:34,981 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:25:35,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-03 16:25:35,182 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:35,182 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 39 times [2021-05-03 16:25:35,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:35,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417104949] [2021-05-03 16:25:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:35,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417104949] [2021-05-03 16:25:35,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26776294] [2021-05-03 16:25:35,755 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:35,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:25:35,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:35,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:25:35,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:36,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-05-03 16:25:36,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:36,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:36,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:36,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-05-03 16:25:36,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:25:36,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:36,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:36,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:36,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:25:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:36,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:36,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:25:36,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509050752] [2021-05-03 16:25:36,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:25:36,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:25:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:25:36,922 INFO L87 Difference]: Start difference. First operand 36721 states and 152495 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:39,903 INFO L93 Difference]: Finished difference Result 61224 states and 250106 transitions. [2021-05-03 16:25:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:25:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:40,140 INFO L225 Difference]: With dead ends: 61224 [2021-05-03 16:25:40,140 INFO L226 Difference]: Without dead ends: 61096 [2021-05-03 16:25:40,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2386.3ms TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:25:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61096 states. [2021-05-03 16:25:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61096 to 37078. [2021-05-03 16:25:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37078 states, 37077 states have (on average 4.147342017962618) internal successors, (153771), 37077 states have internal predecessors, (153771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37078 states to 37078 states and 153771 transitions. [2021-05-03 16:25:41,538 INFO L78 Accepts]: Start accepts. Automaton has 37078 states and 153771 transitions. Word has length 39 [2021-05-03 16:25:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:41,538 INFO L480 AbstractCegarLoop]: Abstraction has 37078 states and 153771 transitions. [2021-05-03 16:25:41,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 37078 states and 153771 transitions. [2021-05-03 16:25:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:41,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:41,638 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:25:41,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:41,838 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:41,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2130742231, now seen corresponding path program 40 times [2021-05-03 16:25:41,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:41,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012101875] [2021-05-03 16:25:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:42,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012101875] [2021-05-03 16:25:42,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693196893] [2021-05-03 16:25:42,803 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:42,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:25:42,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:25:42,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:43,191 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:25:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-05-03 16:25:43,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:43,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:43,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:43,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:25:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:25:43,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:43,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:43,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:43,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:25:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:43,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:43,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:25:43,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313454909] [2021-05-03 16:25:43,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:25:43,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:25:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:25:43,409 INFO L87 Difference]: Start difference. First operand 37078 states and 153771 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:46,688 INFO L93 Difference]: Finished difference Result 78252 states and 318289 transitions. [2021-05-03 16:25:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:25:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:47,061 INFO L225 Difference]: With dead ends: 78252 [2021-05-03 16:25:47,061 INFO L226 Difference]: Without dead ends: 78068 [2021-05-03 16:25:47,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2396.6ms TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:25:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78068 states. [2021-05-03 16:25:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78068 to 36745. [2021-05-03 16:25:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36745 states, 36744 states have (on average 4.1524874809492704) internal successors, (152579), 36744 states have internal predecessors, (152579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36745 states to 36745 states and 152579 transitions. [2021-05-03 16:25:48,961 INFO L78 Accepts]: Start accepts. Automaton has 36745 states and 152579 transitions. Word has length 39 [2021-05-03 16:25:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:48,961 INFO L480 AbstractCegarLoop]: Abstraction has 36745 states and 152579 transitions. [2021-05-03 16:25:48,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36745 states and 152579 transitions. [2021-05-03 16:25:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:49,086 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:49,086 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:25:49,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:49,312 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 41 times [2021-05-03 16:25:49,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:49,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112544283] [2021-05-03 16:25:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:49,583 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-03 16:25:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:50,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112544283] [2021-05-03 16:25:50,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647014986] [2021-05-03 16:25:50,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:50,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:25:50,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:25:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:50,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:50,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:50,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:50,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-05-03 16:25:50,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:25:50,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:50,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:50,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:56 [2021-05-03 16:25:51,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:51,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:51,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:51,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:25:51,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:51,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:51,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:51,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:27 [2021-05-03 16:25:51,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:51,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:51,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:25:51,211 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:51,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:51,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:51,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:25:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:51,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:51,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:25:51,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618620892] [2021-05-03 16:25:51,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:25:51,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:51,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:25:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:25:51,359 INFO L87 Difference]: Start difference. First operand 36745 states and 152579 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:54,366 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 16:25:58,632 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-05-03 16:25:59,063 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-05-03 16:25:59,662 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-03 16:26:00,080 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-05-03 16:26:01,210 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-05-03 16:26:01,483 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2021-05-03 16:26:04,903 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-05-03 16:26:05,119 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-05-03 16:26:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:06,386 INFO L93 Difference]: Finished difference Result 81058 states and 330146 transitions. [2021-05-03 16:26:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-03 16:26:06,387 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:06,746 INFO L225 Difference]: With dead ends: 81058 [2021-05-03 16:26:06,747 INFO L226 Difference]: Without dead ends: 80725 [2021-05-03 16:26:06,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 10088.6ms TimeCoverageRelationStatistics Valid=1233, Invalid=10977, Unknown=0, NotChecked=0, Total=12210 [2021-05-03 16:26:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80725 states. [2021-05-03 16:26:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80725 to 37394. [2021-05-03 16:26:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37394 states, 37393 states have (on average 4.148236300911935) internal successors, (155115), 37393 states have internal predecessors, (155115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37394 states to 37394 states and 155115 transitions. [2021-05-03 16:26:08,833 INFO L78 Accepts]: Start accepts. Automaton has 37394 states and 155115 transitions. Word has length 39 [2021-05-03 16:26:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:08,834 INFO L480 AbstractCegarLoop]: Abstraction has 37394 states and 155115 transitions. [2021-05-03 16:26:08,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 37394 states and 155115 transitions. [2021-05-03 16:26:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:08,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:08,953 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:26:09,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:09,154 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 42 times [2021-05-03 16:26:09,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:09,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51429681] [2021-05-03 16:26:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:10,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51429681] [2021-05-03 16:26:10,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021801966] [2021-05-03 16:26:10,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:10,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:26:10,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:10,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:26:10,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:10,494 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:26:10,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-05-03 16:26:10,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:10,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:10,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:10,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-05-03 16:26:10,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:26:10,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:10,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:10,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:10,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:26:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:10,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:10,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:26:10,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716859655] [2021-05-03 16:26:10,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:26:10,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:10,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:26:10,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:26:10,665 INFO L87 Difference]: Start difference. First operand 37394 states and 155115 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:14,427 INFO L93 Difference]: Finished difference Result 79507 states and 323183 transitions. [2021-05-03 16:26:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:26:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:14,771 INFO L225 Difference]: With dead ends: 79507 [2021-05-03 16:26:14,771 INFO L226 Difference]: Without dead ends: 79283 [2021-05-03 16:26:14,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 2628.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:26:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79283 states. [2021-05-03 16:26:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79283 to 37270. [2021-05-03 16:26:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37270 states, 37269 states have (on average 4.150178432477394) internal successors, (154673), 37269 states have internal predecessors, (154673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37270 states to 37270 states and 154673 transitions. [2021-05-03 16:26:16,490 INFO L78 Accepts]: Start accepts. Automaton has 37270 states and 154673 transitions. Word has length 39 [2021-05-03 16:26:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:16,490 INFO L480 AbstractCegarLoop]: Abstraction has 37270 states and 154673 transitions. [2021-05-03 16:26:16,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37270 states and 154673 transitions. [2021-05-03 16:26:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:16,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:16,598 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:26:16,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:16,799 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 43 times [2021-05-03 16:26:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:16,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892009080] [2021-05-03 16:26:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:17,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892009080] [2021-05-03 16:26:17,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651193040] [2021-05-03 16:26:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:17,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:26:17,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:18,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:26:18,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:18,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:18,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:18,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:26:18,139 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:26:18,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:26:18,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:18,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:18,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:18,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:26:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:18,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:18,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:26:18,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786387117] [2021-05-03 16:26:18,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:26:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:26:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:26:18,237 INFO L87 Difference]: Start difference. First operand 37270 states and 154673 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:20,387 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 16:26:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:21,637 INFO L93 Difference]: Finished difference Result 81312 states and 331062 transitions. [2021-05-03 16:26:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:26:21,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:21,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:21,990 INFO L225 Difference]: With dead ends: 81312 [2021-05-03 16:26:21,990 INFO L226 Difference]: Without dead ends: 81160 [2021-05-03 16:26:21,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2598.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:26:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81160 states. [2021-05-03 16:26:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81160 to 37320. [2021-05-03 16:26:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37320 states, 37319 states have (on average 4.150620327447145) internal successors, (154897), 37319 states have internal predecessors, (154897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37320 states to 37320 states and 154897 transitions. [2021-05-03 16:26:23,732 INFO L78 Accepts]: Start accepts. Automaton has 37320 states and 154897 transitions. Word has length 39 [2021-05-03 16:26:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:23,733 INFO L480 AbstractCegarLoop]: Abstraction has 37320 states and 154897 transitions. [2021-05-03 16:26:23,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 37320 states and 154897 transitions. [2021-05-03 16:26:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:23,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:23,830 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:26:24,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:24,031 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 44 times [2021-05-03 16:26:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:24,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074793392] [2021-05-03 16:26:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:24,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074793392] [2021-05-03 16:26:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470766858] [2021-05-03 16:26:24,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:24,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:26:24,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:26:24,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:25,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:26:25,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:25,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:25,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:25,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:26:25,247 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:26:25,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:26:25,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:25,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:25,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:25,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:26:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:25,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:25,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:26:25,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984152626] [2021-05-03 16:26:25,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:26:25,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:25,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:26:25,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:26:25,338 INFO L87 Difference]: Start difference. First operand 37320 states and 154897 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:26,510 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:26:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:28,891 INFO L93 Difference]: Finished difference Result 68093 states and 278664 transitions. [2021-05-03 16:26:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:26:28,893 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:29,200 INFO L225 Difference]: With dead ends: 68093 [2021-05-03 16:26:29,200 INFO L226 Difference]: Without dead ends: 68003 [2021-05-03 16:26:29,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2277.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:26:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68003 states. [2021-05-03 16:26:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68003 to 37072. [2021-05-03 16:26:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37072 states, 37071 states have (on average 4.1516279571632815) internal successors, (153905), 37071 states have internal predecessors, (153905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37072 states to 37072 states and 153905 transitions. [2021-05-03 16:26:30,758 INFO L78 Accepts]: Start accepts. Automaton has 37072 states and 153905 transitions. Word has length 39 [2021-05-03 16:26:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:30,758 INFO L480 AbstractCegarLoop]: Abstraction has 37072 states and 153905 transitions. [2021-05-03 16:26:30,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 37072 states and 153905 transitions. [2021-05-03 16:26:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:30,859 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:30,859 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:26:31,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:31,060 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1034892989, now seen corresponding path program 45 times [2021-05-03 16:26:31,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:31,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816520044] [2021-05-03 16:26:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:31,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816520044] [2021-05-03 16:26:31,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766592569] [2021-05-03 16:26:31,696 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:31,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:26:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:31,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:26:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:32,241 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 16:26:32,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:32,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:32,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:26:32,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:32,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:32,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:32,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-05-03 16:26:32,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:26:32,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:32,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:32,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:32,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:26:32,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:32,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:26:32,843 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:26:32,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:32,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:26:32,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:26:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:32,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:32,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-05-03 16:26:32,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754970539] [2021-05-03 16:26:32,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:26:32,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:26:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:26:32,948 INFO L87 Difference]: Start difference. First operand 37072 states and 153905 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:34,801 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-05-03 16:26:35,322 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-03 16:26:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:38,081 INFO L93 Difference]: Finished difference Result 68200 states and 279286 transitions. [2021-05-03 16:26:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:26:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:38,381 INFO L225 Difference]: With dead ends: 68200 [2021-05-03 16:26:38,382 INFO L226 Difference]: Without dead ends: 68145 [2021-05-03 16:26:38,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 3405.2ms TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:26:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68145 states. [2021-05-03 16:26:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68145 to 37651. [2021-05-03 16:26:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37651 states, 37650 states have (on average 4.149349269588313) internal successors, (156223), 37650 states have internal predecessors, (156223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37651 states to 37651 states and 156223 transitions. [2021-05-03 16:26:40,071 INFO L78 Accepts]: Start accepts. Automaton has 37651 states and 156223 transitions. Word has length 39 [2021-05-03 16:26:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:40,072 INFO L480 AbstractCegarLoop]: Abstraction has 37651 states and 156223 transitions. [2021-05-03 16:26:40,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 37651 states and 156223 transitions. [2021-05-03 16:26:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:40,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:40,180 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:26:40,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:40,381 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash 899626485, now seen corresponding path program 46 times [2021-05-03 16:26:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:40,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272038215] [2021-05-03 16:26:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:41,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272038215] [2021-05-03 16:26:41,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288365496] [2021-05-03 16:26:41,230 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:41,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:26:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:26:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:41,658 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:26:41,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:26:41,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:41,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:41,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:41,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-05-03 16:26:41,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:26:41,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:41,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:41,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:41,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:26:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:41,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:41,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:26:41,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334176105] [2021-05-03 16:26:41,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:26:41,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:26:41,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:26:41,971 INFO L87 Difference]: Start difference. First operand 37651 states and 156223 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:45,566 INFO L93 Difference]: Finished difference Result 65825 states and 269786 transitions. [2021-05-03 16:26:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:26:45,568 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:45,867 INFO L225 Difference]: With dead ends: 65825 [2021-05-03 16:26:45,868 INFO L226 Difference]: Without dead ends: 65609 [2021-05-03 16:26:45,868 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2672.6ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:26:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65609 states. [2021-05-03 16:26:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65609 to 37607. [2021-05-03 16:26:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37607 states, 37606 states have (on average 4.150002659150136) internal successors, (156065), 37606 states have internal predecessors, (156065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37607 states to 37607 states and 156065 transitions. [2021-05-03 16:26:47,535 INFO L78 Accepts]: Start accepts. Automaton has 37607 states and 156065 transitions. Word has length 39 [2021-05-03 16:26:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:47,535 INFO L480 AbstractCegarLoop]: Abstraction has 37607 states and 156065 transitions. [2021-05-03 16:26:47,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37607 states and 156065 transitions. [2021-05-03 16:26:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:47,648 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:47,648 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:26:47,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 16:26:47,850 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1502735341, now seen corresponding path program 47 times [2021-05-03 16:26:47,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:47,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014850512] [2021-05-03 16:26:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:48,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014850512] [2021-05-03 16:26:48,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551407403] [2021-05-03 16:26:48,764 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:48,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:26:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:26:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:49,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:49,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2021-05-03 16:26:49,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:49,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:49,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:26:49,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:44 [2021-05-03 16:26:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:50,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:26:50,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:50,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:26:50,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 16:26:50,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:50,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:50,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:26:50,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-05-03 16:26:50,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:50,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:50,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:26:50,480 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:26:50,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:50,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:26:50,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:26:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:50,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:50,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:26:50,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965499284] [2021-05-03 16:26:50,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:26:50,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:50,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:26:50,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:26:50,638 INFO L87 Difference]: Start difference. First operand 37607 states and 156065 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:52,862 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-05-03 16:26:53,628 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-05-03 16:26:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:58,487 INFO L93 Difference]: Finished difference Result 70286 states and 287534 transitions. [2021-05-03 16:26:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 16:26:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:58,752 INFO L225 Difference]: With dead ends: 70286 [2021-05-03 16:26:58,753 INFO L226 Difference]: Without dead ends: 70065 [2021-05-03 16:26:58,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 5911.5ms TimeCoverageRelationStatistics Valid=732, Invalid=4238, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:26:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70065 states. [2021-05-03 16:26:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70065 to 37939. [2021-05-03 16:26:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37939 states, 37938 states have (on average 4.146370393800411) internal successors, (157305), 37938 states have internal predecessors, (157305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37939 states to 37939 states and 157305 transitions. [2021-05-03 16:27:00,133 INFO L78 Accepts]: Start accepts. Automaton has 37939 states and 157305 transitions. Word has length 39 [2021-05-03 16:27:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:00,133 INFO L480 AbstractCegarLoop]: Abstraction has 37939 states and 157305 transitions. [2021-05-03 16:27:00,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 37939 states and 157305 transitions. [2021-05-03 16:27:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:00,203 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:00,203 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:00,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:00,404 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:00,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1438695687, now seen corresponding path program 48 times [2021-05-03 16:27:00,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:00,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897104830] [2021-05-03 16:27:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:00,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897104830] [2021-05-03 16:27:00,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677455760] [2021-05-03 16:27:00,919 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:00,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:27:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:00,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:27:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:01,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:01,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-05-03 16:27:01,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:01,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:01,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:27:01,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-05-03 16:27:01,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:01,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:27:01,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:27:01,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:01,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:01,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:01,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:12 [2021-05-03 16:27:01,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:01,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-05-03 16:27:01,795 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:27:01,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:01,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:01,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:14 [2021-05-03 16:27:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:01,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:01,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-03 16:27:01,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919928963] [2021-05-03 16:27:01,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:27:01,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:01,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:27:01,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:27:01,894 INFO L87 Difference]: Start difference. First operand 37939 states and 157305 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:05,389 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-05-03 16:27:06,048 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-05-03 16:27:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:07,308 INFO L93 Difference]: Finished difference Result 81507 states and 329555 transitions. [2021-05-03 16:27:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:27:07,309 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:07,555 INFO L225 Difference]: With dead ends: 81507 [2021-05-03 16:27:07,555 INFO L226 Difference]: Without dead ends: 81409 [2021-05-03 16:27:07,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3578.5ms TimeCoverageRelationStatistics Valid=774, Invalid=3782, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:27:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81409 states. [2021-05-03 16:27:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81409 to 38068. [2021-05-03 16:27:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38068 states, 38067 states have (on average 4.1451388341608215) internal successors, (157793), 38067 states have internal predecessors, (157793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38068 states to 38068 states and 157793 transitions. [2021-05-03 16:27:09,780 INFO L78 Accepts]: Start accepts. Automaton has 38068 states and 157793 transitions. Word has length 39 [2021-05-03 16:27:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:09,780 INFO L480 AbstractCegarLoop]: Abstraction has 38068 states and 157793 transitions. [2021-05-03 16:27:09,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 38068 states and 157793 transitions. [2021-05-03 16:27:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:09,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:09,878 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:10,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-05-03 16:27:10,097 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1311781951, now seen corresponding path program 49 times [2021-05-03 16:27:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:10,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870695455] [2021-05-03 16:27:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870695455] [2021-05-03 16:27:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069221079] [2021-05-03 16:27:10,754 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:27:10,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:11,027 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:27:11,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:27:11,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:11,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:11,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:11,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-05-03 16:27:11,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:27:11,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:11,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:11,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:11,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:27:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:11,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:11,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:27:11,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357817926] [2021-05-03 16:27:11,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:27:11,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:27:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:27:11,260 INFO L87 Difference]: Start difference. First operand 38068 states and 157793 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:13,837 INFO L93 Difference]: Finished difference Result 80010 states and 325453 transitions. [2021-05-03 16:27:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:27:13,838 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:14,115 INFO L225 Difference]: With dead ends: 80010 [2021-05-03 16:27:14,115 INFO L226 Difference]: Without dead ends: 79826 [2021-05-03 16:27:14,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1878.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:27:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79826 states. [2021-05-03 16:27:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79826 to 37815. [2021-05-03 16:27:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37815 states, 37814 states have (on average 4.1485693129528745) internal successors, (156874), 37814 states have internal predecessors, (156874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37815 states to 37815 states and 156874 transitions. [2021-05-03 16:27:15,512 INFO L78 Accepts]: Start accepts. Automaton has 37815 states and 156874 transitions. Word has length 39 [2021-05-03 16:27:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:15,512 INFO L480 AbstractCegarLoop]: Abstraction has 37815 states and 156874 transitions. [2021-05-03 16:27:15,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 37815 states and 156874 transitions. [2021-05-03 16:27:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:15,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:15,588 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:15,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 16:27:15,789 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1564579539, now seen corresponding path program 50 times [2021-05-03 16:27:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:15,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189644122] [2021-05-03 16:27:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:16,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189644122] [2021-05-03 16:27:16,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945785179] [2021-05-03 16:27:16,523 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:16,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:27:16,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:27:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:17,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:27:17,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:27:17,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:17,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:17,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:17,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:27:17,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:27:17,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:17,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:17,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:17,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:27:17,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:27:17,287 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:27:17,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:17,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:27:17,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:27:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:17,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:17,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:27:17,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202320613] [2021-05-03 16:27:17,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:27:17,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:27:17,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:27:17,381 INFO L87 Difference]: Start difference. First operand 37815 states and 156874 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:18,457 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:27:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:21,215 INFO L93 Difference]: Finished difference Result 81479 states and 335542 transitions. [2021-05-03 16:27:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:27:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:21,490 INFO L225 Difference]: With dead ends: 81479 [2021-05-03 16:27:21,490 INFO L226 Difference]: Without dead ends: 81424 [2021-05-03 16:27:21,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2713.7ms TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:27:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81424 states. [2021-05-03 16:27:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81424 to 38089. [2021-05-03 16:27:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38089 states, 38088 states have (on average 4.147500525099769) internal successors, (157970), 38088 states have internal predecessors, (157970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38089 states to 38089 states and 157970 transitions. [2021-05-03 16:27:22,920 INFO L78 Accepts]: Start accepts. Automaton has 38089 states and 157970 transitions. Word has length 39 [2021-05-03 16:27:22,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:22,920 INFO L480 AbstractCegarLoop]: Abstraction has 38089 states and 157970 transitions. [2021-05-03 16:27:22,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 38089 states and 157970 transitions. [2021-05-03 16:27:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:23,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:23,001 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:23,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-03 16:27:23,205 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash 369939935, now seen corresponding path program 51 times [2021-05-03 16:27:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:23,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138587699] [2021-05-03 16:27:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:23,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138587699] [2021-05-03 16:27:23,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33379442] [2021-05-03 16:27:23,871 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:27:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:23,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:27:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:24,425 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-03 16:27:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:24,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:24,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:27:24,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:24,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:24,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:27:24,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:55 [2021-05-03 16:27:25,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:25,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-05-03 16:27:25,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:25,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:25,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:25,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:108 [2021-05-03 16:27:25,535 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 16:27:25,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:25,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:27:25,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-05-03 16:27:25,589 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:27:25,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:27:25,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:25,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:27:25,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:25,644 INFO L628 ElimStorePlain]: treesize reduction 115, result has 11.5 percent of original size [2021-05-03 16:27:25,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:27:25,645 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:207, output treesize:13 [2021-05-03 16:27:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:25,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:25,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-03 16:27:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167416966] [2021-05-03 16:27:25,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:27:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:27:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:27:25,778 INFO L87 Difference]: Start difference. First operand 38089 states and 157970 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:29,610 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 16:27:31,274 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:27:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:31,694 INFO L93 Difference]: Finished difference Result 63464 states and 258675 transitions. [2021-05-03 16:27:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:27:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:31,902 INFO L225 Difference]: With dead ends: 63464 [2021-05-03 16:27:31,902 INFO L226 Difference]: Without dead ends: 63308 [2021-05-03 16:27:31,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 4379.7ms TimeCoverageRelationStatistics Valid=739, Invalid=4231, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:27:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63308 states. [2021-05-03 16:27:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63308 to 38367. [2021-05-03 16:27:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38367 states, 38366 states have (on average 4.14325183756451) internal successors, (158960), 38366 states have internal predecessors, (158960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38367 states to 38367 states and 158960 transitions. [2021-05-03 16:27:32,972 INFO L78 Accepts]: Start accepts. Automaton has 38367 states and 158960 transitions. Word has length 39 [2021-05-03 16:27:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:32,972 INFO L480 AbstractCegarLoop]: Abstraction has 38367 states and 158960 transitions. [2021-05-03 16:27:32,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 38367 states and 158960 transitions. [2021-05-03 16:27:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:33,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:33,052 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:33,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:33,252 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1311896975, now seen corresponding path program 52 times [2021-05-03 16:27:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:33,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043846519] [2021-05-03 16:27:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:33,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043846519] [2021-05-03 16:27:33,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649050537] [2021-05-03 16:27:33,791 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:33,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:27:33,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:33,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:27:33,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:34,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:27:34,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:27:34,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:34,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:34,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:34,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-05-03 16:27:34,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:27:34,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:34,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:34,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:34,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:27:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:34,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:34,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:27:34,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608427452] [2021-05-03 16:27:34,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:27:34,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:27:34,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:27:34,289 INFO L87 Difference]: Start difference. First operand 38367 states and 158960 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:35,476 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:27:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:38,010 INFO L93 Difference]: Finished difference Result 80709 states and 328280 transitions. [2021-05-03 16:27:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:27:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:38,290 INFO L225 Difference]: With dead ends: 80709 [2021-05-03 16:27:38,290 INFO L226 Difference]: Without dead ends: 80493 [2021-05-03 16:27:38,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2261.1ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:27:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80493 states. [2021-05-03 16:27:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80493 to 38109. [2021-05-03 16:27:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38109 states, 38108 states have (on average 4.145533746195024) internal successors, (157978), 38108 states have internal predecessors, (157978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38109 states to 38109 states and 157978 transitions. [2021-05-03 16:27:39,703 INFO L78 Accepts]: Start accepts. Automaton has 38109 states and 157978 transitions. Word has length 39 [2021-05-03 16:27:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:39,703 INFO L480 AbstractCegarLoop]: Abstraction has 38109 states and 157978 transitions. [2021-05-03 16:27:39,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38109 states and 157978 transitions. [2021-05-03 16:27:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:39,781 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:39,781 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:39,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:39,982 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:39,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1573156905, now seen corresponding path program 53 times [2021-05-03 16:27:39,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:39,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975926015] [2021-05-03 16:27:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:41,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975926015] [2021-05-03 16:27:41,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886326248] [2021-05-03 16:27:41,207 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:41,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:27:41,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:27:41,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 16:27:41,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:41,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:41,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:41,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-05-03 16:27:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:41,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:41,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-05-03 16:27:41,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:27:41,830 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-05-03 16:27:41,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:41,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:34 [2021-05-03 16:27:42,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:27:42,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:27:42,084 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:27:42,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:42,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:42,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-05-03 16:27:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:42,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:42,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:27:42,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55327816] [2021-05-03 16:27:42,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:27:42,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:27:42,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:27:42,131 INFO L87 Difference]: Start difference. First operand 38109 states and 157978 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:44,240 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-05-03 16:27:45,207 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-05-03 16:27:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:47,829 INFO L93 Difference]: Finished difference Result 67305 states and 274805 transitions. [2021-05-03 16:27:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:27:47,831 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:48,068 INFO L225 Difference]: With dead ends: 67305 [2021-05-03 16:27:48,068 INFO L226 Difference]: Without dead ends: 67250 [2021-05-03 16:27:48,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 3703.0ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:27:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67250 states. [2021-05-03 16:27:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67250 to 38670. [2021-05-03 16:27:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38670 states, 38669 states have (on average 4.149861646279966) internal successors, (160471), 38669 states have internal predecessors, (160471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38670 states to 38670 states and 160471 transitions. [2021-05-03 16:27:49,349 INFO L78 Accepts]: Start accepts. Automaton has 38670 states and 160471 transitions. Word has length 39 [2021-05-03 16:27:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:49,350 INFO L480 AbstractCegarLoop]: Abstraction has 38670 states and 160471 transitions. [2021-05-03 16:27:49,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 38670 states and 160471 transitions. [2021-05-03 16:27:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:49,436 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:49,436 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:49,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 16:27:49,638 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1254976421, now seen corresponding path program 54 times [2021-05-03 16:27:49,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:49,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548386745] [2021-05-03 16:27:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:50,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548386745] [2021-05-03 16:27:50,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018127948] [2021-05-03 16:27:50,279 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:50,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:27:50,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:50,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 16:27:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:50,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:27:50,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:50,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:50,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:27:50,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:41 [2021-05-03 16:27:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:50,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:27:50,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:27:50,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:50,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:50,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:50,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-05-03 16:27:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:51,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:51,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:27:51,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024002937] [2021-05-03 16:27:51,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:27:51,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:27:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:27:51,076 INFO L87 Difference]: Start difference. First operand 38670 states and 160471 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:53,193 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-05-03 16:27:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:54,904 INFO L93 Difference]: Finished difference Result 93986 states and 383473 transitions. [2021-05-03 16:27:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:27:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:55,206 INFO L225 Difference]: With dead ends: 93986 [2021-05-03 16:27:55,207 INFO L226 Difference]: Without dead ends: 93931 [2021-05-03 16:27:55,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2796.6ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:27:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93931 states. [2021-05-03 16:27:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93931 to 38539. [2021-05-03 16:27:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38539 states, 38538 states have (on average 4.146868026363589) internal successors, (159812), 38538 states have internal predecessors, (159812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159812 transitions. [2021-05-03 16:27:56,760 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159812 transitions. Word has length 39 [2021-05-03 16:27:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:56,760 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159812 transitions. [2021-05-03 16:27:56,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159812 transitions. [2021-05-03 16:27:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:56,838 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:56,838 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:27:57,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:57,039 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash 935568875, now seen corresponding path program 55 times [2021-05-03 16:27:57,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:57,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807732270] [2021-05-03 16:27:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:57,511 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:27:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:57,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807732270] [2021-05-03 16:27:57,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135418588] [2021-05-03 16:27:57,883 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:57,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:27:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:58,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:27:58,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:58,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:27:58,381 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:27:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:27:58,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:58,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:27:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:58,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:58,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:27:58,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504940894] [2021-05-03 16:27:58,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:27:58,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:27:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:27:58,455 INFO L87 Difference]: Start difference. First operand 38539 states and 159812 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:01,835 INFO L93 Difference]: Finished difference Result 88125 states and 363578 transitions. [2021-05-03 16:28:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:28:01,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:02,144 INFO L225 Difference]: With dead ends: 88125 [2021-05-03 16:28:02,144 INFO L226 Difference]: Without dead ends: 88070 [2021-05-03 16:28:02,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1982.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:28:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88070 states. [2021-05-03 16:28:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88070 to 39031. [2021-05-03 16:28:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39031 states, 39030 states have (on average 4.149321035101204) internal successors, (161948), 39030 states have internal predecessors, (161948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39031 states to 39031 states and 161948 transitions. [2021-05-03 16:28:03,697 INFO L78 Accepts]: Start accepts. Automaton has 39031 states and 161948 transitions. Word has length 39 [2021-05-03 16:28:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:03,698 INFO L480 AbstractCegarLoop]: Abstraction has 39031 states and 161948 transitions. [2021-05-03 16:28:03,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 39031 states and 161948 transitions. [2021-05-03 16:28:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:03,781 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:03,781 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:28:03,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-05-03 16:28:03,981 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1940405397, now seen corresponding path program 56 times [2021-05-03 16:28:03,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:03,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592767871] [2021-05-03 16:28:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592767871] [2021-05-03 16:28:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233084979] [2021-05-03 16:28:04,554 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:04,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:28:04,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:28:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:28:04,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:04,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:04,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:04,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:28:05,122 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:28:05,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:28:05,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:05,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:05,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:05,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:28:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:05,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:05,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:28:05,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888460607] [2021-05-03 16:28:05,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:28:05,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:05,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:28:05,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:28:05,195 INFO L87 Difference]: Start difference. First operand 39031 states and 161948 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:08,416 INFO L93 Difference]: Finished difference Result 85381 states and 351989 transitions. [2021-05-03 16:28:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:28:08,417 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:08,718 INFO L225 Difference]: With dead ends: 85381 [2021-05-03 16:28:08,719 INFO L226 Difference]: Without dead ends: 85326 [2021-05-03 16:28:08,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1678.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:28:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85326 states. [2021-05-03 16:28:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85326 to 38439. [2021-05-03 16:28:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38439 states, 38438 states have (on average 4.146209480201883) internal successors, (159372), 38438 states have internal predecessors, (159372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38439 states to 38439 states and 159372 transitions. [2021-05-03 16:28:10,237 INFO L78 Accepts]: Start accepts. Automaton has 38439 states and 159372 transitions. Word has length 39 [2021-05-03 16:28:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:10,237 INFO L480 AbstractCegarLoop]: Abstraction has 38439 states and 159372 transitions. [2021-05-03 16:28:10,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 38439 states and 159372 transitions. [2021-05-03 16:28:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:10,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:10,318 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:28:10,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 16:28:10,519 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash -463391085, now seen corresponding path program 57 times [2021-05-03 16:28:10,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:10,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507596641] [2021-05-03 16:28:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507596641] [2021-05-03 16:28:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258005998] [2021-05-03 16:28:11,169 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:11,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:28:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-03 16:28:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:11,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:11,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-05-03 16:28:11,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:11,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:11,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:11,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:112 [2021-05-03 16:28:12,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:12,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-05-03 16:28:12,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:12,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:12,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:12,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:54 [2021-05-03 16:28:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:12,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-05-03 16:28:12,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:12,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:28:12,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:12,224 INFO L628 ElimStorePlain]: treesize reduction 25, result has 57.6 percent of original size [2021-05-03 16:28:12,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:12,226 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:97, output treesize:34 [2021-05-03 16:28:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:12,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:12,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-05-03 16:28:12,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799332386] [2021-05-03 16:28:12,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 16:28:12,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:12,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 16:28:12,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:28:12,874 INFO L87 Difference]: Start difference. First operand 38439 states and 159372 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:14,729 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:28:15,665 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-05-03 16:28:16,410 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 16:28:16,860 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-05-03 16:28:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:18,366 INFO L93 Difference]: Finished difference Result 63331 states and 257800 transitions. [2021-05-03 16:28:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:28:18,368 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:18,600 INFO L225 Difference]: With dead ends: 63331 [2021-05-03 16:28:18,601 INFO L226 Difference]: Without dead ends: 63183 [2021-05-03 16:28:18,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 4348.0ms TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 16:28:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63183 states. [2021-05-03 16:28:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63183 to 38679. [2021-05-03 16:28:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38679 states, 38678 states have (on average 4.143492424634159) internal successors, (160262), 38678 states have internal predecessors, (160262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38679 states to 38679 states and 160262 transitions. [2021-05-03 16:28:19,944 INFO L78 Accepts]: Start accepts. Automaton has 38679 states and 160262 transitions. Word has length 39 [2021-05-03 16:28:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:19,944 INFO L480 AbstractCegarLoop]: Abstraction has 38679 states and 160262 transitions. [2021-05-03 16:28:19,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 38679 states and 160262 transitions. [2021-05-03 16:28:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:20,030 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:20,030 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:28:20,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 16:28:20,232 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:20,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2145227995, now seen corresponding path program 58 times [2021-05-03 16:28:20,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:20,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973488868] [2021-05-03 16:28:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:20,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973488868] [2021-05-03 16:28:20,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460583377] [2021-05-03 16:28:20,924 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:20,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:28:20,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:20,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:28:20,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:21,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:28:21,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-05-03 16:28:21,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:21,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:28:21,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:28:21,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:21,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:28:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:21,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:21,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:28:21,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563331267] [2021-05-03 16:28:21,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:28:21,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:21,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:28:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:28:21,549 INFO L87 Difference]: Start difference. First operand 38679 states and 160262 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:25,964 INFO L93 Difference]: Finished difference Result 81718 states and 332147 transitions. [2021-05-03 16:28:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:28:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:26,251 INFO L225 Difference]: With dead ends: 81718 [2021-05-03 16:28:26,251 INFO L226 Difference]: Without dead ends: 81494 [2021-05-03 16:28:26,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2489.6ms TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:28:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81494 states. [2021-05-03 16:28:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81494 to 38631. [2021-05-03 16:28:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38631 states, 38630 states have (on average 4.143981361636034) internal successors, (160082), 38630 states have internal predecessors, (160082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38631 states to 38631 states and 160082 transitions. [2021-05-03 16:28:27,717 INFO L78 Accepts]: Start accepts. Automaton has 38631 states and 160082 transitions. Word has length 39 [2021-05-03 16:28:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:27,717 INFO L480 AbstractCegarLoop]: Abstraction has 38631 states and 160082 transitions. [2021-05-03 16:28:27,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38631 states and 160082 transitions. [2021-05-03 16:28:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:27,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:27,800 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:28:28,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:28,001 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:28,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1553694967, now seen corresponding path program 59 times [2021-05-03 16:28:28,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:28,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882528211] [2021-05-03 16:28:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:28,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882528211] [2021-05-03 16:28:28,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770226853] [2021-05-03 16:28:28,748 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:28,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:28:28,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:28:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:29,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:29,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-05-03 16:28:29,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:29,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:29,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:28:29,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:98 [2021-05-03 16:28:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:29,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:29,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:29,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-05-03 16:28:29,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:28:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:29,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:28:29,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:28:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:28:29,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:29,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:28:29,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:29,901 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-03 16:28:29,901 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-05-03 16:28:29,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-05-03 16:28:29,915 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-05-03 16:28:30,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:30,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:30,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:30,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:30,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:28:30,523 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:30,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:30,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:30,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:28:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:30,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:30,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:28:30,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062423772] [2021-05-03 16:28:30,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:28:30,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:30,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:28:30,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:28:30,647 INFO L87 Difference]: Start difference. First operand 38631 states and 160082 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:31,723 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-03 16:28:33,331 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2021-05-03 16:28:33,773 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 16:28:34,715 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-05-03 16:28:34,966 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-05-03 16:28:35,725 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:28:36,152 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-05-03 16:28:36,425 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:28:36,724 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-05-03 16:28:38,302 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 16:28:38,535 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-05-03 16:28:38,761 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-05-03 16:28:39,312 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 16:28:41,137 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:28:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:43,509 INFO L93 Difference]: Finished difference Result 93198 states and 377973 transitions. [2021-05-03 16:28:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 16:28:43,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:44,085 INFO L225 Difference]: With dead ends: 93198 [2021-05-03 16:28:44,085 INFO L226 Difference]: Without dead ends: 92715 [2021-05-03 16:28:44,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2767 ImplicationChecksByTransitivity, 8759.1ms TimeCoverageRelationStatistics Valid=1346, Invalid=7774, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 16:28:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92715 states. [2021-05-03 16:28:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92715 to 38799. [2021-05-03 16:28:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38799 states, 38798 states have (on average 4.143048610753132) internal successors, (160742), 38798 states have internal predecessors, (160742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38799 states to 38799 states and 160742 transitions. [2021-05-03 16:28:45,768 INFO L78 Accepts]: Start accepts. Automaton has 38799 states and 160742 transitions. Word has length 39 [2021-05-03 16:28:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:45,768 INFO L480 AbstractCegarLoop]: Abstraction has 38799 states and 160742 transitions. [2021-05-03 16:28:45,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 38799 states and 160742 transitions. [2021-05-03 16:28:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:45,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:45,863 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:28:46,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:46,064 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1757615713, now seen corresponding path program 60 times [2021-05-03 16:28:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:46,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090018541] [2021-05-03 16:28:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:46,209 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:28:46,337 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:28:47,008 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:28:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:47,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090018541] [2021-05-03 16:28:47,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506022607] [2021-05-03 16:28:47,275 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:47,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:28:47,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 16:28:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 16:28:48,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:48,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:48,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:48,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-05-03 16:28:48,177 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:28:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-05-03 16:28:48,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:48,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:48,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:48,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-05-03 16:28:48,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:28:48,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:28:48,299 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:28:48,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:48,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:48,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-05-03 16:28:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:48,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:48,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:28:48,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732576869] [2021-05-03 16:28:48,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:28:48,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:28:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:28:48,397 INFO L87 Difference]: Start difference. First operand 38799 states and 160742 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:49,062 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:28:49,759 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:28:51,037 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:28:51,483 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-05-03 16:28:52,543 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-05-03 16:28:53,327 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 16:28:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:55,482 INFO L93 Difference]: Finished difference Result 67047 states and 273559 transitions. [2021-05-03 16:28:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:28:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:55,756 INFO L225 Difference]: With dead ends: 67047 [2021-05-03 16:28:55,756 INFO L226 Difference]: Without dead ends: 66957 [2021-05-03 16:28:55,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4372.8ms TimeCoverageRelationStatistics Valid=382, Invalid=1780, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:28:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66957 states. [2021-05-03 16:28:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66957 to 38963. [2021-05-03 16:28:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38963 states, 38962 states have (on average 4.142395154252862) internal successors, (161396), 38962 states have internal predecessors, (161396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38963 states to 38963 states and 161396 transitions. [2021-05-03 16:28:57,170 INFO L78 Accepts]: Start accepts. Automaton has 38963 states and 161396 transitions. Word has length 39 [2021-05-03 16:28:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:57,170 INFO L480 AbstractCegarLoop]: Abstraction has 38963 states and 161396 transitions. [2021-05-03 16:28:57,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 38963 states and 161396 transitions. [2021-05-03 16:28:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:57,275 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:57,276 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:28:57,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:57,476 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 159853789, now seen corresponding path program 61 times [2021-05-03 16:28:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:57,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918309552] [2021-05-03 16:28:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:57,620 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:28:57,742 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:28:58,445 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:28:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:58,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918309552] [2021-05-03 16:28:58,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331712681] [2021-05-03 16:28:58,801 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:28:58,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:59,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:28:59,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:59,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:59,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:59,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:28:59,786 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:28:59,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:28:59,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:59,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:59,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:59,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:28:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:59,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:59,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:28:59,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141512219] [2021-05-03 16:28:59,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:28:59,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:59,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:28:59,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:28:59,970 INFO L87 Difference]: Start difference. First operand 38963 states and 161396 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:01,156 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 16:29:01,627 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-05-03 16:29:05,216 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-03 16:29:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:29:06,942 INFO L93 Difference]: Finished difference Result 99416 states and 403744 transitions. [2021-05-03 16:29:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:29:06,945 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:29:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:29:07,354 INFO L225 Difference]: With dead ends: 99416 [2021-05-03 16:29:07,354 INFO L226 Difference]: Without dead ends: 99280 [2021-05-03 16:29:07,354 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 4701.4ms TimeCoverageRelationStatistics Valid=446, Invalid=2004, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:29:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99280 states. [2021-05-03 16:29:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99280 to 38539. [2021-05-03 16:29:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38539 states, 38538 states have (on average 4.1451554310031655) internal successors, (159746), 38538 states have internal predecessors, (159746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159746 transitions. [2021-05-03 16:29:09,539 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159746 transitions. Word has length 39 [2021-05-03 16:29:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:29:09,539 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159746 transitions. [2021-05-03 16:29:09,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159746 transitions. [2021-05-03 16:29:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:29:09,624 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:29:09,624 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:29:09,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:29:09,825 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:29:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:29:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1095343571, now seen corresponding path program 62 times [2021-05-03 16:29:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:29:09,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507589393] [2021-05-03 16:29:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:29:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:29:10,069 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:29:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:10,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507589393] [2021-05-03 16:29:10,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358146084] [2021-05-03 16:29:10,907 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:29:10,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:29:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:29:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:29:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:29:11,705 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:29:11,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-05-03 16:29:11,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:11,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:11,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:11,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:29:11,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:29:11,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:11,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:11,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:11,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:29:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:12,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:29:12,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:29:12,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267537831] [2021-05-03 16:29:12,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:29:12,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:29:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:29:12,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:29:12,124 INFO L87 Difference]: Start difference. First operand 38539 states and 159746 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:13,149 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 16:29:13,854 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 16:29:14,232 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:29:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:29:17,580 INFO L93 Difference]: Finished difference Result 66725 states and 273315 transitions. [2021-05-03 16:29:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:29:17,583 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:29:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:29:17,854 INFO L225 Difference]: With dead ends: 66725 [2021-05-03 16:29:17,854 INFO L226 Difference]: Without dead ends: 66533 [2021-05-03 16:29:17,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3720.2ms TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:29:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66533 states. [2021-05-03 16:29:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66533 to 38563. [2021-05-03 16:29:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38563 states, 38562 states have (on average 4.144753902805871) internal successors, (159830), 38562 states have internal predecessors, (159830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38563 states to 38563 states and 159830 transitions. [2021-05-03 16:29:19,572 INFO L78 Accepts]: Start accepts. Automaton has 38563 states and 159830 transitions. Word has length 39 [2021-05-03 16:29:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:29:19,572 INFO L480 AbstractCegarLoop]: Abstraction has 38563 states and 159830 transitions. [2021-05-03 16:29:19,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 38563 states and 159830 transitions. [2021-05-03 16:29:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:29:19,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:29:19,721 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:29:19,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-05-03 16:29:19,945 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:29:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:29:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1049841687, now seen corresponding path program 63 times [2021-05-03 16:29:19,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:29:19,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675062260] [2021-05-03 16:29:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:29:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:29:20,876 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:29:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:21,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675062260] [2021-05-03 16:29:21,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716949618] [2021-05-03 16:29:21,247 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:29:21,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:29:21,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:29:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 16:29:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:29:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:29:22,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-05-03 16:29:22,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:22,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:22,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:29:22,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:63 [2021-05-03 16:29:23,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-05-03 16:29:23,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:23,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:23,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:23,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:112 [2021-05-03 16:29:23,559 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 16:29:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:29:23,950 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-05-03 16:29:23,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-05-03 16:29:23,954 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:23,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:29:23,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-05-03 16:29:23,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:23,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:23,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:29:23,991 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:29:24,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:29:24,035 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-05-03 16:29:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-05-03 16:29:24,038 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:24,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:29:24,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:24,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:24,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:29:24,075 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:29:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:29:24,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:29:24,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:29:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-05-03 16:29:24,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:24,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:24,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:29:24,147 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:29:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:29:24,200 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-05-03 16:29:24,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 1 [2021-05-03 16:29:24,203 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:24,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:29:24,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:24,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-05-03 16:29:24,267 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-05-03 16:29:24,896 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 16:29:24,897 INFO L628 ElimStorePlain]: treesize reduction 117, result has 51.5 percent of original size [2021-05-03 16:29:24,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:29:24,909 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:363, output treesize:128 [2021-05-03 16:29:25,218 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 16:29:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:25,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:29:25,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:29:25,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471862611] [2021-05-03 16:29:25,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:29:25,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:29:25,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:29:25,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:29:25,624 INFO L87 Difference]: Start difference. First operand 38563 states and 159830 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:26,833 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-05-03 16:29:27,301 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 14 [2021-05-03 16:29:27,892 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-05-03 16:29:28,193 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-05-03 16:29:28,834 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-05-03 16:29:29,495 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-05-03 16:29:29,901 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-05-03 16:29:30,533 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-05-03 16:29:31,056 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-05-03 16:29:31,474 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-05-03 16:29:31,916 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-05-03 16:29:32,517 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 16:29:33,054 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-05-03 16:29:33,454 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-05-03 16:29:34,010 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-03 16:29:34,396 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-03 16:29:35,282 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-05-03 16:29:35,732 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-05-03 16:29:36,390 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 16:29:36,877 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 16:29:37,369 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 16:29:37,871 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-05-03 16:29:38,203 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-03 16:29:38,752 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-05-03 16:29:39,363 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-03 16:29:40,253 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:29:40,802 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-05-03 16:29:41,380 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-05-03 16:29:41,687 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-05-03 16:29:42,452 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-03 16:29:42,942 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-05-03 16:29:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:29:43,894 INFO L93 Difference]: Finished difference Result 69019 states and 280817 transitions. [2021-05-03 16:29:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:29:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:29:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:29:44,166 INFO L225 Difference]: With dead ends: 69019 [2021-05-03 16:29:44,166 INFO L226 Difference]: Without dead ends: 68871 [2021-05-03 16:29:44,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 14615.6ms TimeCoverageRelationStatistics Valid=940, Invalid=4912, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 16:29:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68871 states. [2021-05-03 16:29:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68871 to 38767. [2021-05-03 16:29:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38767 states, 38766 states have (on average 4.142805551256256) internal successors, (160600), 38766 states have internal predecessors, (160600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38767 states to 38767 states and 160600 transitions. [2021-05-03 16:29:45,522 INFO L78 Accepts]: Start accepts. Automaton has 38767 states and 160600 transitions. Word has length 39 [2021-05-03 16:29:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:29:45,523 INFO L480 AbstractCegarLoop]: Abstraction has 38767 states and 160600 transitions. [2021-05-03 16:29:45,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 38767 states and 160600 transitions. [2021-05-03 16:29:45,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:29:45,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:29:45,623 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:29:45,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-03 16:29:45,826 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:29:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:29:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1563288699, now seen corresponding path program 64 times [2021-05-03 16:29:45,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:29:45,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339807145] [2021-05-03 16:29:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:29:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:29:46,088 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:29:46,634 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:29:46,800 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:29:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:47,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339807145] [2021-05-03 16:29:47,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699582717] [2021-05-03 16:29:47,079 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:29:47,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:29:47,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:29:47,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:29:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:29:48,068 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:29:48,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-05-03 16:29:48,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:48,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:48,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:48,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:29:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:29:48,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:48,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:48,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:48,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:29:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:48,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:29:48,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:29:48,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299132231] [2021-05-03 16:29:48,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:29:48,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:29:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:29:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:29:48,442 INFO L87 Difference]: Start difference. First operand 38767 states and 160600 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:49,766 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 16:29:51,282 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:29:51,635 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:29:52,121 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:29:52,359 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:29:54,063 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 16:29:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:29:56,372 INFO L93 Difference]: Finished difference Result 81937 states and 333038 transitions. [2021-05-03 16:29:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:29:56,374 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:29:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:29:56,693 INFO L225 Difference]: With dead ends: 81937 [2021-05-03 16:29:56,693 INFO L226 Difference]: Without dead ends: 81713 [2021-05-03 16:29:56,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 5722.6ms TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:29:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81713 states. [2021-05-03 16:29:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81713 to 38719. [2021-05-03 16:29:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38719 states, 38718 states have (on average 4.143292525440364) internal successors, (160420), 38718 states have internal predecessors, (160420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38719 states to 38719 states and 160420 transitions. [2021-05-03 16:29:58,865 INFO L78 Accepts]: Start accepts. Automaton has 38719 states and 160420 transitions. Word has length 39 [2021-05-03 16:29:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:29:58,865 INFO L480 AbstractCegarLoop]: Abstraction has 38719 states and 160420 transitions. [2021-05-03 16:29:58,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 38719 states and 160420 transitions. [2021-05-03 16:29:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:29:58,979 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:29:58,980 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:29:59,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-03 16:29:59,201 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:29:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:29:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1373542401, now seen corresponding path program 65 times [2021-05-03 16:29:59,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:29:59,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022284945] [2021-05-03 16:29:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:29:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:00,639 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:30:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022284945] [2021-05-03 16:30:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175947745] [2021-05-03 16:30:00,839 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:00,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:30:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:30:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:30:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:01,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:01,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-05-03 16:30:01,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:02,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:02,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:30:02,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:95 [2021-05-03 16:30:02,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:02,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-05-03 16:30:02,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:30:02,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:02,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-05-03 16:30:02,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 16:30:02,554 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-03 16:30:02,554 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-05-03 16:30:02,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-05-03 16:30:02,566 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-05-03 16:30:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:02,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:02,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:30:02,932 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:30:02,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:02,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:30:02,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:30:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:03,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:03,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:30:03,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79744019] [2021-05-03 16:30:03,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:30:03,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:03,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:30:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:30:03,118 INFO L87 Difference]: Start difference. First operand 38719 states and 160420 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:04,696 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-03 16:30:05,484 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-05-03 16:30:06,694 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-05-03 16:30:06,941 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2021-05-03 16:30:07,599 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 16:30:08,060 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:30:08,312 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 16:30:09,118 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-05-03 16:30:09,464 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-05-03 16:30:10,484 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-03 16:30:11,021 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-05-03 16:30:11,372 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:30:11,746 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 16:30:13,215 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-03 16:30:14,214 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-05-03 16:30:14,937 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:30:15,156 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-03 16:30:16,219 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:30:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:30:18,855 INFO L93 Difference]: Finished difference Result 93148 states and 377918 transitions. [2021-05-03 16:30:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-03 16:30:18,858 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:30:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:30:19,176 INFO L225 Difference]: With dead ends: 93148 [2021-05-03 16:30:19,177 INFO L226 Difference]: Without dead ends: 92681 [2021-05-03 16:30:19,177 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 11513.0ms TimeCoverageRelationStatistics Valid=1205, Invalid=6805, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 16:30:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92681 states. [2021-05-03 16:30:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92681 to 38859. [2021-05-03 16:30:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38859 states, 38858 states have (on average 4.142261567759535) internal successors, (160960), 38858 states have internal predecessors, (160960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38859 states to 38859 states and 160960 transitions. [2021-05-03 16:30:20,803 INFO L78 Accepts]: Start accepts. Automaton has 38859 states and 160960 transitions. Word has length 39 [2021-05-03 16:30:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:30:20,804 INFO L480 AbstractCegarLoop]: Abstraction has 38859 states and 160960 transitions. [2021-05-03 16:30:20,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 38859 states and 160960 transitions. [2021-05-03 16:30:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:30:20,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:30:20,890 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:30:21,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-03 16:30:21,103 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:30:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:30:21,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1169621655, now seen corresponding path program 66 times [2021-05-03 16:30:21,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:30:21,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35276382] [2021-05-03 16:30:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:30:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:21,799 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:30:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:22,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35276382] [2021-05-03 16:30:22,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840511307] [2021-05-03 16:30:22,005 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:22,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:30:22,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:30:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:30:22,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:23,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:30:23,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:23,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:23,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:30:23,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-05-03 16:30:23,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:30:23,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-05-03 16:30:23,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:23,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:23,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:30:23,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:16 [2021-05-03 16:30:23,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:30:23,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:30:23,385 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:30:23,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:23,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:23,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-05-03 16:30:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:23,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:23,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:30:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759606179] [2021-05-03 16:30:23,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:30:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:30:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:30:23,517 INFO L87 Difference]: Start difference. First operand 38859 states and 160960 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:24,284 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:30:24,782 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 16:30:25,266 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:30:25,561 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-03 16:30:28,052 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-05-03 16:30:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:30:29,787 INFO L93 Difference]: Finished difference Result 66745 states and 272318 transitions. [2021-05-03 16:30:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:30:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:30:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:30:30,039 INFO L225 Difference]: With dead ends: 66745 [2021-05-03 16:30:30,039 INFO L226 Difference]: Without dead ends: 66655 [2021-05-03 16:30:30,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3995.5ms TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:30:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66655 states. [2021-05-03 16:30:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66655 to 39027. [2021-05-03 16:30:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39027 states, 39026 states have (on average 4.141341669656127) internal successors, (161620), 39026 states have internal predecessors, (161620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39027 states to 39027 states and 161620 transitions. [2021-05-03 16:30:31,289 INFO L78 Accepts]: Start accepts. Automaton has 39027 states and 161620 transitions. Word has length 39 [2021-05-03 16:30:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:30:31,290 INFO L480 AbstractCegarLoop]: Abstraction has 39027 states and 161620 transitions. [2021-05-03 16:30:31,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 39027 states and 161620 transitions. [2021-05-03 16:30:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:30:31,365 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:30:31,365 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:30:31,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-03 16:30:31,566 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:30:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:30:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1527583717, now seen corresponding path program 67 times [2021-05-03 16:30:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:30:31,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185997866] [2021-05-03 16:30:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:30:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:32,248 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:30:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185997866] [2021-05-03 16:30:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498909361] [2021-05-03 16:30:32,470 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:32,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:30:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:33,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:30:33,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:33,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:33,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:33,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:30:33,535 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:30:33,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:30:33,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:33,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:33,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:33,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:30:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:33,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:33,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:30:33,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520265251] [2021-05-03 16:30:33,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:30:33,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:30:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:30:33,673 INFO L87 Difference]: Start difference. First operand 39027 states and 161620 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:34,706 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 16:30:37,925 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-03 16:30:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:30:39,531 INFO L93 Difference]: Finished difference Result 99611 states and 404417 transitions. [2021-05-03 16:30:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:30:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:30:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:30:39,967 INFO L225 Difference]: With dead ends: 99611 [2021-05-03 16:30:39,967 INFO L226 Difference]: Without dead ends: 99475 [2021-05-03 16:30:39,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3769.4ms TimeCoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:30:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99475 states. [2021-05-03 16:30:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99475 to 38559. [2021-05-03 16:30:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38559 states, 38558 states have (on average 4.144820789460034) internal successors, (159816), 38558 states have internal predecessors, (159816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38559 states to 38559 states and 159816 transitions. [2021-05-03 16:30:41,649 INFO L78 Accepts]: Start accepts. Automaton has 38559 states and 159816 transitions. Word has length 39 [2021-05-03 16:30:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:30:41,649 INFO L480 AbstractCegarLoop]: Abstraction has 38559 states and 159816 transitions. [2021-05-03 16:30:41,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 38559 states and 159816 transitions. [2021-05-03 16:30:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:30:41,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:30:41,731 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:30:41,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-03 16:30:41,932 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:30:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:30:41,932 INFO L82 PathProgramCache]: Analyzing trace with hash -912086607, now seen corresponding path program 68 times [2021-05-03 16:30:41,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:30:41,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651131776] [2021-05-03 16:30:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:30:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:42,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651131776] [2021-05-03 16:30:42,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998293074] [2021-05-03 16:30:42,704 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:42,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:30:42,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:30:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:30:42,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:43,287 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:30:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:30:43,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:43,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:43,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:43,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:30:43,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:30:43,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:43,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:43,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:43,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:30:43,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:43,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:30:43,643 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:30:43,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:43,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:30:43,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:30:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:43,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:43,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:30:43,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238456884] [2021-05-03 16:30:43,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:30:43,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:43,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:30:43,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:30:43,781 INFO L87 Difference]: Start difference. First operand 38559 states and 159816 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:45,397 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-05-03 16:30:45,937 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-03 16:30:46,490 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 16:30:46,920 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 16:30:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:30:51,880 INFO L93 Difference]: Finished difference Result 85936 states and 353751 transitions. [2021-05-03 16:30:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:30:51,885 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:30:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:30:52,249 INFO L225 Difference]: With dead ends: 85936 [2021-05-03 16:30:52,249 INFO L226 Difference]: Without dead ends: 85881 [2021-05-03 16:30:52,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 4540.1ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:30:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85881 states. [2021-05-03 16:30:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85881 to 39379. [2021-05-03 16:30:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39379 states, 39378 states have (on average 4.140992432322617) internal successors, (163064), 39378 states have internal predecessors, (163064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39379 states to 39379 states and 163064 transitions. [2021-05-03 16:30:54,073 INFO L78 Accepts]: Start accepts. Automaton has 39379 states and 163064 transitions. Word has length 39 [2021-05-03 16:30:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:30:54,073 INFO L480 AbstractCegarLoop]: Abstraction has 39379 states and 163064 transitions. [2021-05-03 16:30:54,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 39379 states and 163064 transitions. [2021-05-03 16:30:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:30:54,166 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:30:54,166 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:30:54,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:54,381 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:30:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:30:54,381 INFO L82 PathProgramCache]: Analyzing trace with hash -659404043, now seen corresponding path program 69 times [2021-05-03 16:30:54,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:30:54,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652244671] [2021-05-03 16:30:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:30:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:54,638 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:30:55,468 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:30:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:55,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652244671] [2021-05-03 16:30:55,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856904876] [2021-05-03 16:30:55,771 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:55,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:30:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:30:55,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:30:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:56,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:57,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:30:57,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:57,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:57,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:57,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:93 [2021-05-03 16:30:57,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:30:57,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:57,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:57,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:57,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:30:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:57,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:57,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:30:57,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610478538] [2021-05-03 16:30:57,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:30:57,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:30:57,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:30:57,810 INFO L87 Difference]: Start difference. First operand 39379 states and 163064 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:59,374 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-03 16:30:59,991 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:31:00,932 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 16:31:01,727 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-05-03 16:31:01,892 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:31:02,257 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:31:02,709 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 16:31:03,080 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:31:03,488 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-05-03 16:31:04,225 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:31:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:31:06,099 INFO L93 Difference]: Finished difference Result 84759 states and 343708 transitions. [2021-05-03 16:31:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:31:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:31:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:31:06,409 INFO L225 Difference]: With dead ends: 84759 [2021-05-03 16:31:06,409 INFO L226 Difference]: Without dead ends: 84511 [2021-05-03 16:31:06,410 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 7179.1ms TimeCoverageRelationStatistics Valid=511, Invalid=3271, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:31:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84511 states. [2021-05-03 16:31:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84511 to 39565. [2021-05-03 16:31:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39565 states, 39564 states have (on average 4.139975735517137) internal successors, (163794), 39564 states have internal predecessors, (163794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39565 states to 39565 states and 163794 transitions. [2021-05-03 16:31:08,054 INFO L78 Accepts]: Start accepts. Automaton has 39565 states and 163794 transitions. Word has length 39 [2021-05-03 16:31:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:31:08,054 INFO L480 AbstractCegarLoop]: Abstraction has 39565 states and 163794 transitions. [2021-05-03 16:31:08,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 39565 states and 163794 transitions. [2021-05-03 16:31:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:31:08,153 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:31:08,153 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:31:08,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-03 16:31:08,354 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:31:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:31:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2069317459, now seen corresponding path program 70 times [2021-05-03 16:31:08,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:31:08,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676709720] [2021-05-03 16:31:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:31:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:31:09,024 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:31:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676709720] [2021-05-03 16:31:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185955253] [2021-05-03 16:31:09,666 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:31:09,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:31:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:31:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:31:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:31:10,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:31:10,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:10,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:10,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:31:10,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:31:10,692 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:31:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-05-03 16:31:10,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:10,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:10,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:31:10,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-05-03 16:31:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:10,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:31:10,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:31:10,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701364360] [2021-05-03 16:31:10,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:31:10,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:31:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:31:10,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:31:10,880 INFO L87 Difference]: Start difference. First operand 39565 states and 163794 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:13,407 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 16:31:13,759 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:31:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:31:17,363 INFO L93 Difference]: Finished difference Result 80823 states and 332842 transitions. [2021-05-03 16:31:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:31:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:31:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:31:17,652 INFO L225 Difference]: With dead ends: 80823 [2021-05-03 16:31:17,652 INFO L226 Difference]: Without dead ends: 80768 [2021-05-03 16:31:17,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 3509.9ms TimeCoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:31:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80768 states. [2021-05-03 16:31:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80768 to 40133. [2021-05-03 16:31:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40133 states, 40132 states have (on average 4.142778829861458) internal successors, (166258), 40132 states have internal predecessors, (166258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40133 states to 40133 states and 166258 transitions. [2021-05-03 16:31:19,290 INFO L78 Accepts]: Start accepts. Automaton has 40133 states and 166258 transitions. Word has length 39 [2021-05-03 16:31:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:31:19,290 INFO L480 AbstractCegarLoop]: Abstraction has 40133 states and 166258 transitions. [2021-05-03 16:31:19,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 40133 states and 166258 transitions. [2021-05-03 16:31:19,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:31:19,393 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:31:19,393 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:31:19,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:31:19,594 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:31:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:31:19,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1588061807, now seen corresponding path program 71 times [2021-05-03 16:31:19,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:31:19,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415449353] [2021-05-03 16:31:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:31:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:31:19,788 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:31:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:20,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415449353] [2021-05-03 16:31:20,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045971860] [2021-05-03 16:31:20,548 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:31:20,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:31:20,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:31:20,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 16:31:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:31:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:31:21,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:21,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-05-03 16:31:21,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:21,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:21,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:31:21,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:72 [2021-05-03 16:31:22,592 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:31:23,743 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:31:23,949 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_32, v_prenex_30, v_prenex_34], 3=[q1]} [2021-05-03 16:31:23,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:23,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-05-03 16:31:23,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:31:24,178 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-03 16:31:24,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:24,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:24,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-05-03 16:31:24,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:31:24,401 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-05-03 16:31:24,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:24,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-05-03 16:31:24,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 16:31:24,654 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 16:31:24,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:24,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:24,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-05-03 16:31:24,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:25,059 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 16:31:25,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:25,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-05-03 16:31:25,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 15 variables, input treesize:216, output treesize:104 [2021-05-03 16:31:25,451 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:31:25,834 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:31:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:31:26,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:31:26,048 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:31:26,149 INFO L628 ElimStorePlain]: treesize reduction 14, result has 68.9 percent of original size [2021-05-03 16:31:26,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:31:26,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:21 [2021-05-03 16:31:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:26,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:31:26,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:31:26,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586845366] [2021-05-03 16:31:26,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:31:26,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:31:26,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:31:26,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:31:26,334 INFO L87 Difference]: Start difference. First operand 40133 states and 166258 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:26,748 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:31:27,063 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:31:27,541 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 24 [2021-05-03 16:31:27,952 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-05-03 16:31:28,423 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-05-03 16:31:28,933 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-05-03 16:31:29,484 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-05-03 16:31:29,954 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-05-03 16:31:30,519 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-05-03 16:31:32,003 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-05-03 16:31:32,555 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-05-03 16:31:32,912 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2021-05-03 16:31:33,173 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 16:31:33,707 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-05-03 16:31:34,188 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:31:34,674 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-05-03 16:31:34,925 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-05-03 16:31:36,221 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-05-03 16:31:36,750 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-05-03 16:31:37,323 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:31:38,140 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2021-05-03 16:31:39,616 WARN L205 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2021-05-03 16:31:40,134 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-05-03 16:31:40,802 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2021-05-03 16:31:41,035 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-05-03 16:31:41,568 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:31:41,952 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-05-03 16:31:42,148 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 16:31:42,580 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-05-03 16:31:43,843 WARN L205 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-05-03 16:31:44,169 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:31:44,674 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-05-03 16:31:44,997 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:31:45,585 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-05-03 16:31:46,305 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-05-03 16:31:46,664 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:31:47,410 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:31:48,535 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-03 16:31:49,240 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-05-03 16:31:50,081 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:31:50,787 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-05-03 16:31:51,564 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-05-03 16:31:52,347 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-05-03 16:31:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:31:52,877 INFO L93 Difference]: Finished difference Result 90147 states and 367709 transitions. [2021-05-03 16:31:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 16:31:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:31:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:31:53,218 INFO L225 Difference]: With dead ends: 90147 [2021-05-03 16:31:53,219 INFO L226 Difference]: Without dead ends: 90014 [2021-05-03 16:31:53,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 20959.2ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 16:31:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90014 states. [2021-05-03 16:31:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90014 to 41032. [2021-05-03 16:31:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41032 states, 41031 states have (on average 4.142672613389876) internal successors, (169978), 41031 states have internal predecessors, (169978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41032 states to 41032 states and 169978 transitions. [2021-05-03 16:31:54,826 INFO L78 Accepts]: Start accepts. Automaton has 41032 states and 169978 transitions. Word has length 39 [2021-05-03 16:31:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:31:54,826 INFO L480 AbstractCegarLoop]: Abstraction has 41032 states and 169978 transitions. [2021-05-03 16:31:54,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 41032 states and 169978 transitions. [2021-05-03 16:31:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:31:54,911 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:31:54,911 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:31:55,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-03 16:31:55,113 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:31:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:31:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1287912465, now seen corresponding path program 72 times [2021-05-03 16:31:55,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:31:55,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378235528] [2021-05-03 16:31:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:31:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:31:55,688 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:31:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:56,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378235528] [2021-05-03 16:31:56,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082410291] [2021-05-03 16:31:56,182 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:31:56,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:31:56,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:31:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:31:56,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:31:56,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:31:56,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:56,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:56,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:31:56,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:31:57,070 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:31:57,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:31:57,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:57,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:57,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:31:57,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:31:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:57,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:31:57,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:31:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445013430] [2021-05-03 16:31:57,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:31:57,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:31:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:31:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:31:57,200 INFO L87 Difference]: Start difference. First operand 41032 states and 169978 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:32:04,140 INFO L93 Difference]: Finished difference Result 88681 states and 365549 transitions. [2021-05-03 16:32:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:32:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:32:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:32:04,496 INFO L225 Difference]: With dead ends: 88681 [2021-05-03 16:32:04,497 INFO L226 Difference]: Without dead ends: 88626 [2021-05-03 16:32:04,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3111.4ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:32:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88626 states. [2021-05-03 16:32:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88626 to 41169. [2021-05-03 16:32:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41169 states, 41168 states have (on average 4.146060046638166) internal successors, (170685), 41168 states have internal predecessors, (170685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41169 states to 41169 states and 170685 transitions. [2021-05-03 16:32:06,130 INFO L78 Accepts]: Start accepts. Automaton has 41169 states and 170685 transitions. Word has length 39 [2021-05-03 16:32:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:32:06,130 INFO L480 AbstractCegarLoop]: Abstraction has 41169 states and 170685 transitions. [2021-05-03 16:32:06,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 41169 states and 170685 transitions. [2021-05-03 16:32:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:32:06,210 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:32:06,211 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:32:06,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:06,411 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:32:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:32:06,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2097715607, now seen corresponding path program 73 times [2021-05-03 16:32:06,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:32:06,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905870956] [2021-05-03 16:32:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:32:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:07,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905870956] [2021-05-03 16:32:07,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760958102] [2021-05-03 16:32:07,343 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:07,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:32:07,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:08,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:32:08,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:08,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:08,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:08,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:32:08,399 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:32:08,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:32:08,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:08,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:08,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:08,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:32:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:08,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:08,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:32:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790732673] [2021-05-03 16:32:08,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:32:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:32:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:32:08,645 INFO L87 Difference]: Start difference. First operand 41169 states and 170685 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:08,869 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:32:09,052 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:32:09,276 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:32:11,149 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:32:11,504 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:32:11,846 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:32:12,348 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:32:12,768 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 16:32:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:32:16,994 INFO L93 Difference]: Finished difference Result 123805 states and 502785 transitions. [2021-05-03 16:32:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:32:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:32:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:32:17,445 INFO L225 Difference]: With dead ends: 123805 [2021-05-03 16:32:17,446 INFO L226 Difference]: Without dead ends: 123750 [2021-05-03 16:32:17,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 5020.9ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:32:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123750 states. [2021-05-03 16:32:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123750 to 40312. [2021-05-03 16:32:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40312 states, 40311 states have (on average 4.139490461660589) internal successors, (166867), 40311 states have internal predecessors, (166867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40312 states to 40312 states and 166867 transitions. [2021-05-03 16:32:19,975 INFO L78 Accepts]: Start accepts. Automaton has 40312 states and 166867 transitions. Word has length 39 [2021-05-03 16:32:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:32:19,976 INFO L480 AbstractCegarLoop]: Abstraction has 40312 states and 166867 transitions. [2021-05-03 16:32:19,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 40312 states and 166867 transitions. [2021-05-03 16:32:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:32:20,070 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:32:20,070 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:32:20,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:20,271 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:32:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:32:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1492735063, now seen corresponding path program 74 times [2021-05-03 16:32:20,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:32:20,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817680483] [2021-05-03 16:32:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:32:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:20,496 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:32:21,245 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:21,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817680483] [2021-05-03 16:32:21,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182087830] [2021-05-03 16:32:21,638 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:21,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:32:21,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:32:21,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:32:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:22,539 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:32:22,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-05-03 16:32:22,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:22,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:22,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:22,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-05-03 16:32:22,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:32:22,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:22,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:22,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:22,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:32:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:22,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:22,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:32:22,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043512706] [2021-05-03 16:32:22,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:32:22,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:22,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:32:22,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:32:22,874 INFO L87 Difference]: Start difference. First operand 40312 states and 166867 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:24,029 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 16:32:24,644 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 16:32:25,367 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:25,575 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:32:26,477 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 16:32:27,734 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 16:32:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:32:30,334 INFO L93 Difference]: Finished difference Result 87552 states and 355793 transitions. [2021-05-03 16:32:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:32:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:32:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:32:30,664 INFO L225 Difference]: With dead ends: 87552 [2021-05-03 16:32:30,664 INFO L226 Difference]: Without dead ends: 87320 [2021-05-03 16:32:30,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 5256.2ms TimeCoverageRelationStatistics Valid=441, Invalid=2211, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:32:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87320 states. [2021-05-03 16:32:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87320 to 40364. [2021-05-03 16:32:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40364 states, 40363 states have (on average 4.139162103907044) internal successors, (167069), 40363 states have internal predecessors, (167069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40364 states to 40364 states and 167069 transitions. [2021-05-03 16:32:32,144 INFO L78 Accepts]: Start accepts. Automaton has 40364 states and 167069 transitions. Word has length 39 [2021-05-03 16:32:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:32:32,144 INFO L480 AbstractCegarLoop]: Abstraction has 40364 states and 167069 transitions. [2021-05-03 16:32:32,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 40364 states and 167069 transitions. [2021-05-03 16:32:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:32:32,221 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:32:32,221 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:32:32,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-05-03 16:32:32,422 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:32:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:32:32,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2088779397, now seen corresponding path program 75 times [2021-05-03 16:32:32,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:32:32,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174710830] [2021-05-03 16:32:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:32:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:32,657 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:32:33,355 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:33,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174710830] [2021-05-03 16:32:33,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069655800] [2021-05-03 16:32:33,657 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:33,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:32:33,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:32:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:32:33,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:34,473 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:32:34,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:34,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-05-03 16:32:34,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:35,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:35,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:35,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-05-03 16:32:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:32:35,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-05-03 16:32:35,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:35,398 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:32:35,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2021-05-03 16:32:35,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:35,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:32:35,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:35,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-05-03 16:32:35,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:35,516 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:32:35,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-05-03 16:32:35,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:35,780 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:32:35,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:35,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:32:35,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:255 [2021-05-03 16:32:36,267 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 16:32:36,521 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:32:36,859 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-03 16:32:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:37,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:37,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:32:37,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194562018] [2021-05-03 16:32:37,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:32:37,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:32:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:32:37,183 INFO L87 Difference]: Start difference. First operand 40364 states and 167069 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:38,390 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 16:32:39,228 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:32:41,016 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2021-05-03 16:32:41,407 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:32:41,844 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-05-03 16:32:42,110 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 16:32:42,895 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:32:43,184 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-03 16:32:43,387 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-05-03 16:32:43,831 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 16:32:44,086 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-05-03 16:32:44,559 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 16:32:44,889 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:32:45,262 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:32:45,823 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:32:45,999 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:32:46,202 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:32:46,414 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 16:32:46,748 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:32:47,178 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 16:32:47,428 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 16:32:47,634 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-03 16:32:48,285 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-05-03 16:32:48,482 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-05-03 16:32:49,176 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 16:32:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:32:49,582 INFO L93 Difference]: Finished difference Result 79215 states and 320364 transitions. [2021-05-03 16:32:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:32:49,586 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:32:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:32:49,815 INFO L225 Difference]: With dead ends: 79215 [2021-05-03 16:32:49,815 INFO L226 Difference]: Without dead ends: 78957 [2021-05-03 16:32:49,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 10481.9ms TimeCoverageRelationStatistics Valid=801, Invalid=4311, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 16:32:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78957 states. [2021-05-03 16:32:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78957 to 40390. [2021-05-03 16:32:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40390 states, 40389 states have (on average 4.139320111911659) internal successors, (167183), 40389 states have internal predecessors, (167183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40390 states to 40390 states and 167183 transitions. [2021-05-03 16:32:51,038 INFO L78 Accepts]: Start accepts. Automaton has 40390 states and 167183 transitions. Word has length 39 [2021-05-03 16:32:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:32:51,038 INFO L480 AbstractCegarLoop]: Abstraction has 40390 states and 167183 transitions. [2021-05-03 16:32:51,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 40390 states and 167183 transitions. [2021-05-03 16:32:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:32:51,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:32:51,117 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:32:51,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:51,317 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:32:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:32:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1884858651, now seen corresponding path program 76 times [2021-05-03 16:32:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:32:51,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829822327] [2021-05-03 16:32:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:32:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:52,066 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829822327] [2021-05-03 16:32:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022426255] [2021-05-03 16:32:52,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:52,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:32:52,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:32:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:32:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:53,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:32:53,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:53,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:53,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:53,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:32:53,331 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:32:53,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:32:53,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:53,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:53,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:53,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:32:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:53,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:53,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:32:53,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16547855] [2021-05-03 16:32:53,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:32:53,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:53,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:32:53,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:32:53,511 INFO L87 Difference]: Start difference. First operand 40390 states and 167183 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:54,002 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:32:54,437 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:32:55,031 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:32:56,321 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:32:57,945 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:32:59,563 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-05-03 16:33:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:33:00,490 INFO L93 Difference]: Finished difference Result 75640 states and 308874 transitions. [2021-05-03 16:33:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:33:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:33:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:33:00,716 INFO L225 Difference]: With dead ends: 75640 [2021-05-03 16:33:00,716 INFO L226 Difference]: Without dead ends: 75550 [2021-05-03 16:33:00,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 4037.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:33:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75550 states. [2021-05-03 16:33:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75550 to 40506. [2021-05-03 16:33:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40506 states, 40505 states have (on average 4.139711146772004) internal successors, (167679), 40505 states have internal predecessors, (167679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40506 states to 40506 states and 167679 transitions. [2021-05-03 16:33:02,027 INFO L78 Accepts]: Start accepts. Automaton has 40506 states and 167679 transitions. Word has length 39 [2021-05-03 16:33:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:33:02,027 INFO L480 AbstractCegarLoop]: Abstraction has 40506 states and 167679 transitions. [2021-05-03 16:33:02,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 40506 states and 167679 transitions. [2021-05-03 16:33:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:33:02,448 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:33:02,448 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:33:02,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:02,661 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:33:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:33:02,661 INFO L82 PathProgramCache]: Analyzing trace with hash 278457189, now seen corresponding path program 77 times [2021-05-03 16:33:02,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:33:02,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003894666] [2021-05-03 16:33:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:33:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:03,414 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:33:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003894666] [2021-05-03 16:33:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130016763] [2021-05-03 16:33:03,693 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:03,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:33:03,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:33:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:33:03,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:33:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:04,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:05,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-05-03 16:33:05,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:05,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:05,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:33:05,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:73 [2021-05-03 16:33:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:05,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:05,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:06,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:06,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-05-03 16:33:06,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:33:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:06,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-05-03 16:33:06,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:06,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:06,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:06,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:06,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-05-03 16:33:06,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:06,308 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-03 16:33:06,309 INFO L628 ElimStorePlain]: treesize reduction 25, result has 73.1 percent of original size [2021-05-03 16:33:06,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-05-03 16:33:06,325 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:154, output treesize:52 [2021-05-03 16:33:06,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:06,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-05-03 16:33:06,689 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:06,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:06,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:06,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-05-03 16:33:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:06,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:33:06,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:33:06,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115142258] [2021-05-03 16:33:06,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:33:06,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:33:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:33:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:33:06,997 INFO L87 Difference]: Start difference. First operand 40506 states and 167679 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:07,387 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 16:33:07,659 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:33:08,071 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:33:08,432 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 16:33:09,140 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 16:33:09,542 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:33:10,867 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-03 16:33:11,410 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 16:33:11,749 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:33:12,929 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-05-03 16:33:13,181 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:33:14,014 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-05-03 16:33:14,901 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-05-03 16:33:15,268 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-05-03 16:33:15,588 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 16:33:16,061 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:33:16,657 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:33:16,948 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 16:33:17,228 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-05-03 16:33:17,650 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:33:18,014 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 16:33:18,261 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:33:18,672 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 16:33:19,355 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 16:33:19,681 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-05-03 16:33:20,286 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 16:33:22,061 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:33:23,793 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 16:33:24,181 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 16:33:25,078 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-05-03 16:33:25,340 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-03 16:33:26,498 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:33:27,826 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:33:28,447 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-05-03 16:33:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:33:29,157 INFO L93 Difference]: Finished difference Result 113735 states and 460760 transitions. [2021-05-03 16:33:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 16:33:29,160 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:33:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:33:29,553 INFO L225 Difference]: With dead ends: 113735 [2021-05-03 16:33:29,553 INFO L226 Difference]: Without dead ends: 113354 [2021-05-03 16:33:29,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 14811.7ms TimeCoverageRelationStatistics Valid=1285, Invalid=7645, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 16:33:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113354 states. [2021-05-03 16:33:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113354 to 40488. [2021-05-03 16:33:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40488 states, 40487 states have (on average 4.139427470546101) internal successors, (167593), 40487 states have internal predecessors, (167593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40488 states to 40488 states and 167593 transitions. [2021-05-03 16:33:31,322 INFO L78 Accepts]: Start accepts. Automaton has 40488 states and 167593 transitions. Word has length 39 [2021-05-03 16:33:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:33:31,322 INFO L480 AbstractCegarLoop]: Abstraction has 40488 states and 167593 transitions. [2021-05-03 16:33:31,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 40488 states and 167593 transitions. [2021-05-03 16:33:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:33:31,397 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:33:31,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:33:31,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-05-03 16:33:31,598 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:33:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:33:31,598 INFO L82 PathProgramCache]: Analyzing trace with hash -120548947, now seen corresponding path program 78 times [2021-05-03 16:33:31,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:33:31,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223175703] [2021-05-03 16:33:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:33:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:32,141 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 16:33:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223175703] [2021-05-03 16:33:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812442851] [2021-05-03 16:33:32,911 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:32,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:33:32,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:33:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:33:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:33:33,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:33:33,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:33,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:33,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:33,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-05-03 16:33:33,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:33:33,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-05-03 16:33:33,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:33,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:33,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:33,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-05-03 16:33:34,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:34,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:33:34,028 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:34,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:34,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:34,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:33:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:34,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:33:34,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:33:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676561533] [2021-05-03 16:33:34,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:33:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:33:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:33:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:33:34,211 INFO L87 Difference]: Start difference. First operand 40488 states and 167593 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:34,846 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 16:33:36,006 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:33:36,322 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 16:33:37,212 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:33:37,610 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:33:39,671 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 16:33:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:33:42,205 INFO L93 Difference]: Finished difference Result 96582 states and 397880 transitions. [2021-05-03 16:33:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:33:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:33:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:33:42,509 INFO L225 Difference]: With dead ends: 96582 [2021-05-03 16:33:42,510 INFO L226 Difference]: Without dead ends: 96527 [2021-05-03 16:33:42,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 4728.9ms TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:33:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96527 states. [2021-05-03 16:33:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96527 to 42316. [2021-05-03 16:33:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42316 states, 42315 states have (on average 4.139170506912443) internal successors, (175149), 42315 states have internal predecessors, (175149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42316 states to 42316 states and 175149 transitions. [2021-05-03 16:33:43,970 INFO L78 Accepts]: Start accepts. Automaton has 42316 states and 175149 transitions. Word has length 39 [2021-05-03 16:33:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:33:43,970 INFO L480 AbstractCegarLoop]: Abstraction has 42316 states and 175149 transitions. [2021-05-03 16:33:43,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 42316 states and 175149 transitions. [2021-05-03 16:33:44,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:33:44,051 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:33:44,051 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:33:44,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:44,253 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:33:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:33:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash -758136977, now seen corresponding path program 79 times [2021-05-03 16:33:44,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:33:44,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158229116] [2021-05-03 16:33:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:33:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:44,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:33:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:45,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158229116] [2021-05-03 16:33:45,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507085105] [2021-05-03 16:33:45,269 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:33:45,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:33:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:33:45,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:45,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:45,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:45,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-05-03 16:33:46,337 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:33:46,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:33:46,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:46,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:46,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:46,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:33:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:46,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:33:46,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:33:46,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162915627] [2021-05-03 16:33:46,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:33:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:33:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:33:46,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:33:46,517 INFO L87 Difference]: Start difference. First operand 42316 states and 175149 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:48,428 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:33:48,923 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:33:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:33:54,237 INFO L93 Difference]: Finished difference Result 97967 states and 404050 transitions. [2021-05-03 16:33:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:33:54,241 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:33:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:33:54,535 INFO L225 Difference]: With dead ends: 97967 [2021-05-03 16:33:54,535 INFO L226 Difference]: Without dead ends: 97912 [2021-05-03 16:33:54,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3460.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:33:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97912 states. [2021-05-03 16:33:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97912 to 44367. [2021-05-03 16:33:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44367 states, 44366 states have (on average 4.141955551548483) internal successors, (183762), 44366 states have internal predecessors, (183762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44367 states to 44367 states and 183762 transitions. [2021-05-03 16:33:56,583 INFO L78 Accepts]: Start accepts. Automaton has 44367 states and 183762 transitions. Word has length 39 [2021-05-03 16:33:56,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:33:56,583 INFO L480 AbstractCegarLoop]: Abstraction has 44367 states and 183762 transitions. [2021-05-03 16:33:56,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 44367 states and 183762 transitions. [2021-05-03 16:33:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:33:56,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:33:56,680 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:33:56,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-05-03 16:33:56,880 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:33:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:33:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 660856047, now seen corresponding path program 80 times [2021-05-03 16:33:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:33:56,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111116558] [2021-05-03 16:33:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:33:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:57,066 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:33:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:57,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111116558] [2021-05-03 16:33:57,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553261763] [2021-05-03 16:33:57,859 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:57,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:33:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:33:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:33:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:33:58,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:33:58,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:58,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:58,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:58,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-05-03 16:33:58,921 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:33:58,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:33:58,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:58,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:58,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:58,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:33:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:59,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:33:59,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:33:59,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194506294] [2021-05-03 16:33:59,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:33:59,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:33:59,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:33:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:33:59,088 INFO L87 Difference]: Start difference. First operand 44367 states and 183762 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:00,739 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:34:01,123 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 16:34:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:34:06,096 INFO L93 Difference]: Finished difference Result 94017 states and 387403 transitions. [2021-05-03 16:34:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:34:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:34:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:34:06,434 INFO L225 Difference]: With dead ends: 94017 [2021-05-03 16:34:06,434 INFO L226 Difference]: Without dead ends: 93962 [2021-05-03 16:34:06,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 3501.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:34:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93962 states. [2021-05-03 16:34:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93962 to 43759. [2021-05-03 16:34:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43759 states, 43758 states have (on average 4.140911376205493) internal successors, (181198), 43758 states have internal predecessors, (181198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43759 states to 43759 states and 181198 transitions. [2021-05-03 16:34:07,978 INFO L78 Accepts]: Start accepts. Automaton has 43759 states and 181198 transitions. Word has length 39 [2021-05-03 16:34:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:34:07,978 INFO L480 AbstractCegarLoop]: Abstraction has 43759 states and 181198 transitions. [2021-05-03 16:34:07,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 43759 states and 181198 transitions. [2021-05-03 16:34:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:34:08,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:34:08,071 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:34:08,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-05-03 16:34:08,272 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:34:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:34:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1354477999, now seen corresponding path program 81 times [2021-05-03 16:34:08,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:34:08,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859057575] [2021-05-03 16:34:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:34:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:34:08,513 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:34:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859057575] [2021-05-03 16:34:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495760651] [2021-05-03 16:34:09,349 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:09,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:34:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:34:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-03 16:34:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:34:10,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:10,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-05-03 16:34:10,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:10,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:10,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:10,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-05-03 16:34:10,960 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 16:34:11,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:11,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-05-03 16:34:11,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:34:11,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:11,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-05-03 16:34:11,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:34:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:11,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:11,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-05-03 16:34:11,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:11,815 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:34:11,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:11,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:34:11,836 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:183, output treesize:198 [2021-05-03 16:34:12,087 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:34:12,665 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:34:12,720 INFO L446 ElimStorePlain]: Different costs {0=[q2], 1=[v_prenex_36]} [2021-05-03 16:34:12,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2021-05-03 16:34:12,738 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:34:12,859 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:34:12,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:12,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:12,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-05-03 16:34:12,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:13,015 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 16:34:13,016 INFO L628 ElimStorePlain]: treesize reduction 13, result has 72.3 percent of original size [2021-05-03 16:34:13,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:34:13,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:32 [2021-05-03 16:34:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:13,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:34:13,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:34:13,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811048610] [2021-05-03 16:34:13,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:34:13,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:34:13,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:34:13,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:34:13,264 INFO L87 Difference]: Start difference. First operand 43759 states and 181198 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:16,690 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-05-03 16:34:18,784 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-05-03 16:34:19,892 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-05-03 16:34:20,431 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:34:20,680 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-03 16:34:21,542 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 16:34:22,115 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 16:34:22,385 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 16:34:22,942 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:34:23,893 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:34:24,723 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:34:25,244 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-05-03 16:34:25,820 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-05-03 16:34:26,617 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:34:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:34:27,117 INFO L93 Difference]: Finished difference Result 85716 states and 351669 transitions. [2021-05-03 16:34:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:34:27,120 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:34:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:34:27,406 INFO L225 Difference]: With dead ends: 85716 [2021-05-03 16:34:27,406 INFO L226 Difference]: Without dead ends: 85634 [2021-05-03 16:34:27,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 9722.5ms TimeCoverageRelationStatistics Valid=461, Invalid=3571, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:34:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85634 states. [2021-05-03 16:34:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85634 to 43965. [2021-05-03 16:34:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43965 states, 43964 states have (on average 4.1390910745155125) internal successors, (181971), 43964 states have internal predecessors, (181971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43965 states to 43965 states and 181971 transitions. [2021-05-03 16:34:28,886 INFO L78 Accepts]: Start accepts. Automaton has 43965 states and 181971 transitions. Word has length 39 [2021-05-03 16:34:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:34:28,886 INFO L480 AbstractCegarLoop]: Abstraction has 43965 states and 181971 transitions. [2021-05-03 16:34:28,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 43965 states and 181971 transitions. [2021-05-03 16:34:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:34:28,980 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:34:28,980 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:34:29,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-05-03 16:34:29,181 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:34:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:34:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1521496273, now seen corresponding path program 82 times [2021-05-03 16:34:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:34:29,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500126039] [2021-05-03 16:34:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:34:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:34:29,413 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:34:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:30,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500126039] [2021-05-03 16:34:30,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455415375] [2021-05-03 16:34:30,288 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:30,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:34:30,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:34:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:34:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:34:30,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:34:30,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:30,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:30,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:30,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-05-03 16:34:31,354 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:34:31,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:34:31,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:31,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:31,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:31,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:34:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:31,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:34:31,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:34:31,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705231945] [2021-05-03 16:34:31,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:34:31,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:34:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:34:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:34:31,521 INFO L87 Difference]: Start difference. First operand 43965 states and 181971 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:34,506 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 16:34:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:34:41,104 INFO L93 Difference]: Finished difference Result 94685 states and 390543 transitions. [2021-05-03 16:34:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:34:41,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:34:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:34:41,389 INFO L225 Difference]: With dead ends: 94685 [2021-05-03 16:34:41,389 INFO L226 Difference]: Without dead ends: 94630 [2021-05-03 16:34:41,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 3501.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:34:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94630 states. [2021-05-03 16:34:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94630 to 44548. [2021-05-03 16:34:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44548 states, 44547 states have (on average 4.142703212337532) internal successors, (184545), 44547 states have internal predecessors, (184545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44548 states to 44548 states and 184545 transitions. [2021-05-03 16:34:43,546 INFO L78 Accepts]: Start accepts. Automaton has 44548 states and 184545 transitions. Word has length 39 [2021-05-03 16:34:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:34:43,546 INFO L480 AbstractCegarLoop]: Abstraction has 44548 states and 184545 transitions. [2021-05-03 16:34:43,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 44548 states and 184545 transitions. [2021-05-03 16:34:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:34:43,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:34:43,640 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:34:43,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:43,841 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:34:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:34:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash -855789521, now seen corresponding path program 83 times [2021-05-03 16:34:43,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:34:43,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094208009] [2021-05-03 16:34:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:34:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:34:44,048 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:34:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:44,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094208009] [2021-05-03 16:34:44,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627467154] [2021-05-03 16:34:44,817 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:44,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:34:44,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:34:44,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:34:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:34:45,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:45,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:45,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 65 [2021-05-03 16:34:45,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:46,054 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:34:46,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:46,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:34:46,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:87 [2021-05-03 16:34:47,387 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-03 16:34:48,954 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:34:49,371 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_54, v_prenex_57, v_prenex_48], 3=[q2, v_prenex_51]} [2021-05-03 16:34:49,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:49,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:34:49,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:49,639 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-03 16:34:49,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:49,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:34:49,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:49,889 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 16:34:49,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-05-03 16:34:49,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:50,123 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 16:34:50,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:34:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:50,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-05-03 16:34:50,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:50,344 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:34:50,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:50,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:34:50,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-05-03 16:34:50,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:50,573 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:34:50,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:50,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:34:50,584 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 17 variables, input treesize:204, output treesize:69 [2021-05-03 16:34:50,845 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 16:34:51,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:51,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:51,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:51,391 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 16:34:51,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:51,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-05-03 16:34:51,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:34:51,519 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:34:51,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:51,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:34:51,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:58 [2021-05-03 16:34:51,808 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:34:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:52,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:34:52,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:34:52,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588164575] [2021-05-03 16:34:52,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:34:52,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:34:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:34:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:34:52,109 INFO L87 Difference]: Start difference. First operand 44548 states and 184545 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:52,551 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 16:34:52,831 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:34:53,207 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:34:54,085 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 30 [2021-05-03 16:34:54,846 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 37 [2021-05-03 16:34:55,714 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-05-03 16:34:56,538 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 44 [2021-05-03 16:34:57,678 WARN L205 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 16:34:58,397 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-05-03 16:34:59,080 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-05-03 16:34:59,756 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 16:35:00,467 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-05-03 16:35:01,114 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2021-05-03 16:35:01,765 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 16:35:02,193 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:35:02,555 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:35:03,157 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-03 16:35:03,715 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:35:04,567 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-03 16:35:05,262 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-05-03 16:35:06,252 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-05-03 16:35:06,758 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-05-03 16:35:07,449 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-05-03 16:35:08,446 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-05-03 16:35:09,600 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-05-03 16:35:10,371 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-05-03 16:35:11,290 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-05-03 16:35:12,440 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-05-03 16:35:13,419 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-05-03 16:35:14,003 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:35:14,839 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-05-03 16:35:15,496 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-03 16:35:16,892 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-05-03 16:35:18,479 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-05-03 16:35:19,287 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-05-03 16:35:19,804 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-03 16:35:20,496 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-05-03 16:35:21,148 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-05-03 16:35:21,992 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-05-03 16:35:22,724 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-05-03 16:35:23,505 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-05-03 16:35:24,368 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-05-03 16:35:25,421 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-03 16:35:25,717 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:35:26,048 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:35:26,468 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:35:27,408 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-05-03 16:35:28,532 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-05-03 16:35:29,242 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-05-03 16:35:29,807 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-05-03 16:35:30,977 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2021-05-03 16:35:31,702 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-03 16:35:32,052 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:35:32,396 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 16:35:33,140 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-03 16:35:33,854 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-03 16:35:34,344 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 Received shutdown request... [2021-05-03 16:35:35,379 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-05-03 16:35:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 16:35:35,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-05-03 16:35:35,580 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 16:35:35,583 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 16:35:35,584 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:35:35 BasicIcfg [2021-05-03 16:35:35,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:35:35,584 INFO L168 Benchmark]: Toolchain (without parser) took 761483.42 ms. Allocated memory was 352.3 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 331.7 MB in the beginning and 13.7 GB in the end (delta: -13.4 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.0 GB. [2021-05-03 16:35:35,584 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 352.3 MB. Free memory was 333.0 MB in the beginning and 332.9 MB in the end (delta: 71.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:35:35,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.43 ms. Allocated memory is still 352.3 MB. Free memory was 331.7 MB in the beginning and 330.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:35:35,584 INFO L168 Benchmark]: Boogie Preprocessor took 19.55 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 329.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:35:35,584 INFO L168 Benchmark]: RCFGBuilder took 386.75 ms. Allocated memory is still 352.3 MB. Free memory was 329.1 MB in the beginning and 314.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 16:35:35,584 INFO L168 Benchmark]: TraceAbstraction took 761036.48 ms. Allocated memory was 352.3 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 313.7 MB in the beginning and 13.7 GB in the end (delta: -13.4 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.0 GB. [2021-05-03 16:35:35,584 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 0.24 ms. Allocated memory is still 352.3 MB. Free memory was 333.0 MB in the beginning and 332.9 MB in the end (delta: 71.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 35.43 ms. Allocated memory is still 352.3 MB. Free memory was 331.7 MB in the beginning and 330.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.55 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 329.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 386.75 ms. Allocated memory is still 352.3 MB. Free memory was 329.1 MB in the beginning and 314.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 761036.48 ms. Allocated memory was 352.3 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 313.7 MB in the beginning and 13.7 GB in the end (delta: -13.4 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 82). Cancelled while BasicCegarLoop was constructing difference of abstraction (44548states) and FLOYD_HOARE automaton (currently 73 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 108 for 201ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 760876.4ms, OverallIterations: 92, TraceHistogramMax: 2, EmptinessCheckTime: 7706.9ms, AutomataDifference: 478708.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 96.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6455 SDtfs, 36358 SDslu, 72229 SDs, 0 SdLazy, 129631 SolverSat, 6853 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97072.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6149 GetRequests, 2325 SyntacticMatches, 101 SemanticMatches, 3722 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58895 ImplicationChecksByTransitivity, 311395.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44548occurred in iteration=91, InterpolantAutomatonStates: 2689, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 111292.9ms AutomataMinimizationTime, 91 MinimizatonAttempts, 2748808 StatesRemovedByMinimization, 91 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 548.9ms SsaConstructionTime, 2104.0ms SatisfiabilityAnalysisTime, 140696.6ms InterpolantComputationTime, 6523 NumberOfCodeBlocks, 6519 NumberOfCodeBlocksAsserted, 313 NumberOfCheckSat, 6345 ConstructedInterpolants, 287 QuantifiedInterpolants, 147452 SizeOfPredicates, 596 NumberOfNonLiveVariables, 9635 ConjunctsInSsa, 3034 ConjunctsInUnsatCore, 178 InterpolantComputations, 8 PerfectInterpolantSequences, 222/2676 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown