/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:06:41,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:06:41,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:06:42,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:06:42,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:06:42,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:06:42,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:06:42,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:06:42,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:06:42,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:06:42,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:06:42,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:06:42,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:06:42,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:06:42,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:06:42,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:06:42,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:06:42,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:06:42,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:06:42,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:06:42,085 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 [2021-07-13 20:06:42,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:06:42,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:06:42,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:06:42,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:06:42,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:06:42,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:06:42,130 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:06:42,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:06:42,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:06:42,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:06:42,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:06:42,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:06:42,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:06:42,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:06:42,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:06:42,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:06:42,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:06:42,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:06:42,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:06:42,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:06:42,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:06:42,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:06:42,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:06:42,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:06:42,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:06:42,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:06:42,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:06:42,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:06:42,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:06:42,135 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:06:42,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:06:42,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:06:42,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:06:42,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:06:42,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:06:42,491 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:06:42,492 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:06:42,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl [2021-07-13 20:06:42,493 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl' [2021-07-13 20:06:42,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:06:42,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:06:42,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:42,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:06:42,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:06:42,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:42,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:06:42,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:06:42,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:06:42,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/1) ... [2021-07-13 20:06:42,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:06:42,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:06:42,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:06:42,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:06:42,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (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 [2021-07-13 20:06:42,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:06:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:06:42,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:06:42,669 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:06:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:06:42,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:06:42,670 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:06:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:06:42,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:06:42,670 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:06:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:06:42,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:06:42,671 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:06:42,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:06:42,920 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:06:42,922 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:42 BoogieIcfgContainer [2021-07-13 20:06:42,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:06:42,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:06:42,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:06:42,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:06:42,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:42" (1/2) ... [2021-07-13 20:06:42,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e44fdb and model type queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:06:42, skipping insertion in model container [2021-07-13 20:06:42,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:42" (2/2) ... [2021-07-13 20:06:42,928 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3.wvr.bpl [2021-07-13 20:06:42,948 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:06:42,949 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:06:42,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:06:42,950 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:06:42,991 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:06:43,015 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:06:43,047 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:06:43,047 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:06:43,047 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:06:43,048 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:06:43,048 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:06:43,048 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:06:43,048 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:06:43,048 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:06:43,057 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 38 transitions, 100 flow [2021-07-13 20:06:43,113 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 659 states, 658 states have (on average 2.966565349544073) internal successors, (1952), 658 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 659 states, 658 states have (on average 2.966565349544073) internal successors, (1952), 658 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:06:43,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:43,145 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:43,146 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:43,150 INFO L82 PathProgramCache]: Analyzing trace with hash -460395558, now seen corresponding path program 1 times [2021-07-13 20:06:43,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:43,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870943235] [2021-07-13 20:06:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:43,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870943235] [2021-07-13 20:06:43,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870943235] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:43,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:43,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:06:43,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143593334] [2021-07-13 20:06:43,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:43,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:43,304 INFO L87 Difference]: Start difference. First operand has 659 states, 658 states have (on average 2.966565349544073) internal successors, (1952), 658 states have internal predecessors, (1952), 0 states have call successors, (0), 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 7.0) 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) [2021-07-13 20:06:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:43,363 INFO L93 Difference]: Finished difference Result 732 states and 2170 transitions. [2021-07-13 20:06:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) 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 [2021-07-13 20:06:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:43,394 INFO L225 Difference]: With dead ends: 732 [2021-07-13 20:06:43,394 INFO L226 Difference]: Without dead ends: 732 [2021-07-13 20:06:43,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-07-13 20:06:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-07-13 20:06:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.9685362517099865) internal successors, (2170), 731 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2170 transitions. [2021-07-13 20:06:43,502 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2170 transitions. Word has length 21 [2021-07-13 20:06:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:43,503 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 2170 transitions. [2021-07-13 20:06:43,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) 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) [2021-07-13 20:06:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2170 transitions. [2021-07-13 20:06:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:43,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:43,508 INFO L508 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] [2021-07-13 20:06:43,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:06:43,509 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1781646153, now seen corresponding path program 1 times [2021-07-13 20:06:43,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:43,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601274193] [2021-07-13 20:06:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:43,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601274193] [2021-07-13 20:06:43,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601274193] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:43,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:43,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:06:43,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458527066] [2021-07-13 20:06:43,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:43,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:43,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:43,598 INFO L87 Difference]: Start difference. First operand 732 states and 2170 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:43,617 INFO L93 Difference]: Finished difference Result 851 states and 2466 transitions. [2021-07-13 20:06:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:43,623 INFO L225 Difference]: With dead ends: 851 [2021-07-13 20:06:43,623 INFO L226 Difference]: Without dead ends: 769 [2021-07-13 20:06:43,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-07-13 20:06:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2021-07-13 20:06:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.91796875) internal successors, (2241), 768 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2241 transitions. [2021-07-13 20:06:43,652 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2241 transitions. Word has length 25 [2021-07-13 20:06:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:43,652 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2241 transitions. [2021-07-13 20:06:43,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2241 transitions. [2021-07-13 20:06:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:06:43,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:43,656 INFO L508 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, 1] [2021-07-13 20:06:43,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:06:43,657 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1118695019, now seen corresponding path program 1 times [2021-07-13 20:06:43,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:43,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465090294] [2021-07-13 20:06:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:43,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465090294] [2021-07-13 20:06:43,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465090294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:43,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239029564] [2021-07-13 20:06:43,901 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 [2021-07-13 20:06:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:43,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239029564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:44,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:06:44,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665600647] [2021-07-13 20:06:44,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:06:44,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:06:44,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:44,203 INFO L87 Difference]: Start difference. First operand 769 states and 2241 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) [2021-07-13 20:06:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:44,488 INFO L93 Difference]: Finished difference Result 1791 states and 5134 transitions. [2021-07-13 20:06:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:06:44,493 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 30 [2021-07-13 20:06:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:44,503 INFO L225 Difference]: With dead ends: 1791 [2021-07-13 20:06:44,503 INFO L226 Difference]: Without dead ends: 1732 [2021-07-13 20:06:44,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:06:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-07-13 20:06:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1087. [2021-07-13 20:06:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.8683241252302025) internal successors, (3115), 1086 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3115 transitions. [2021-07-13 20:06:44,553 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3115 transitions. Word has length 30 [2021-07-13 20:06:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:44,553 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3115 transitions. [2021-07-13 20:06:44,553 INFO L483 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) [2021-07-13 20:06:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3115 transitions. [2021-07-13 20:06:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:06:44,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:44,557 INFO L508 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, 1] [2021-07-13 20:06:44,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:06:44,771 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash 386727311, now seen corresponding path program 2 times [2021-07-13 20:06:44,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:44,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752337313] [2021-07-13 20:06:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:44,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:44,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752337313] [2021-07-13 20:06:44,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752337313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781772298] [2021-07-13 20:06:44,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:44,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:44,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:45,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781772298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:45,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:45,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:06:45,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850978686] [2021-07-13 20:06:45,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:06:45,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:45,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:06:45,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:06:45,109 INFO L87 Difference]: Start difference. First operand 1087 states and 3115 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-07-13 20:06:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:45,385 INFO L93 Difference]: Finished difference Result 2154 states and 6168 transitions. [2021-07-13 20:06:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:06:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 30 [2021-07-13 20:06:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:45,397 INFO L225 Difference]: With dead ends: 2154 [2021-07-13 20:06:45,397 INFO L226 Difference]: Without dead ends: 2095 [2021-07-13 20:06:45,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:06:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-07-13 20:06:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1130. [2021-07-13 20:06:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.906997342781222) internal successors, (3282), 1129 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3282 transitions. [2021-07-13 20:06:45,443 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3282 transitions. Word has length 30 [2021-07-13 20:06:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:45,443 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3282 transitions. [2021-07-13 20:06:45,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-07-13 20:06:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3282 transitions. [2021-07-13 20:06:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:06:45,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:45,448 INFO L508 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, 1] [2021-07-13 20:06:45,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:45,657 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:45,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1305070307, now seen corresponding path program 3 times [2021-07-13 20:06:45,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:45,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861837808] [2021-07-13 20:06:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:45,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:45,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861837808] [2021-07-13 20:06:45,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861837808] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:45,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:45,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:06:45,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126433537] [2021-07-13 20:06:45,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:45,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:45,688 INFO L87 Difference]: Start difference. First operand 1130 states and 3282 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:45,701 INFO L93 Difference]: Finished difference Result 999 states and 2818 transitions. [2021-07-13 20:06:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:06:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:45,707 INFO L225 Difference]: With dead ends: 999 [2021-07-13 20:06:45,707 INFO L226 Difference]: Without dead ends: 999 [2021-07-13 20:06:45,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-13 20:06:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 999. [2021-07-13 20:06:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 2.823647294589178) internal successors, (2818), 998 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2818 transitions. [2021-07-13 20:06:45,745 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2818 transitions. Word has length 30 [2021-07-13 20:06:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:45,745 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 2818 transitions. [2021-07-13 20:06:45,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2818 transitions. [2021-07-13 20:06:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:06:45,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:45,749 INFO L508 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, 1] [2021-07-13 20:06:45,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:06:45,750 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:45,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:45,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1146472187, now seen corresponding path program 4 times [2021-07-13 20:06:45,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:45,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884365780] [2021-07-13 20:06:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:45,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:45,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884365780] [2021-07-13 20:06:45,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884365780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:45,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563794302] [2021-07-13 20:06:45,863 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 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 [2021-07-13 20:06:45,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:45,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:46,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563794302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:46,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:46,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:06:46,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202020689] [2021-07-13 20:06:46,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:06:46,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:46,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:06:46,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:06:46,082 INFO L87 Difference]: Start difference. First operand 999 states and 2818 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-07-13 20:06:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:46,315 INFO L93 Difference]: Finished difference Result 1442 states and 4013 transitions. [2021-07-13 20:06:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:06:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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 30 [2021-07-13 20:06:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:46,323 INFO L225 Difference]: With dead ends: 1442 [2021-07-13 20:06:46,323 INFO L226 Difference]: Without dead ends: 1397 [2021-07-13 20:06:46,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-07-13 20:06:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 975. [2021-07-13 20:06:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.8213552361396306) internal successors, (2748), 974 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2748 transitions. [2021-07-13 20:06:46,353 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2748 transitions. Word has length 30 [2021-07-13 20:06:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:46,353 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2748 transitions. [2021-07-13 20:06:46,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-07-13 20:06:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2748 transitions. [2021-07-13 20:06:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:06:46,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:46,356 INFO L508 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, 1, 1, 1, 1] [2021-07-13 20:06:46,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:46,581 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash -835644288, now seen corresponding path program 1 times [2021-07-13 20:06:46,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:46,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979354768] [2021-07-13 20:06:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:46,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:46,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979354768] [2021-07-13 20:06:46,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979354768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:46,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804529468] [2021-07-13 20:06:46,615 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 [2021-07-13 20:06:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:06:46,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:46,729 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 11 treesize of output 7 [2021-07-13 20:06:46,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:46,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:46,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:46,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:06:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:46,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804529468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:46,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:46,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:06:46,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312732664] [2021-07-13 20:06:46,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:06:46,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:46,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:06:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:06:46,751 INFO L87 Difference]: Start difference. First operand 975 states and 2748 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) [2021-07-13 20:06:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:46,832 INFO L93 Difference]: Finished difference Result 1251 states and 3576 transitions. [2021-07-13 20:06:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:06:46,833 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 33 [2021-07-13 20:06:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:46,839 INFO L225 Difference]: With dead ends: 1251 [2021-07-13 20:06:46,839 INFO L226 Difference]: Without dead ends: 1251 [2021-07-13 20:06:46,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-07-13 20:06:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1182. [2021-07-13 20:06:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.852667231160034) internal successors, (3369), 1181 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3369 transitions. [2021-07-13 20:06:46,871 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3369 transitions. Word has length 33 [2021-07-13 20:06:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:46,871 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3369 transitions. [2021-07-13 20:06:46,871 INFO L483 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) [2021-07-13 20:06:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3369 transitions. [2021-07-13 20:06:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:06:46,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:46,875 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:47,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:47,100 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash -842779128, now seen corresponding path program 5 times [2021-07-13 20:06:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:47,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321068988] [2021-07-13 20:06:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:47,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321068988] [2021-07-13 20:06:47,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321068988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682521281] [2021-07-13 20:06:47,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:47,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:06:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:06:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:47,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682521281] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:47,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:06:47,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-07-13 20:06:47,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83674618] [2021-07-13 20:06:47,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:06:47,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:06:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:06:47,283 INFO L87 Difference]: Start difference. First operand 1182 states and 3369 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2021-07-13 20:06:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:47,303 INFO L93 Difference]: Finished difference Result 2091 states and 5916 transitions. [2021-07-13 20:06:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:06:47,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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 34 [2021-07-13 20:06:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:47,318 INFO L225 Difference]: With dead ends: 2091 [2021-07-13 20:06:47,318 INFO L226 Difference]: Without dead ends: 2023 [2021-07-13 20:06:47,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:06:47,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-07-13 20:06:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1796. [2021-07-13 20:06:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.8924791086350976) internal successors, (5192), 1795 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 5192 transitions. [2021-07-13 20:06:47,376 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 5192 transitions. Word has length 34 [2021-07-13 20:06:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:47,377 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 5192 transitions. [2021-07-13 20:06:47,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2021-07-13 20:06:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 5192 transitions. [2021-07-13 20:06:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 20:06:47,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:47,383 INFO L508 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, 1, 1, 1, 1] [2021-07-13 20:06:47,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:47,589 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash -909171880, now seen corresponding path program 2 times [2021-07-13 20:06:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:47,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167203902] [2021-07-13 20:06:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:47,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167203902] [2021-07-13 20:06:47,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167203902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297338042] [2021-07-13 20:06:47,662 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 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 [2021-07-13 20:06:47,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:06:47,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:47,749 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 7 [2021-07-13 20:06:47,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:47,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2021-07-13 20:06:47,775 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 11 treesize of output 7 [2021-07-13 20:06:47,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:47,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:06:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:47,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297338042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:47,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:06:47,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794370921] [2021-07-13 20:06:47,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:06:47,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:47,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:06:47,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:06:47,806 INFO L87 Difference]: Start difference. First operand 1796 states and 5192 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:47,997 INFO L93 Difference]: Finished difference Result 2323 states and 6719 transitions. [2021-07-13 20:06:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:06:47,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-13 20:06:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:48,008 INFO L225 Difference]: With dead ends: 2323 [2021-07-13 20:06:48,008 INFO L226 Difference]: Without dead ends: 2323 [2021-07-13 20:06:48,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:06:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-07-13 20:06:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1767. [2021-07-13 20:06:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 2.9773499433748585) internal successors, (5258), 1766 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 5258 transitions. [2021-07-13 20:06:48,063 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 5258 transitions. Word has length 38 [2021-07-13 20:06:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:48,063 INFO L482 AbstractCegarLoop]: Abstraction has 1767 states and 5258 transitions. [2021-07-13 20:06:48,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 5258 transitions. [2021-07-13 20:06:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:06:48,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:48,068 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-07-13 20:06:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:48,276 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 147113656, now seen corresponding path program 6 times [2021-07-13 20:06:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993707788] [2021-07-13 20:06:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:48,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:48,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993707788] [2021-07-13 20:06:48,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993707788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:48,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415753030] [2021-07-13 20:06:48,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:48,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:06:48,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:48,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:06:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:48,434 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 11 treesize of output 7 [2021-07-13 20:06:48,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:48,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:48,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:48,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-13 20:06:48,470 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 11 treesize of output 7 [2021-07-13 20:06:48,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:48,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:48,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:48,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:06:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:48,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415753030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:48,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:48,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-07-13 20:06:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652334658] [2021-07-13 20:06:48,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:06:48,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:48,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:06:48,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:06:48,511 INFO L87 Difference]: Start difference. First operand 1767 states and 5258 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:48,651 INFO L93 Difference]: Finished difference Result 1908 states and 5582 transitions. [2021-07-13 20:06:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:06:48,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:06:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:48,660 INFO L225 Difference]: With dead ends: 1908 [2021-07-13 20:06:48,660 INFO L226 Difference]: Without dead ends: 1746 [2021-07-13 20:06:48,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-07-13 20:06:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1746. [2021-07-13 20:06:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 2.9707736389684816) internal successors, (5184), 1745 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5184 transitions. [2021-07-13 20:06:48,706 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5184 transitions. Word has length 39 [2021-07-13 20:06:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:48,706 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5184 transitions. [2021-07-13 20:06:48,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5184 transitions. [2021-07-13 20:06:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:06:48,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:48,711 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:06:48,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:06:48,935 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1317885885, now seen corresponding path program 3 times [2021-07-13 20:06:48,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:48,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157505808] [2021-07-13 20:06:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:49,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:49,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157505808] [2021-07-13 20:06:49,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157505808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:49,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153865342] [2021-07-13 20:06:49,254 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 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 [2021-07-13 20:06:49,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:06:49,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:49,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:06:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:49,442 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 11 treesize of output 7 [2021-07-13 20:06:49,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:49,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:49,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:49,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:06:49,488 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 11 treesize of output 7 [2021-07-13 20:06:49,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:49,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:49,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:49,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:49,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153865342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:49,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:49,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-07-13 20:06:49,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569221079] [2021-07-13 20:06:49,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:49,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:49,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:49,696 INFO L87 Difference]: Start difference. First operand 1746 states and 5184 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:50,692 INFO L93 Difference]: Finished difference Result 2913 states and 8362 transitions. [2021-07-13 20:06:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:06:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:06:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:50,715 INFO L225 Difference]: With dead ends: 2913 [2021-07-13 20:06:50,715 INFO L226 Difference]: Without dead ends: 2791 [2021-07-13 20:06:50,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 862.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:06:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-07-13 20:06:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2156. [2021-07-13 20:06:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 2.917401392111369) internal successors, (6287), 2155 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 6287 transitions. [2021-07-13 20:06:50,776 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 6287 transitions. Word has length 42 [2021-07-13 20:06:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:50,776 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 6287 transitions. [2021-07-13 20:06:50,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 6287 transitions. [2021-07-13 20:06:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:06:50,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:50,781 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:06:50,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 20:06:50,993 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash 618123007, now seen corresponding path program 4 times [2021-07-13 20:06:50,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:50,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463663353] [2021-07-13 20:06:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:51,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:51,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463663353] [2021-07-13 20:06:51,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463663353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:51,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201865413] [2021-07-13 20:06:51,260 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 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 [2021-07-13 20:06:51,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:51,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:06:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:51,415 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 7 [2021-07-13 20:06:51,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:51,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:06:51,458 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 11 treesize of output 7 [2021-07-13 20:06:51,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:51,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:51,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201865413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:51,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:51,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-07-13 20:06:51,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363229984] [2021-07-13 20:06:51,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:51,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:51,603 INFO L87 Difference]: Start difference. First operand 2156 states and 6287 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:52,550 INFO L93 Difference]: Finished difference Result 3306 states and 9422 transitions. [2021-07-13 20:06:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:06:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:06:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:52,562 INFO L225 Difference]: With dead ends: 3306 [2021-07-13 20:06:52,562 INFO L226 Difference]: Without dead ends: 3184 [2021-07-13 20:06:52,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:06:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-07-13 20:06:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2163. [2021-07-13 20:06:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.9167437557816838) internal successors, (6306), 2162 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 6306 transitions. [2021-07-13 20:06:52,639 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 6306 transitions. Word has length 42 [2021-07-13 20:06:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:52,640 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 6306 transitions. [2021-07-13 20:06:52,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 6306 transitions. [2021-07-13 20:06:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:06:52,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:52,646 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:06:52,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:52,861 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -555563273, now seen corresponding path program 5 times [2021-07-13 20:06:52,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:52,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799284125] [2021-07-13 20:06:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:53,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799284125] [2021-07-13 20:06:53,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799284125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417270299] [2021-07-13 20:06:53,140 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 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 [2021-07-13 20:06:53,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:06:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:06:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:53,286 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 11 treesize of output 7 [2021-07-13 20:06:53,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:53,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:53,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:53,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:53,343 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 7 [2021-07-13 20:06:53,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:53,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:53,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:53,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:06:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:53,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417270299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:53,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-13 20:06:53,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185409719] [2021-07-13 20:06:53,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:06:53,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:53,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:06:53,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:06:53,473 INFO L87 Difference]: Start difference. First operand 2163 states and 6306 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-13 20:06:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:54,362 INFO L93 Difference]: Finished difference Result 3526 states and 10025 transitions. [2021-07-13 20:06:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:06:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 42 [2021-07-13 20:06:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:54,370 INFO L225 Difference]: With dead ends: 3526 [2021-07-13 20:06:54,370 INFO L226 Difference]: Without dead ends: 3404 [2021-07-13 20:06:54,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:06:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-07-13 20:06:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2248. [2021-07-13 20:06:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.9087672452158433) internal successors, (6536), 2247 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 6536 transitions. [2021-07-13 20:06:54,435 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 6536 transitions. Word has length 42 [2021-07-13 20:06:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:54,435 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 6536 transitions. [2021-07-13 20:06:54,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-13 20:06:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 6536 transitions. [2021-07-13 20:06:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:06:54,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:54,440 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:06:54,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:54,657 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1547873, now seen corresponding path program 6 times [2021-07-13 20:06:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:54,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216696238] [2021-07-13 20:06:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:54,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216696238] [2021-07-13 20:06:54,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216696238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680289711] [2021-07-13 20:06:54,898 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 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 [2021-07-13 20:06:54,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:06:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:06:54,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:55,074 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 11 treesize of output 7 [2021-07-13 20:06:55,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:55,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:55,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:55,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:06:55,133 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 11 treesize of output 7 [2021-07-13 20:06:55,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:55,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:55,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:55,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680289711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:55,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:55,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:06:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409155460] [2021-07-13 20:06:55,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:55,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:55,301 INFO L87 Difference]: Start difference. First operand 2248 states and 6536 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:06:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:56,361 INFO L93 Difference]: Finished difference Result 3475 states and 9879 transitions. [2021-07-13 20:06:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:06:56,362 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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 42 [2021-07-13 20:06:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:56,370 INFO L225 Difference]: With dead ends: 3475 [2021-07-13 20:06:56,370 INFO L226 Difference]: Without dead ends: 3353 [2021-07-13 20:06:56,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:06:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-07-13 20:06:56,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2272. [2021-07-13 20:06:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.9114927344782036) internal successors, (6612), 2271 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 6612 transitions. [2021-07-13 20:06:56,434 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 6612 transitions. Word has length 42 [2021-07-13 20:06:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:56,435 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 6612 transitions. [2021-07-13 20:06:56,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:06:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 6612 transitions. [2021-07-13 20:06:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:06:56,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:56,440 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:06:56,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:06:56,661 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash 861565211, now seen corresponding path program 7 times [2021-07-13 20:06:56,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:56,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241117215] [2021-07-13 20:06:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:56,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:56,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241117215] [2021-07-13 20:06:56,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241117215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:56,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84068496] [2021-07-13 20:06:56,899 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 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 [2021-07-13 20:06:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:06:56,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:57,022 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 11 treesize of output 7 [2021-07-13 20:06:57,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:57,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:06:57,102 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 11 treesize of output 7 [2021-07-13 20:06:57,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:57,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:57,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84068496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:57,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:06:57,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381825970] [2021-07-13 20:06:57,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:57,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:57,231 INFO L87 Difference]: Start difference. First operand 2272 states and 6612 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:06:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:58,249 INFO L93 Difference]: Finished difference Result 4096 states and 11552 transitions. [2021-07-13 20:06:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:06:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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 42 [2021-07-13 20:06:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:58,260 INFO L225 Difference]: With dead ends: 4096 [2021-07-13 20:06:58,261 INFO L226 Difference]: Without dead ends: 3974 [2021-07-13 20:06:58,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:06:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-07-13 20:06:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 2275. [2021-07-13 20:06:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.9124890061565525) internal successors, (6623), 2274 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6623 transitions. [2021-07-13 20:06:58,327 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6623 transitions. Word has length 42 [2021-07-13 20:06:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:58,327 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6623 transitions. [2021-07-13 20:06:58,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:06:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6623 transitions. [2021-07-13 20:06:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:06:58,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:58,333 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:06:58,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:06:58,549 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash -167554607, now seen corresponding path program 8 times [2021-07-13 20:06:58,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:58,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235804851] [2021-07-13 20:06:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:58,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:58,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235804851] [2021-07-13 20:06:58,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235804851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:58,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887203722] [2021-07-13 20:06:58,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:58,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:58,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:58,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:06:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:58,884 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 11 treesize of output 7 [2021-07-13 20:06:58,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:58,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:58,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:58,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:06:58,980 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 11 treesize of output 7 [2021-07-13 20:06:58,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:58,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:58,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:58,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:59,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887203722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:59,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:59,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:06:59,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443707883] [2021-07-13 20:06:59,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:59,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:59,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:59,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:59,131 INFO L87 Difference]: Start difference. First operand 2275 states and 6623 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:07:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:00,380 INFO L93 Difference]: Finished difference Result 4339 states and 12285 transitions. [2021-07-13 20:07:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:07:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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 42 [2021-07-13 20:07:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:00,391 INFO L225 Difference]: With dead ends: 4339 [2021-07-13 20:07:00,391 INFO L226 Difference]: Without dead ends: 4217 [2021-07-13 20:07:00,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 963.4ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:07:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2021-07-13 20:07:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2311. [2021-07-13 20:07:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 2.9294372294372293) internal successors, (6767), 2310 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 6767 transitions. [2021-07-13 20:07:00,467 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 6767 transitions. Word has length 42 [2021-07-13 20:07:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:00,468 INFO L482 AbstractCegarLoop]: Abstraction has 2311 states and 6767 transitions. [2021-07-13 20:07:00,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:07:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 6767 transitions. [2021-07-13 20:07:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:00,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:00,473 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:00,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:07:00,695 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:00,695 INFO L82 PathProgramCache]: Analyzing trace with hash -874135571, now seen corresponding path program 9 times [2021-07-13 20:07:00,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:00,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132559355] [2021-07-13 20:07:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:00,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132559355] [2021-07-13 20:07:00,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132559355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000569467] [2021-07-13 20:07:00,929 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 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 [2021-07-13 20:07:00,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:07:00,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:01,084 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 7 [2021-07-13 20:07:01,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:01,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:01,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:01,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:07:01,141 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 11 treesize of output 7 [2021-07-13 20:07:01,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:01,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:01,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:01,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:01,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000569467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:01,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:01,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:07:01,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583344911] [2021-07-13 20:07:01,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:07:01,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:07:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:07:01,293 INFO L87 Difference]: Start difference. First operand 2311 states and 6767 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:07:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:02,632 INFO L93 Difference]: Finished difference Result 4522 states and 12854 transitions. [2021-07-13 20:07:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:07:02,632 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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 42 [2021-07-13 20:07:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:02,642 INFO L225 Difference]: With dead ends: 4522 [2021-07-13 20:07:02,642 INFO L226 Difference]: Without dead ends: 4400 [2021-07-13 20:07:02,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 920.8ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:07:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-07-13 20:07:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2330. [2021-07-13 20:07:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 2.9373121511378275) internal successors, (6841), 2329 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 6841 transitions. [2021-07-13 20:07:02,713 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 6841 transitions. Word has length 42 [2021-07-13 20:07:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:02,713 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 6841 transitions. [2021-07-13 20:07:02,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:07:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 6841 transitions. [2021-07-13 20:07:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:02,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:02,719 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:02,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:02,941 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:02,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:02,941 INFO L82 PathProgramCache]: Analyzing trace with hash 719964625, now seen corresponding path program 10 times [2021-07-13 20:07:02,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:02,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360782209] [2021-07-13 20:07:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:03,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:03,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360782209] [2021-07-13 20:07:03,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360782209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498989117] [2021-07-13 20:07:03,227 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 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 [2021-07-13 20:07:03,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:03,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:03,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:03,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:03,358 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 11 treesize of output 7 [2021-07-13 20:07:03,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:03,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:03,414 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 11 treesize of output 7 [2021-07-13 20:07:03,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:03,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498989117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:03,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:07:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506474190] [2021-07-13 20:07:03,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:07:03,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:07:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:07:03,557 INFO L87 Difference]: Start difference. First operand 2330 states and 6841 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:07:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:04,981 INFO L93 Difference]: Finished difference Result 5127 states and 14673 transitions. [2021-07-13 20:07:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:07:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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 42 [2021-07-13 20:07:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:04,990 INFO L225 Difference]: With dead ends: 5127 [2021-07-13 20:07:04,990 INFO L226 Difference]: Without dead ends: 5014 [2021-07-13 20:07:04,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1016.9ms TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:07:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-07-13 20:07:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 2408. [2021-07-13 20:07:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.966348151225592) internal successors, (7140), 2407 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7140 transitions. [2021-07-13 20:07:05,068 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7140 transitions. Word has length 42 [2021-07-13 20:07:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:05,068 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7140 transitions. [2021-07-13 20:07:05,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-07-13 20:07:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7140 transitions. [2021-07-13 20:07:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:05,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:05,074 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:05,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:07:05,289 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:05,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1046835165, now seen corresponding path program 11 times [2021-07-13 20:07:05,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:05,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502845591] [2021-07-13 20:07:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:05,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502845591] [2021-07-13 20:07:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502845591] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:07:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:07:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:07:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635063294] [2021-07-13 20:07:05,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:07:05,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:07:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:07:05,310 INFO L87 Difference]: Start difference. First operand 2408 states and 7140 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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) [2021-07-13 20:07:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:05,333 INFO L93 Difference]: Finished difference Result 5624 states and 16348 transitions. [2021-07-13 20:07:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:07:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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 42 [2021-07-13 20:07:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:05,343 INFO L225 Difference]: With dead ends: 5624 [2021-07-13 20:07:05,343 INFO L226 Difference]: Without dead ends: 5361 [2021-07-13 20:07:05,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:07:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-07-13 20:07:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4595. [2021-07-13 20:07:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4594 states have (on average 2.994122768828907) internal successors, (13755), 4594 states have internal predecessors, (13755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 13755 transitions. [2021-07-13 20:07:05,480 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 13755 transitions. Word has length 42 [2021-07-13 20:07:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:05,480 INFO L482 AbstractCegarLoop]: Abstraction has 4595 states and 13755 transitions. [2021-07-13 20:07:05,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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) [2021-07-13 20:07:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 13755 transitions. [2021-07-13 20:07:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:05,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:05,490 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:05,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-07-13 20:07:05,490 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash -613351201, now seen corresponding path program 12 times [2021-07-13 20:07:05,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:05,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792899404] [2021-07-13 20:07:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:05,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:05,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792899404] [2021-07-13 20:07:05,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792899404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:05,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301262215] [2021-07-13 20:07:05,698 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 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 [2021-07-13 20:07:05,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:07:05,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:07:05,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:05,799 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 7 [2021-07-13 20:07:05,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:05,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:05,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:05,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:07:05,892 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 11 treesize of output 7 [2021-07-13 20:07:05,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:05,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:05,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:05,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:06,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301262215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:06,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:06,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987871809] [2021-07-13 20:07:06,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:06,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:06,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:06,020 INFO L87 Difference]: Start difference. First operand 4595 states and 13755 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:06,997 INFO L93 Difference]: Finished difference Result 5285 states and 15482 transitions. [2021-07-13 20:07:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:07:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:07,007 INFO L225 Difference]: With dead ends: 5285 [2021-07-13 20:07:07,007 INFO L226 Difference]: Without dead ends: 5064 [2021-07-13 20:07:07,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:07:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-07-13 20:07:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4600. [2021-07-13 20:07:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.994998912807132) internal successors, (13774), 4599 states have internal predecessors, (13774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 13774 transitions. [2021-07-13 20:07:07,117 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 13774 transitions. Word has length 42 [2021-07-13 20:07:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:07,117 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 13774 transitions. [2021-07-13 20:07:07,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 13774 transitions. [2021-07-13 20:07:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:07,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:07,128 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:07,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:07,353 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1642471019, now seen corresponding path program 13 times [2021-07-13 20:07:07,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:07,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631668150] [2021-07-13 20:07:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:07,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:07,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631668150] [2021-07-13 20:07:07,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631668150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:07,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240367609] [2021-07-13 20:07:07,553 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 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 [2021-07-13 20:07:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:07,663 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 11 treesize of output 7 [2021-07-13 20:07:07,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:07,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:07,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:07,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:07,748 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 11 treesize of output 7 [2021-07-13 20:07:07,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:07,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:07,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:07,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:07,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240367609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:07,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:07,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:07,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391106579] [2021-07-13 20:07:07,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:07,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:07,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:07,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:07,872 INFO L87 Difference]: Start difference. First operand 4600 states and 13774 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:08,956 INFO L93 Difference]: Finished difference Result 5862 states and 16975 transitions. [2021-07-13 20:07:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:07:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:08,966 INFO L225 Difference]: With dead ends: 5862 [2021-07-13 20:07:08,966 INFO L226 Difference]: Without dead ends: 5641 [2021-07-13 20:07:08,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2021-07-13 20:07:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 4612. [2021-07-13 20:07:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.9969637822598134) internal successors, (13819), 4611 states have internal predecessors, (13819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 13819 transitions. [2021-07-13 20:07:09,061 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 13819 transitions. Word has length 42 [2021-07-13 20:07:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:09,062 INFO L482 AbstractCegarLoop]: Abstraction has 4612 states and 13819 transitions. [2021-07-13 20:07:09,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 13819 transitions. [2021-07-13 20:07:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:09,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:09,072 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:09,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:07:09,285 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1945915313, now seen corresponding path program 14 times [2021-07-13 20:07:09,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:09,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503900331] [2021-07-13 20:07:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:09,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:09,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503900331] [2021-07-13 20:07:09,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503900331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:09,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366413357] [2021-07-13 20:07:09,490 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 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 [2021-07-13 20:07:09,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:09,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:09,633 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 7 [2021-07-13 20:07:09,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:09,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:09,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:09,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:07:09,692 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 11 treesize of output 7 [2021-07-13 20:07:09,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:09,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:09,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:09,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:09,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366413357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:09,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:09,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:09,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975292380] [2021-07-13 20:07:09,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:09,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:09,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:09,843 INFO L87 Difference]: Start difference. First operand 4612 states and 13819 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:10,859 INFO L93 Difference]: Finished difference Result 6189 states and 17997 transitions. [2021-07-13 20:07:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:07:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:10,869 INFO L225 Difference]: With dead ends: 6189 [2021-07-13 20:07:10,869 INFO L226 Difference]: Without dead ends: 5968 [2021-07-13 20:07:10,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 782.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5968 states. [2021-07-13 20:07:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5968 to 4616. [2021-07-13 20:07:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.996749729144095) internal successors, (13830), 4615 states have internal predecessors, (13830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13830 transitions. [2021-07-13 20:07:10,976 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13830 transitions. Word has length 42 [2021-07-13 20:07:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:10,976 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13830 transitions. [2021-07-13 20:07:10,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13830 transitions. [2021-07-13 20:07:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:10,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:10,986 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:11,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:07:11,205 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:11,205 INFO L82 PathProgramCache]: Analyzing trace with hash -754951787, now seen corresponding path program 15 times [2021-07-13 20:07:11,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:11,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545073841] [2021-07-13 20:07:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:11,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:11,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545073841] [2021-07-13 20:07:11,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545073841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:11,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347591900] [2021-07-13 20:07:11,411 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 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 [2021-07-13 20:07:11,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:07:11,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:11,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:11,513 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 7 [2021-07-13 20:07:11,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:11,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:11,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:11,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-07-13 20:07:11,569 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 11 treesize of output 7 [2021-07-13 20:07:11,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:11,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:11,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:11,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:11,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347591900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:11,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:11,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:11,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356190260] [2021-07-13 20:07:11,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:11,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:11,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:11,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:11,738 INFO L87 Difference]: Start difference. First operand 4616 states and 13830 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:13,033 INFO L93 Difference]: Finished difference Result 7088 states and 20488 transitions. [2021-07-13 20:07:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:07:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:13,050 INFO L225 Difference]: With dead ends: 7088 [2021-07-13 20:07:13,050 INFO L226 Difference]: Without dead ends: 6902 [2021-07-13 20:07:13,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 871.3ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6902 states. [2021-07-13 20:07:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6902 to 4597. [2021-07-13 20:07:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2021-07-13 20:07:13,146 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2021-07-13 20:07:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:13,146 INFO L482 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2021-07-13 20:07:13,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2021-07-13 20:07:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:13,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:13,157 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:13,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:07:13,381 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1290780253, now seen corresponding path program 16 times [2021-07-13 20:07:13,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:13,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114898612] [2021-07-13 20:07:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:13,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:13,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114898612] [2021-07-13 20:07:13,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114898612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616348429] [2021-07-13 20:07:13,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:13,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:13,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:13,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:13,667 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 11 treesize of output 7 [2021-07-13 20:07:13,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:13,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:13,727 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 11 treesize of output 7 [2021-07-13 20:07:13,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:13,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:13,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616348429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:13,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-13 20:07:13,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964982841] [2021-07-13 20:07:13,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:07:13,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:13,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:07:13,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:13,842 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:14,667 INFO L93 Difference]: Finished difference Result 5261 states and 15418 transitions. [2021-07-13 20:07:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:07:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:14,676 INFO L225 Difference]: With dead ends: 5261 [2021-07-13 20:07:14,676 INFO L226 Difference]: Without dead ends: 5040 [2021-07-13 20:07:14,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 684.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:07:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-07-13 20:07:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 4604. [2021-07-13 20:07:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4603 states have (on average 2.9941342602650445) internal successors, (13782), 4603 states have internal predecessors, (13782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 13782 transitions. [2021-07-13 20:07:14,752 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 13782 transitions. Word has length 42 [2021-07-13 20:07:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:14,752 INFO L482 AbstractCegarLoop]: Abstraction has 4604 states and 13782 transitions. [2021-07-13 20:07:14,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 13782 transitions. [2021-07-13 20:07:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:14,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:14,762 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:14,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:07:14,962 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1779735983, now seen corresponding path program 17 times [2021-07-13 20:07:14,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:14,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967868772] [2021-07-13 20:07:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:15,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:15,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967868772] [2021-07-13 20:07:15,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967868772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629060200] [2021-07-13 20:07:15,154 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 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 [2021-07-13 20:07:15,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:07:15,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:15,260 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 7 [2021-07-13 20:07:15,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:15,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:07:15,318 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 7 [2021-07-13 20:07:15,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:15,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-07-13 20:07:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:15,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629060200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:15,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-13 20:07:15,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409018236] [2021-07-13 20:07:15,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:07:15,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:15,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:07:15,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:15,457 INFO L87 Difference]: Start difference. First operand 4604 states and 13782 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-13 20:07:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:16,320 INFO L93 Difference]: Finished difference Result 5518 states and 16059 transitions. [2021-07-13 20:07:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:07:16,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 42 [2021-07-13 20:07:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:16,329 INFO L225 Difference]: With dead ends: 5518 [2021-07-13 20:07:16,329 INFO L226 Difference]: Without dead ends: 5297 [2021-07-13 20:07:16,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:07:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2021-07-13 20:07:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 4597. [2021-07-13 20:07:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2021-07-13 20:07:16,404 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2021-07-13 20:07:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:16,404 INFO L482 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2021-07-13 20:07:16,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-13 20:07:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2021-07-13 20:07:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:16,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:16,414 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:16,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:07:16,626 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1601681763, now seen corresponding path program 18 times [2021-07-13 20:07:16,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:16,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086140752] [2021-07-13 20:07:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:16,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:16,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086140752] [2021-07-13 20:07:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086140752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662953967] [2021-07-13 20:07:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:16,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:07:16,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:16,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:16,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:16,935 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 11 treesize of output 7 [2021-07-13 20:07:16,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:16,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:17,008 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 11 treesize of output 7 [2021-07-13 20:07:17,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:17,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:17,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:17,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:17,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662953967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:17,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:17,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711515866] [2021-07-13 20:07:17,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:17,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:17,134 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:18,271 INFO L93 Difference]: Finished difference Result 6016 states and 17495 transitions. [2021-07-13 20:07:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:07:18,272 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:18,282 INFO L225 Difference]: With dead ends: 6016 [2021-07-13 20:07:18,282 INFO L226 Difference]: Without dead ends: 5795 [2021-07-13 20:07:18,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2021-07-13 20:07:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 4617. [2021-07-13 20:07:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.997833622183709) internal successors, (13838), 4616 states have internal predecessors, (13838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13838 transitions. [2021-07-13 20:07:18,378 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13838 transitions. Word has length 42 [2021-07-13 20:07:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:18,379 INFO L482 AbstractCegarLoop]: Abstraction has 4617 states and 13838 transitions. [2021-07-13 20:07:18,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13838 transitions. [2021-07-13 20:07:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:18,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:18,385 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:18,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:18,586 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1986704569, now seen corresponding path program 19 times [2021-07-13 20:07:18,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:18,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736966677] [2021-07-13 20:07:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:18,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736966677] [2021-07-13 20:07:18,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736966677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338832794] [2021-07-13 20:07:18,778 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 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 [2021-07-13 20:07:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:18,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:18,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:18,870 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 11 treesize of output 7 [2021-07-13 20:07:18,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:18,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:18,920 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 11 treesize of output 7 [2021-07-13 20:07:18,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:18,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:18,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:19,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338832794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:19,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:19,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84443775] [2021-07-13 20:07:19,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:19,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:19,069 INFO L87 Difference]: Start difference. First operand 4617 states and 13838 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:20,156 INFO L93 Difference]: Finished difference Result 6525 states and 18951 transitions. [2021-07-13 20:07:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:07:20,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:20,167 INFO L225 Difference]: With dead ends: 6525 [2021-07-13 20:07:20,167 INFO L226 Difference]: Without dead ends: 6304 [2021-07-13 20:07:20,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 783.5ms TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-07-13 20:07:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 4621. [2021-07-13 20:07:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 2.9976190476190476) internal successors, (13849), 4620 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 13849 transitions. [2021-07-13 20:07:20,270 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 13849 transitions. Word has length 42 [2021-07-13 20:07:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:20,271 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 13849 transitions. [2021-07-13 20:07:20,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 13849 transitions. [2021-07-13 20:07:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:20,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:20,280 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:20,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:07:20,483 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash -714162531, now seen corresponding path program 20 times [2021-07-13 20:07:20,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:20,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92383784] [2021-07-13 20:07:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:20,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:20,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92383784] [2021-07-13 20:07:20,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92383784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:20,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479898621] [2021-07-13 20:07:20,716 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 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 [2021-07-13 20:07:20,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:20,859 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 7 [2021-07-13 20:07:20,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:20,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:20,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:20,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-07-13 20:07:20,922 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 11 treesize of output 7 [2021-07-13 20:07:20,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:20,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:20,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:20,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:21,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479898621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:21,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:21,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:21,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186720981] [2021-07-13 20:07:21,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:21,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:21,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:21,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:21,095 INFO L87 Difference]: Start difference. First operand 4621 states and 13849 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:22,357 INFO L93 Difference]: Finished difference Result 7424 states and 21442 transitions. [2021-07-13 20:07:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:07:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:22,392 INFO L225 Difference]: With dead ends: 7424 [2021-07-13 20:07:22,393 INFO L226 Difference]: Without dead ends: 7238 [2021-07-13 20:07:22,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 889.0ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-07-13 20:07:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 4605. [2021-07-13 20:07:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2021-07-13 20:07:22,480 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2021-07-13 20:07:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:22,480 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2021-07-13 20:07:22,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2021-07-13 20:07:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:22,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:22,486 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:22,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:22,687 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:22,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1369235807, now seen corresponding path program 21 times [2021-07-13 20:07:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:22,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221173813] [2021-07-13 20:07:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:22,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221173813] [2021-07-13 20:07:22,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221173813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347662272] [2021-07-13 20:07:22,899 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 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 [2021-07-13 20:07:22,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:07:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:07:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:23,012 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 11 treesize of output 7 [2021-07-13 20:07:23,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:23,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:23,087 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 11 treesize of output 7 [2021-07-13 20:07:23,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:23,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:23,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347662272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:23,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:07:23,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277651254] [2021-07-13 20:07:23,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:07:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:23,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:07:23,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:07:23,226 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:24,270 INFO L93 Difference]: Finished difference Result 5827 states and 16946 transitions. [2021-07-13 20:07:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:07:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 42 [2021-07-13 20:07:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:24,280 INFO L225 Difference]: With dead ends: 5827 [2021-07-13 20:07:24,280 INFO L226 Difference]: Without dead ends: 5606 [2021-07-13 20:07:24,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:07:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2021-07-13 20:07:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 4605. [2021-07-13 20:07:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2021-07-13 20:07:24,378 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2021-07-13 20:07:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:24,378 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2021-07-13 20:07:24,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2021-07-13 20:07:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2021-07-13 20:07:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:24,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:24,384 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:24,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:07:24,585 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1539781409, now seen corresponding path program 22 times [2021-07-13 20:07:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:24,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437692016] [2021-07-13 20:07:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:24,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437692016] [2021-07-13 20:07:24,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437692016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530962705] [2021-07-13 20:07:24,794 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 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 [2021-07-13 20:07:24,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:24,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:24,924 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 11 treesize of output 7 [2021-07-13 20:07:24,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:24,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:24,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:24,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:07:25,045 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 11 treesize of output 7 [2021-07-13 20:07:25,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:25,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:25,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530962705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:25,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:25,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:25,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685624782] [2021-07-13 20:07:25,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:25,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:25,185 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:26,072 INFO L93 Difference]: Finished difference Result 5154 states and 15161 transitions. [2021-07-13 20:07:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:07:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:26,081 INFO L225 Difference]: With dead ends: 5154 [2021-07-13 20:07:26,081 INFO L226 Difference]: Without dead ends: 4933 [2021-07-13 20:07:26,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 787.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:07:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-07-13 20:07:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4611. [2021-07-13 20:07:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 2.996095444685466) internal successors, (13812), 4610 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 13812 transitions. [2021-07-13 20:07:26,190 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 13812 transitions. Word has length 42 [2021-07-13 20:07:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:26,190 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 13812 transitions. [2021-07-13 20:07:26,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 13812 transitions. [2021-07-13 20:07:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:26,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:26,196 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:26,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:26,397 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash 510661591, now seen corresponding path program 23 times [2021-07-13 20:07:26,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:26,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777179352] [2021-07-13 20:07:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:26,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:26,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777179352] [2021-07-13 20:07:26,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777179352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412774884] [2021-07-13 20:07:26,619 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 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 [2021-07-13 20:07:26,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:26,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:26,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:07:26,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:26,756 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 11 treesize of output 7 [2021-07-13 20:07:26,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:26,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:07:26,891 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 11 treesize of output 7 [2021-07-13 20:07:26,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:26,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:26,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:27,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412774884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:27,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:27,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:07:27,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820914913] [2021-07-13 20:07:27,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:27,091 INFO L87 Difference]: Start difference. First operand 4611 states and 13812 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:28,154 INFO L93 Difference]: Finished difference Result 5518 states and 16071 transitions. [2021-07-13 20:07:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:07:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:28,164 INFO L225 Difference]: With dead ends: 5518 [2021-07-13 20:07:28,164 INFO L226 Difference]: Without dead ends: 5297 [2021-07-13 20:07:28,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1000.8ms TimeCoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:07:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2021-07-13 20:07:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 4623. [2021-07-13 20:07:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 2.998052790999567) internal successors, (13857), 4622 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 13857 transitions. [2021-07-13 20:07:28,250 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 13857 transitions. Word has length 42 [2021-07-13 20:07:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:28,250 INFO L482 AbstractCegarLoop]: Abstraction has 4623 states and 13857 transitions. [2021-07-13 20:07:28,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 13857 transitions. [2021-07-13 20:07:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:28,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:28,259 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:28,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:07:28,483 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash -195919373, now seen corresponding path program 24 times [2021-07-13 20:07:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:28,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373963565] [2021-07-13 20:07:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:28,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:28,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373963565] [2021-07-13 20:07:28,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373963565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:28,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429998648] [2021-07-13 20:07:28,694 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 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 [2021-07-13 20:07:28,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:07:28,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:28,833 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 7 [2021-07-13 20:07:28,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:28,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:07:28,934 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 11 treesize of output 7 [2021-07-13 20:07:28,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:28,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:29,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429998648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:29,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:29,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:29,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394480913] [2021-07-13 20:07:29,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:29,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:29,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:29,105 INFO L87 Difference]: Start difference. First operand 4623 states and 13857 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:30,161 INFO L93 Difference]: Finished difference Result 5689 states and 16671 transitions. [2021-07-13 20:07:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:07:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:30,173 INFO L225 Difference]: With dead ends: 5689 [2021-07-13 20:07:30,173 INFO L226 Difference]: Without dead ends: 5468 [2021-07-13 20:07:30,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 918.1ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2021-07-13 20:07:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 4627. [2021-07-13 20:07:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.9978383052313013) internal successors, (13868), 4626 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13868 transitions. [2021-07-13 20:07:30,291 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13868 transitions. Word has length 42 [2021-07-13 20:07:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:30,291 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13868 transitions. [2021-07-13 20:07:30,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13868 transitions. [2021-07-13 20:07:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:30,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:30,298 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:30,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:30,499 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1398180823, now seen corresponding path program 25 times [2021-07-13 20:07:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:30,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645098743] [2021-07-13 20:07:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:30,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:30,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645098743] [2021-07-13 20:07:30,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645098743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434787267] [2021-07-13 20:07:30,714 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 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 [2021-07-13 20:07:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:30,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:30,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:30,855 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 11 treesize of output 7 [2021-07-13 20:07:30,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:30,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:07:30,957 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 11 treesize of output 7 [2021-07-13 20:07:30,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:30,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:31,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434787267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:31,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:31,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:31,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22761887] [2021-07-13 20:07:31,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:31,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:31,134 INFO L87 Difference]: Start difference. First operand 4627 states and 13868 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:32,339 INFO L93 Difference]: Finished difference Result 6127 states and 17962 transitions. [2021-07-13 20:07:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:07:32,339 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:32,349 INFO L225 Difference]: With dead ends: 6127 [2021-07-13 20:07:32,349 INFO L226 Difference]: Without dead ends: 5941 [2021-07-13 20:07:32,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 948.3ms TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:07:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-07-13 20:07:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 4608. [2021-07-13 20:07:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 2.9956587801172128) internal successors, (13801), 4607 states have internal predecessors, (13801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 13801 transitions. [2021-07-13 20:07:32,426 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 13801 transitions. Word has length 42 [2021-07-13 20:07:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:32,427 INFO L482 AbstractCegarLoop]: Abstraction has 4608 states and 13801 transitions. [2021-07-13 20:07:32,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 13801 transitions. [2021-07-13 20:07:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:32,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:32,434 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:32,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:07:32,635 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -262778015, now seen corresponding path program 26 times [2021-07-13 20:07:32,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:32,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4331656] [2021-07-13 20:07:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:32,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:32,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4331656] [2021-07-13 20:07:32,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4331656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:32,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483266479] [2021-07-13 20:07:32,897 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 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 [2021-07-13 20:07:32,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:32,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:33,035 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 7 [2021-07-13 20:07:33,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:33,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:33,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:33,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:07:33,104 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 11 treesize of output 7 [2021-07-13 20:07:33,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:33,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:33,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:33,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:33,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483266479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:33,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:33,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847129057] [2021-07-13 20:07:33,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:33,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:33,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:33,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:33,288 INFO L87 Difference]: Start difference. First operand 4608 states and 13801 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:34,202 INFO L93 Difference]: Finished difference Result 5246 states and 15565 transitions. [2021-07-13 20:07:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:07:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:34,210 INFO L225 Difference]: With dead ends: 5246 [2021-07-13 20:07:34,210 INFO L226 Difference]: Without dead ends: 5025 [2021-07-13 20:07:34,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:07:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2021-07-13 20:07:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4628. [2021-07-13 20:07:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.99459693105684) internal successors, (13856), 4627 states have internal predecessors, (13856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13856 transitions. [2021-07-13 20:07:34,279 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13856 transitions. Word has length 42 [2021-07-13 20:07:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:34,279 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13856 transitions. [2021-07-13 20:07:34,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13856 transitions. [2021-07-13 20:07:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:34,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:34,287 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:34,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:34,501 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1331322181, now seen corresponding path program 27 times [2021-07-13 20:07:34,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:34,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288203388] [2021-07-13 20:07:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:34,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:34,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288203388] [2021-07-13 20:07:34,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288203388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213006953] [2021-07-13 20:07:34,702 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 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 [2021-07-13 20:07:34,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:07:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:34,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:34,839 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 7 [2021-07-13 20:07:34,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:34,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-07-13 20:07:34,900 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 11 treesize of output 7 [2021-07-13 20:07:34,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:34,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:35,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213006953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:35,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:35,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:35,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884528195] [2021-07-13 20:07:35,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:35,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:35,097 INFO L87 Difference]: Start difference. First operand 4628 states and 13856 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:35,985 INFO L93 Difference]: Finished difference Result 5612 states and 16671 transitions. [2021-07-13 20:07:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:07:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:35,996 INFO L225 Difference]: With dead ends: 5612 [2021-07-13 20:07:35,996 INFO L226 Difference]: Without dead ends: 5426 [2021-07-13 20:07:35,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:07:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-07-13 20:07:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4624. [2021-07-13 20:07:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4623 states have (on average 2.9948085658663204) internal successors, (13845), 4623 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 13845 transitions. [2021-07-13 20:07:36,096 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 13845 transitions. Word has length 42 [2021-07-13 20:07:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:36,096 INFO L482 AbstractCegarLoop]: Abstraction has 4624 states and 13845 transitions. [2021-07-13 20:07:36,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 13845 transitions. [2021-07-13 20:07:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:36,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:36,104 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:36,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:07:36,314 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1483487933, now seen corresponding path program 28 times [2021-07-13 20:07:36,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:36,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408845746] [2021-07-13 20:07:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:36,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:36,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408845746] [2021-07-13 20:07:36,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408845746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:36,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761538983] [2021-07-13 20:07:36,523 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 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 [2021-07-13 20:07:36,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:36,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:36,662 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 11 treesize of output 7 [2021-07-13 20:07:36,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:36,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:07:36,721 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 11 treesize of output 7 [2021-07-13 20:07:36,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:36,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:36,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761538983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:36,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:36,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:36,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389299678] [2021-07-13 20:07:36,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:36,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:36,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:36,898 INFO L87 Difference]: Start difference. First operand 4624 states and 13845 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:37,752 INFO L93 Difference]: Finished difference Result 5503 states and 16361 transitions. [2021-07-13 20:07:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:07:37,752 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:37,762 INFO L225 Difference]: With dead ends: 5503 [2021-07-13 20:07:37,762 INFO L226 Difference]: Without dead ends: 5317 [2021-07-13 20:07:37,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:07:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5317 states. [2021-07-13 20:07:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5317 to 4636. [2021-07-13 20:07:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-07-13 20:07:37,843 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-07-13 20:07:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:37,843 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-07-13 20:07:37,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-07-13 20:07:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:37,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:37,851 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:38,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:07:38,065 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash -630208313, now seen corresponding path program 29 times [2021-07-13 20:07:38,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:38,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48175601] [2021-07-13 20:07:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:38,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:38,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48175601] [2021-07-13 20:07:38,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48175601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998352876] [2021-07-13 20:07:38,306 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 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 [2021-07-13 20:07:38,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:38,428 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 7 [2021-07-13 20:07:38,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:38,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:07:38,542 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 11 treesize of output 7 [2021-07-13 20:07:38,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:38,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:38,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998352876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:38,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:07:38,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20628830] [2021-07-13 20:07:38,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:38,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:38,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:38,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:38,726 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:39,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:39,797 INFO L93 Difference]: Finished difference Result 5218 states and 15352 transitions. [2021-07-13 20:07:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:07:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:39,806 INFO L225 Difference]: With dead ends: 5218 [2021-07-13 20:07:39,806 INFO L226 Difference]: Without dead ends: 4997 [2021-07-13 20:07:39,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 968.4ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:07:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2021-07-13 20:07:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 4648. [2021-07-13 20:07:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 2.9952657628577577) internal successors, (13919), 4647 states have internal predecessors, (13919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 13919 transitions. [2021-07-13 20:07:39,895 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 13919 transitions. Word has length 42 [2021-07-13 20:07:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:39,895 INFO L482 AbstractCegarLoop]: Abstraction has 4648 states and 13919 transitions. [2021-07-13 20:07:39,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 13919 transitions. [2021-07-13 20:07:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:39,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:39,902 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:40,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:07:40,103 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:40,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1336789277, now seen corresponding path program 30 times [2021-07-13 20:07:40,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:40,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258711465] [2021-07-13 20:07:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:40,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258711465] [2021-07-13 20:07:40,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258711465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167634981] [2021-07-13 20:07:40,335 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 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 [2021-07-13 20:07:40,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:07:40,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:40,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:40,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:40,475 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 7 [2021-07-13 20:07:40,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:40,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:07:40,561 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 11 treesize of output 7 [2021-07-13 20:07:40,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:40,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167634981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:40,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:40,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823053932] [2021-07-13 20:07:40,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:40,732 INFO L87 Difference]: Start difference. First operand 4648 states and 13919 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:41,765 INFO L93 Difference]: Finished difference Result 5672 states and 16626 transitions. [2021-07-13 20:07:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:07:41,765 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:41,775 INFO L225 Difference]: With dead ends: 5672 [2021-07-13 20:07:41,775 INFO L226 Difference]: Without dead ends: 5451 [2021-07-13 20:07:41,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 888.4ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-07-13 20:07:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4652. [2021-07-13 20:07:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9950548269189423) internal successors, (13930), 4651 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13930 transitions. [2021-07-13 20:07:41,864 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13930 transitions. Word has length 42 [2021-07-13 20:07:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:41,864 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 13930 transitions. [2021-07-13 20:07:41,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13930 transitions. [2021-07-13 20:07:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:41,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:41,870 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:42,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:07:42,076 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 257310919, now seen corresponding path program 31 times [2021-07-13 20:07:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:42,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513625203] [2021-07-13 20:07:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:42,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:42,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513625203] [2021-07-13 20:07:42,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513625203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816056103] [2021-07-13 20:07:42,290 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 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 [2021-07-13 20:07:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:42,413 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 11 treesize of output 7 [2021-07-13 20:07:42,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:42,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:07:42,498 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 11 treesize of output 7 [2021-07-13 20:07:42,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:42,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:42,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816056103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:42,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496035031] [2021-07-13 20:07:42,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:42,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:42,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:42,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:42,637 INFO L87 Difference]: Start difference. First operand 4652 states and 13930 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:43,860 INFO L93 Difference]: Finished difference Result 6058 states and 17770 transitions. [2021-07-13 20:07:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:07:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:43,874 INFO L225 Difference]: With dead ends: 6058 [2021-07-13 20:07:43,874 INFO L226 Difference]: Without dead ends: 5872 [2021-07-13 20:07:43,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 932.3ms TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:07:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-07-13 20:07:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 4636. [2021-07-13 20:07:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-07-13 20:07:43,958 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-07-13 20:07:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:43,958 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-07-13 20:07:43,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-07-13 20:07:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:43,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:43,964 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:44,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:07:44,165 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1232954403, now seen corresponding path program 32 times [2021-07-13 20:07:44,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:44,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285676902] [2021-07-13 20:07:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:44,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285676902] [2021-07-13 20:07:44,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285676902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844780300] [2021-07-13 20:07:44,354 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 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 [2021-07-13 20:07:44,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:44,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:07:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:44,442 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 7 [2021-07-13 20:07:44,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:44,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:44,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:44,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:07:44,593 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 11 treesize of output 7 [2021-07-13 20:07:44,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:44,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:44,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:44,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:44,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844780300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:44,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:44,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15532071] [2021-07-13 20:07:44,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:44,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:44,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:44,716 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:45,541 INFO L93 Difference]: Finished difference Result 5185 states and 15242 transitions. [2021-07-13 20:07:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:07:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:45,550 INFO L225 Difference]: With dead ends: 5185 [2021-07-13 20:07:45,550 INFO L226 Difference]: Without dead ends: 4964 [2021-07-13 20:07:45,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 727.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:07:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2021-07-13 20:07:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 4642. [2021-07-13 20:07:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 2.993535875888817) internal successors, (13893), 4641 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 13893 transitions. [2021-07-13 20:07:45,639 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 13893 transitions. Word has length 42 [2021-07-13 20:07:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:45,639 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 13893 transitions. [2021-07-13 20:07:45,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 13893 transitions. [2021-07-13 20:07:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:45,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:45,646 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:45,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:07:45,849 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2032893075, now seen corresponding path program 33 times [2021-07-13 20:07:45,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:45,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593054356] [2021-07-13 20:07:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:46,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593054356] [2021-07-13 20:07:46,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593054356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344604295] [2021-07-13 20:07:46,076 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 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 [2021-07-13 20:07:46,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:07:46,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:46,191 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 11 treesize of output 7 [2021-07-13 20:07:46,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:46,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:46,335 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 11 treesize of output 7 [2021-07-13 20:07:46,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:46,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:46,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344604295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:46,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:46,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88381973] [2021-07-13 20:07:46,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:46,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:46,483 INFO L87 Difference]: Start difference. First operand 4642 states and 13893 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:47,719 INFO L93 Difference]: Finished difference Result 5549 states and 16152 transitions. [2021-07-13 20:07:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:07:47,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:47,727 INFO L225 Difference]: With dead ends: 5549 [2021-07-13 20:07:47,727 INFO L226 Difference]: Without dead ends: 5328 [2021-07-13 20:07:47,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 886.9ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-07-13 20:07:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4654. [2021-07-13 20:07:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4653 states have (on average 2.995486782720825) internal successors, (13938), 4653 states have internal predecessors, (13938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 13938 transitions. [2021-07-13 20:07:47,788 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 13938 transitions. Word has length 42 [2021-07-13 20:07:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:47,789 INFO L482 AbstractCegarLoop]: Abstraction has 4654 states and 13938 transitions. [2021-07-13 20:07:47,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 13938 transitions. [2021-07-13 20:07:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:47,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:47,795 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:47,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 20:07:47,995 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:47,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1326312111, now seen corresponding path program 34 times [2021-07-13 20:07:47,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:47,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201677288] [2021-07-13 20:07:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:48,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:48,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201677288] [2021-07-13 20:07:48,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201677288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509696530] [2021-07-13 20:07:48,187 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 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 [2021-07-13 20:07:48,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:48,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:48,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:48,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:48,294 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 11 treesize of output 7 [2021-07-13 20:07:48,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:48,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:48,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:48,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:48,392 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 11 treesize of output 7 [2021-07-13 20:07:48,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:48,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:48,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:48,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:48,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509696530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:48,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:48,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18424377] [2021-07-13 20:07:48,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:48,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:48,552 INFO L87 Difference]: Start difference. First operand 4654 states and 13938 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:49,585 INFO L93 Difference]: Finished difference Result 5720 states and 16752 transitions. [2021-07-13 20:07:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:07:49,586 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:49,594 INFO L225 Difference]: With dead ends: 5720 [2021-07-13 20:07:49,594 INFO L226 Difference]: Without dead ends: 5499 [2021-07-13 20:07:49,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 841.0ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2021-07-13 20:07:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 4658. [2021-07-13 20:07:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.9952759287094697) internal successors, (13949), 4657 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 13949 transitions. [2021-07-13 20:07:49,662 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 13949 transitions. Word has length 42 [2021-07-13 20:07:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:49,662 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 13949 transitions. [2021-07-13 20:07:49,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 13949 transitions. [2021-07-13 20:07:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:49,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:49,669 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:49,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:49,873 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1374554989, now seen corresponding path program 35 times [2021-07-13 20:07:49,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:49,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138046314] [2021-07-13 20:07:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:50,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138046314] [2021-07-13 20:07:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138046314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766151869] [2021-07-13 20:07:50,084 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 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 [2021-07-13 20:07:50,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:50,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:50,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:50,196 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 7 [2021-07-13 20:07:50,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:50,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:50,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:50,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:07:50,306 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 11 treesize of output 7 [2021-07-13 20:07:50,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:50,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:50,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:50,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766151869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:50,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:50,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:07:50,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209577484] [2021-07-13 20:07:50,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:50,487 INFO L87 Difference]: Start difference. First operand 4658 states and 13949 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:51,926 INFO L93 Difference]: Finished difference Result 6225 states and 18189 transitions. [2021-07-13 20:07:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:07:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:51,936 INFO L225 Difference]: With dead ends: 6225 [2021-07-13 20:07:51,936 INFO L226 Difference]: Without dead ends: 5937 [2021-07-13 20:07:51,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 983.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:07:51,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5937 states. [2021-07-13 20:07:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5937 to 4639. [2021-07-13 20:07:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.993100474342389) internal successors, (13882), 4638 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13882 transitions. [2021-07-13 20:07:52,005 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13882 transitions. Word has length 42 [2021-07-13 20:07:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:52,006 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13882 transitions. [2021-07-13 20:07:52,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13882 transitions. [2021-07-13 20:07:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:52,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:52,012 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:52,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:52,213 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:52,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1259453469, now seen corresponding path program 36 times [2021-07-13 20:07:52,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:52,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752878498] [2021-07-13 20:07:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:52,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752878498] [2021-07-13 20:07:52,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752878498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:52,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237799745] [2021-07-13 20:07:52,434 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 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 [2021-07-13 20:07:52,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:07:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:52,541 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 7 [2021-07-13 20:07:52,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:52,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:52,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:52,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:07:52,624 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 11 treesize of output 7 [2021-07-13 20:07:52,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:52,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:52,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:52,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:52,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237799745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:52,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:52,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:52,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513757331] [2021-07-13 20:07:52,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:52,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:52,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:52,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:52,791 INFO L87 Difference]: Start difference. First operand 4639 states and 13882 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:53,575 INFO L93 Difference]: Finished difference Result 5277 states and 15646 transitions. [2021-07-13 20:07:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:07:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:53,584 INFO L225 Difference]: With dead ends: 5277 [2021-07-13 20:07:53,584 INFO L226 Difference]: Without dead ends: 5056 [2021-07-13 20:07:53,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 781.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:07:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-07-13 20:07:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4659. [2021-07-13 20:07:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.9920566766852725) internal successors, (13937), 4658 states have internal predecessors, (13937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 13937 transitions. [2021-07-13 20:07:53,656 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 13937 transitions. Word has length 42 [2021-07-13 20:07:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:53,656 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 13937 transitions. [2021-07-13 20:07:53,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 13937 transitions. [2021-07-13 20:07:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:53,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:53,663 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:53,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:53,864 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1441413631, now seen corresponding path program 37 times [2021-07-13 20:07:53,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:53,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341452679] [2021-07-13 20:07:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:54,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:54,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341452679] [2021-07-13 20:07:54,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341452679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:54,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700717166] [2021-07-13 20:07:54,075 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 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 [2021-07-13 20:07:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:54,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:54,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:54,185 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 11 treesize of output 7 [2021-07-13 20:07:54,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:54,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:54,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:54,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:54,268 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 11 treesize of output 7 [2021-07-13 20:07:54,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:54,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:54,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:54,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:54,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700717166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:54,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:54,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:54,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601578015] [2021-07-13 20:07:54,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:54,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:54,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:54,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:54,454 INFO L87 Difference]: Start difference. First operand 4659 states and 13937 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:55,433 INFO L93 Difference]: Finished difference Result 5643 states and 16752 transitions. [2021-07-13 20:07:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:07:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:55,442 INFO L225 Difference]: With dead ends: 5643 [2021-07-13 20:07:55,442 INFO L226 Difference]: Without dead ends: 5457 [2021-07-13 20:07:55,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:07:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2021-07-13 20:07:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 4655. [2021-07-13 20:07:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.9922647185217017) internal successors, (13926), 4654 states have internal predecessors, (13926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13926 transitions. [2021-07-13 20:07:55,509 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13926 transitions. Word has length 42 [2021-07-13 20:07:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:55,509 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13926 transitions. [2021-07-13 20:07:55,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13926 transitions. [2021-07-13 20:07:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:55,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:55,516 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:55,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:07:55,717 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:55,717 INFO L82 PathProgramCache]: Analyzing trace with hash 38743551, now seen corresponding path program 38 times [2021-07-13 20:07:55,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:55,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765119570] [2021-07-13 20:07:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:55,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:55,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765119570] [2021-07-13 20:07:55,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765119570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:55,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935058629] [2021-07-13 20:07:55,941 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 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 [2021-07-13 20:07:55,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:55,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:56,044 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 7 [2021-07-13 20:07:56,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:56,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:07:56,118 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 11 treesize of output 7 [2021-07-13 20:07:56,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:56,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:56,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935058629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:56,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457033950] [2021-07-13 20:07:56,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:56,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:56,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:56,288 INFO L87 Difference]: Start difference. First operand 4655 states and 13926 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:57,197 INFO L93 Difference]: Finished difference Result 5534 states and 16442 transitions. [2021-07-13 20:07:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:07:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:57,207 INFO L225 Difference]: With dead ends: 5534 [2021-07-13 20:07:57,207 INFO L226 Difference]: Without dead ends: 5348 [2021-07-13 20:07:57,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 768.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:07:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2021-07-13 20:07:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4651. [2021-07-13 20:07:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.99247311827957) internal successors, (13915), 4650 states have internal predecessors, (13915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13915 transitions. [2021-07-13 20:07:57,297 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13915 transitions. Word has length 42 [2021-07-13 20:07:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:57,297 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13915 transitions. [2021-07-13 20:07:57,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13915 transitions. [2021-07-13 20:07:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:57,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:57,303 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:57,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:57,504 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash 892023171, now seen corresponding path program 39 times [2021-07-13 20:07:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:57,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699616284] [2021-07-13 20:07:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:57,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:57,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699616284] [2021-07-13 20:07:57,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699616284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:57,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865827325] [2021-07-13 20:07:57,705 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 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 [2021-07-13 20:07:57,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:07:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:57,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:57,807 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 11 treesize of output 7 [2021-07-13 20:07:57,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:57,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:57,955 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 11 treesize of output 7 [2021-07-13 20:07:57,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:57,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:07:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:07:58,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865827325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:58,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:58,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:07:58,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339902988] [2021-07-13 20:07:58,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:58,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:58,081 INFO L87 Difference]: Start difference. First operand 4651 states and 13915 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:59,151 INFO L93 Difference]: Finished difference Result 5233 states and 15393 transitions. [2021-07-13 20:07:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:07:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:07:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:59,159 INFO L225 Difference]: With dead ends: 5233 [2021-07-13 20:07:59,160 INFO L226 Difference]: Without dead ends: 5012 [2021-07-13 20:07:59,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-07-13 20:07:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4663. [2021-07-13 20:07:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.9944229944229943) internal successors, (13960), 4662 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13960 transitions. [2021-07-13 20:07:59,225 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13960 transitions. Word has length 42 [2021-07-13 20:07:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:59,225 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13960 transitions. [2021-07-13 20:07:59,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13960 transitions. [2021-07-13 20:07:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:07:59,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:59,231 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:07:59,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:59,436 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash 185442207, now seen corresponding path program 40 times [2021-07-13 20:07:59,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:59,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065872129] [2021-07-13 20:07:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:59,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065872129] [2021-07-13 20:07:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065872129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768750994] [2021-07-13 20:07:59,644 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 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 [2021-07-13 20:07:59,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:07:59,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:59,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:59,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:59,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:59,879 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 11 treesize of output 7 [2021-07-13 20:07:59,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:59,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:59,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:59,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:00,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768750994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:00,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:00,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065384143] [2021-07-13 20:08:00,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:00,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:00,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:00,041 INFO L87 Difference]: Start difference. First operand 4663 states and 13960 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:01,087 INFO L93 Difference]: Finished difference Result 5695 states and 16689 transitions. [2021-07-13 20:08:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:08:01,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:01,096 INFO L225 Difference]: With dead ends: 5695 [2021-07-13 20:08:01,096 INFO L226 Difference]: Without dead ends: 5474 [2021-07-13 20:08:01,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 879.1ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:08:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2021-07-13 20:08:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 4667. [2021-07-13 20:08:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.994213459065581) internal successors, (13971), 4666 states have internal predecessors, (13971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 13971 transitions. [2021-07-13 20:08:01,169 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 13971 transitions. Word has length 42 [2021-07-13 20:08:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:01,169 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 13971 transitions. [2021-07-13 20:08:01,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 13971 transitions. [2021-07-13 20:08:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:01,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:01,175 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:01,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:08:01,376 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542403, now seen corresponding path program 41 times [2021-07-13 20:08:01,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:01,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863303800] [2021-07-13 20:08:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:01,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:01,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863303800] [2021-07-13 20:08:01,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863303800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:01,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341088556] [2021-07-13 20:08:01,566 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 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 [2021-07-13 20:08:01,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:01,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:01,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:01,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:01,667 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 7 [2021-07-13 20:08:01,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:01,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:01,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:01,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:01,775 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 11 treesize of output 7 [2021-07-13 20:08:01,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:01,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:01,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:01,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:01,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341088556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:01,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:01,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:08:01,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605165688] [2021-07-13 20:08:01,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:01,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:01,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:01,973 INFO L87 Difference]: Start difference. First operand 4667 states and 13971 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:03,269 INFO L93 Difference]: Finished difference Result 6156 states and 17997 transitions. [2021-07-13 20:08:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:08:03,269 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:03,279 INFO L225 Difference]: With dead ends: 6156 [2021-07-13 20:08:03,279 INFO L226 Difference]: Without dead ends: 5868 [2021-07-13 20:08:03,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1017.3ms TimeCoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:08:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2021-07-13 20:08:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 4636. [2021-07-13 20:08:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-07-13 20:08:03,356 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-07-13 20:08:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:03,356 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-07-13 20:08:03,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-07-13 20:08:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:03,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:03,363 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:03,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:08:03,563 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash -517812027, now seen corresponding path program 42 times [2021-07-13 20:08:03,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:03,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297165364] [2021-07-13 20:08:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:03,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:03,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297165364] [2021-07-13 20:08:03,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297165364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:03,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315834907] [2021-07-13 20:08:03,766 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 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 [2021-07-13 20:08:03,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:08:03,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:08:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:03,850 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 7 [2021-07-13 20:08:03,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:03,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:03,951 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 11 treesize of output 7 [2021-07-13 20:08:03,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:03,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:04,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315834907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:04,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:04,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139338570] [2021-07-13 20:08:04,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:04,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:04,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:04,064 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:05,088 INFO L93 Difference]: Finished difference Result 5469 states and 15943 transitions. [2021-07-13 20:08:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:08:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:05,097 INFO L225 Difference]: With dead ends: 5469 [2021-07-13 20:08:05,097 INFO L226 Difference]: Without dead ends: 5248 [2021-07-13 20:08:05,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 763.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:08:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-07-13 20:08:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 4639. [2021-07-13 20:08:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.99374730487279) internal successors, (13885), 4638 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13885 transitions. [2021-07-13 20:08:05,161 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13885 transitions. Word has length 42 [2021-07-13 20:08:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:05,161 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13885 transitions. [2021-07-13 20:08:05,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13885 transitions. [2021-07-13 20:08:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:05,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:05,168 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:05,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:08:05,369 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1546931845, now seen corresponding path program 43 times [2021-07-13 20:08:05,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:05,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904614572] [2021-07-13 20:08:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:05,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:05,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904614572] [2021-07-13 20:08:05,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904614572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:05,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210561927] [2021-07-13 20:08:05,565 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 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 [2021-07-13 20:08:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:05,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:05,649 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 11 treesize of output 7 [2021-07-13 20:08:05,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:05,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:05,764 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 11 treesize of output 7 [2021-07-13 20:08:05,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:05,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:05,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210561927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:05,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:05,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:05,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923015506] [2021-07-13 20:08:05,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:05,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:05,882 INFO L87 Difference]: Start difference. First operand 4639 states and 13885 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:07,083 INFO L93 Difference]: Finished difference Result 5756 states and 16705 transitions. [2021-07-13 20:08:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:08:07,083 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:07,093 INFO L225 Difference]: With dead ends: 5756 [2021-07-13 20:08:07,093 INFO L226 Difference]: Without dead ends: 5535 [2021-07-13 20:08:07,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:08:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-07-13 20:08:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4651. [2021-07-13 20:08:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9956989247311827) internal successors, (13930), 4650 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13930 transitions. [2021-07-13 20:08:07,167 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13930 transitions. Word has length 42 [2021-07-13 20:08:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:07,167 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13930 transitions. [2021-07-13 20:08:07,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13930 transitions. [2021-07-13 20:08:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:07,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:07,174 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:07,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:07,375 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2041454487, now seen corresponding path program 44 times [2021-07-13 20:08:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:07,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117177032] [2021-07-13 20:08:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:07,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117177032] [2021-07-13 20:08:07,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117177032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:07,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44272896] [2021-07-13 20:08:07,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:07,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:07,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:07,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:07,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:07,715 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 7 [2021-07-13 20:08:07,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:07,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:07,806 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 11 treesize of output 7 [2021-07-13 20:08:07,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:07,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:07,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44272896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:07,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:07,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:07,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529440136] [2021-07-13 20:08:07,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:07,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:07,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:07,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:07,951 INFO L87 Difference]: Start difference. First operand 4651 states and 13930 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:09,092 INFO L93 Difference]: Finished difference Result 5951 states and 17366 transitions. [2021-07-13 20:08:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:08:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:09,103 INFO L225 Difference]: With dead ends: 5951 [2021-07-13 20:08:09,103 INFO L226 Difference]: Without dead ends: 5730 [2021-07-13 20:08:09,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:08:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-07-13 20:08:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 4655. [2021-07-13 20:08:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.995487752470993) internal successors, (13941), 4654 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13941 transitions. [2021-07-13 20:08:09,176 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13941 transitions. Word has length 42 [2021-07-13 20:08:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:09,176 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13941 transitions. [2021-07-13 20:08:09,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13941 transitions. [2021-07-13 20:08:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:09,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:09,183 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:09,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:09,384 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash -659412613, now seen corresponding path program 45 times [2021-07-13 20:08:09,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:09,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015086975] [2021-07-13 20:08:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:09,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:09,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015086975] [2021-07-13 20:08:09,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015086975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182123542] [2021-07-13 20:08:09,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:09,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:08:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:09,705 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 7 [2021-07-13 20:08:09,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:09,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:09,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:09,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:09,781 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 11 treesize of output 7 [2021-07-13 20:08:09,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:09,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:09,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:09,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:09,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182123542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:09,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:09,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304711008] [2021-07-13 20:08:09,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:09,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:09,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:09,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:09,934 INFO L87 Difference]: Start difference. First operand 4655 states and 13941 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:11,200 INFO L93 Difference]: Finished difference Result 6545 states and 19010 transitions. [2021-07-13 20:08:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:08:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:11,211 INFO L225 Difference]: With dead ends: 6545 [2021-07-13 20:08:11,212 INFO L226 Difference]: Without dead ends: 6359 [2021-07-13 20:08:11,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 918.5ms TimeCoverageRelationStatistics Valid=239, Invalid=2311, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:08:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6359 states. [2021-07-13 20:08:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6359 to 4636. [2021-07-13 20:08:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-07-13 20:08:11,285 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-07-13 20:08:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:11,285 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-07-13 20:08:11,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-07-13 20:08:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:11,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:11,291 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:11,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:08:11,492 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1386319427, now seen corresponding path program 46 times [2021-07-13 20:08:11,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:11,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54028567] [2021-07-13 20:08:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:11,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54028567] [2021-07-13 20:08:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54028567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339535831] [2021-07-13 20:08:11,701 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 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 [2021-07-13 20:08:11,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:11,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:11,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:11,790 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 11 treesize of output 7 [2021-07-13 20:08:11,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:11,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:11,870 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 11 treesize of output 7 [2021-07-13 20:08:11,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:11,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:11,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339535831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:11,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:11,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:08:11,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126570718] [2021-07-13 20:08:11,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:08:11,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:11,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:08:11,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:11,981 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:12,814 INFO L93 Difference]: Finished difference Result 5213 states and 15315 transitions. [2021-07-13 20:08:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:08:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:12,823 INFO L225 Difference]: With dead ends: 5213 [2021-07-13 20:08:12,823 INFO L226 Difference]: Without dead ends: 4992 [2021-07-13 20:08:12,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:08:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-07-13 20:08:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 4636. [2021-07-13 20:08:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-07-13 20:08:12,891 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-07-13 20:08:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:12,891 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-07-13 20:08:12,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-07-13 20:08:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:12,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:12,897 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:13,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:13,098 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1684196809, now seen corresponding path program 47 times [2021-07-13 20:08:13,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:13,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942927588] [2021-07-13 20:08:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:13,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942927588] [2021-07-13 20:08:13,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942927588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794965793] [2021-07-13 20:08:13,315 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 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 [2021-07-13 20:08:13,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:08:13,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:13,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:13,419 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 7 [2021-07-13 20:08:13,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:13,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:13,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:13,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:13,504 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 7 [2021-07-13 20:08:13,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:13,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:13,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:13,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-07-13 20:08:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:13,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794965793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:13,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:13,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-07-13 20:08:13,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278040798] [2021-07-13 20:08:13,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:08:13,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:08:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:13,608 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:14,291 INFO L93 Difference]: Finished difference Result 5470 states and 15956 transitions. [2021-07-13 20:08:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:08:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:14,299 INFO L225 Difference]: With dead ends: 5470 [2021-07-13 20:08:14,299 INFO L226 Difference]: Without dead ends: 5249 [2021-07-13 20:08:14,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 685.1ms TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:08:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-07-13 20:08:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 4629. [2021-07-13 20:08:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.993733794295592) internal successors, (13855), 4628 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13855 transitions. [2021-07-13 20:08:14,365 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13855 transitions. Word has length 42 [2021-07-13 20:08:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:14,366 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 13855 transitions. [2021-07-13 20:08:14,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13855 transitions. [2021-07-13 20:08:14,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:14,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:14,374 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:14,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:08:14,589 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1506142589, now seen corresponding path program 48 times [2021-07-13 20:08:14,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:14,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862158737] [2021-07-13 20:08:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:14,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:14,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862158737] [2021-07-13 20:08:14,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862158737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:14,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868099049] [2021-07-13 20:08:14,804 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 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 [2021-07-13 20:08:14,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:08:14,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:14,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:14,910 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 11 treesize of output 7 [2021-07-13 20:08:14,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:14,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:14,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:14,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:15,006 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 11 treesize of output 7 [2021-07-13 20:08:15,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:15,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:15,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:15,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:15,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868099049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:15,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:15,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:15,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677404978] [2021-07-13 20:08:15,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:15,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:15,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:15,158 INFO L87 Difference]: Start difference. First operand 4629 states and 13855 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:16,260 INFO L93 Difference]: Finished difference Result 5915 states and 17168 transitions. [2021-07-13 20:08:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:08:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:16,269 INFO L225 Difference]: With dead ends: 5915 [2021-07-13 20:08:16,269 INFO L226 Difference]: Without dead ends: 5694 [2021-07-13 20:08:16,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 833.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:08:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-07-13 20:08:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 4649. [2021-07-13 20:08:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.996987951807229) internal successors, (13930), 4648 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13930 transitions. [2021-07-13 20:08:16,343 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13930 transitions. Word has length 42 [2021-07-13 20:08:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:16,343 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13930 transitions. [2021-07-13 20:08:16,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13930 transitions. [2021-07-13 20:08:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:16,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:16,350 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:16,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:08:16,551 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:16,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2082243743, now seen corresponding path program 49 times [2021-07-13 20:08:16,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:16,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685933064] [2021-07-13 20:08:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:16,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:16,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685933064] [2021-07-13 20:08:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685933064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:16,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191170870] [2021-07-13 20:08:16,735 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 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 [2021-07-13 20:08:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:16,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:16,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:16,824 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 11 treesize of output 7 [2021-07-13 20:08:16,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:16,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:16,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:16,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:16,907 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 11 treesize of output 7 [2021-07-13 20:08:16,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:16,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:16,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:16,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:17,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191170870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:17,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:17,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364957679] [2021-07-13 20:08:17,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:17,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:17,045 INFO L87 Difference]: Start difference. First operand 4649 states and 13930 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:18,175 INFO L93 Difference]: Finished difference Result 6319 states and 18331 transitions. [2021-07-13 20:08:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:08:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:18,185 INFO L225 Difference]: With dead ends: 6319 [2021-07-13 20:08:18,185 INFO L226 Difference]: Without dead ends: 6098 [2021-07-13 20:08:18,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 769.7ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:08:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6098 states. [2021-07-13 20:08:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 4653. [2021-07-13 20:08:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.996775580395529) internal successors, (13941), 4652 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13941 transitions. [2021-07-13 20:08:18,263 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13941 transitions. Word has length 42 [2021-07-13 20:08:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:18,263 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 13941 transitions. [2021-07-13 20:08:18,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13941 transitions. [2021-07-13 20:08:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:18,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:18,270 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:18,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:08:18,471 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:18,471 INFO L82 PathProgramCache]: Analyzing trace with hash -618623357, now seen corresponding path program 50 times [2021-07-13 20:08:18,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:18,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61073646] [2021-07-13 20:08:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:18,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:18,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61073646] [2021-07-13 20:08:18,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61073646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:18,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200399711] [2021-07-13 20:08:18,705 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 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 [2021-07-13 20:08:18,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:18,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:18,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:18,819 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 7 [2021-07-13 20:08:18,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:18,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:18,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:18,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:18,900 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 11 treesize of output 7 [2021-07-13 20:08:18,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:18,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:18,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:18,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:19,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200399711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:19,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:19,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:19,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008730086] [2021-07-13 20:08:19,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:19,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:19,031 INFO L87 Difference]: Start difference. First operand 4653 states and 13941 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:20,196 INFO L93 Difference]: Finished difference Result 6961 states and 20115 transitions. [2021-07-13 20:08:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:08:20,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:20,206 INFO L225 Difference]: With dead ends: 6961 [2021-07-13 20:08:20,207 INFO L226 Difference]: Without dead ends: 6775 [2021-07-13 20:08:20,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:08:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2021-07-13 20:08:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 4637. [2021-07-13 20:08:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.9950388265746333) internal successors, (13885), 4636 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13885 transitions. [2021-07-13 20:08:20,274 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13885 transitions. Word has length 42 [2021-07-13 20:08:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:20,274 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13885 transitions. [2021-07-13 20:08:20,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13885 transitions. [2021-07-13 20:08:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:20,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:20,279 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:20,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:08:20,480 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:20,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1464774981, now seen corresponding path program 51 times [2021-07-13 20:08:20,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:20,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156644658] [2021-07-13 20:08:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:20,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:20,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156644658] [2021-07-13 20:08:20,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156644658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:20,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321419368] [2021-07-13 20:08:20,657 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 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 [2021-07-13 20:08:20,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:08:20,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:20,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:08:20,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:20,742 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 11 treesize of output 7 [2021-07-13 20:08:20,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:20,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:20,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:20,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:20,834 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 11 treesize of output 7 [2021-07-13 20:08:20,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:20,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:20,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:20,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:20,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321419368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:20,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:20,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:08:20,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559265746] [2021-07-13 20:08:20,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:08:20,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:20,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:08:20,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:08:20,953 INFO L87 Difference]: Start difference. First operand 4637 states and 13885 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:21,866 INFO L93 Difference]: Finished difference Result 5846 states and 16961 transitions. [2021-07-13 20:08:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:08:21,866 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:21,874 INFO L225 Difference]: With dead ends: 5846 [2021-07-13 20:08:21,874 INFO L226 Difference]: Without dead ends: 5625 [2021-07-13 20:08:21,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:08:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5625 states. [2021-07-13 20:08:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5625 to 4627. [2021-07-13 20:08:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-07-13 20:08:21,937 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-07-13 20:08:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:21,937 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-07-13 20:08:21,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-07-13 20:08:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:21,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:21,943 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:22,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:22,155 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:22,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1771046891, now seen corresponding path program 52 times [2021-07-13 20:08:22,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:22,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113155809] [2021-07-13 20:08:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:22,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:22,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113155809] [2021-07-13 20:08:22,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113155809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:22,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759259852] [2021-07-13 20:08:22,336 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 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 [2021-07-13 20:08:22,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:22,428 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 11 treesize of output 7 [2021-07-13 20:08:22,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:22,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:22,502 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 11 treesize of output 7 [2021-07-13 20:08:22,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:22,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:22,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759259852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:22,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:22,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:22,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325346005] [2021-07-13 20:08:22,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:22,668 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:23,489 INFO L93 Difference]: Finished difference Result 5265 states and 15611 transitions. [2021-07-13 20:08:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:08:23,490 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:23,499 INFO L225 Difference]: With dead ends: 5265 [2021-07-13 20:08:23,499 INFO L226 Difference]: Without dead ends: 5044 [2021-07-13 20:08:23,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:08:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2021-07-13 20:08:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 4647. [2021-07-13 20:08:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4646 states have (on average 2.992251399052949) internal successors, (13902), 4646 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 13902 transitions. [2021-07-13 20:08:23,587 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 13902 transitions. Word has length 42 [2021-07-13 20:08:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:23,587 INFO L482 AbstractCegarLoop]: Abstraction has 4647 states and 13902 transitions. [2021-07-13 20:08:23,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 13902 transitions. [2021-07-13 20:08:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:23,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:23,593 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:23,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:08:23,797 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:23,799 INFO L82 PathProgramCache]: Analyzing trace with hash -176946695, now seen corresponding path program 53 times [2021-07-13 20:08:23,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:23,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730929078] [2021-07-13 20:08:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:23,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:23,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730929078] [2021-07-13 20:08:23,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730929078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:23,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541045736] [2021-07-13 20:08:23,994 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 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 [2021-07-13 20:08:24,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:24,091 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 7 [2021-07-13 20:08:24,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:24,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:24,165 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 7 [2021-07-13 20:08:24,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:24,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:24,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541045736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:24,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:24,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730958332] [2021-07-13 20:08:24,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:24,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:24,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:24,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:24,330 INFO L87 Difference]: Start difference. First operand 4647 states and 13902 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:25,258 INFO L93 Difference]: Finished difference Result 5631 states and 16717 transitions. [2021-07-13 20:08:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:08:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:25,268 INFO L225 Difference]: With dead ends: 5631 [2021-07-13 20:08:25,268 INFO L226 Difference]: Without dead ends: 5445 [2021-07-13 20:08:25,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 770.0ms TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:08:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-07-13 20:08:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 4643. [2021-07-13 20:08:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9924601464885825) internal successors, (13891), 4642 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13891 transitions. [2021-07-13 20:08:25,371 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13891 transitions. Word has length 42 [2021-07-13 20:08:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:25,371 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 13891 transitions. [2021-07-13 20:08:25,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13891 transitions. [2021-07-13 20:08:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:25,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:25,378 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:25,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:25,597 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1303210487, now seen corresponding path program 54 times [2021-07-13 20:08:25,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:25,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155592925] [2021-07-13 20:08:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:25,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:25,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155592925] [2021-07-13 20:08:25,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155592925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:25,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543396568] [2021-07-13 20:08:25,799 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 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 [2021-07-13 20:08:25,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:08:25,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:25,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:25,898 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 7 [2021-07-13 20:08:25,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:25,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:25,968 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 11 treesize of output 7 [2021-07-13 20:08:25,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:25,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:26,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543396568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:26,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:26,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123835686] [2021-07-13 20:08:26,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:26,144 INFO L87 Difference]: Start difference. First operand 4643 states and 13891 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:27,089 INFO L93 Difference]: Finished difference Result 5522 states and 16407 transitions. [2021-07-13 20:08:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:08:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:27,099 INFO L225 Difference]: With dead ends: 5522 [2021-07-13 20:08:27,099 INFO L226 Difference]: Without dead ends: 5336 [2021-07-13 20:08:27,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 776.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:08:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-07-13 20:08:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4639. [2021-07-13 20:08:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.9926692539887885) internal successors, (13880), 4638 states have internal predecessors, (13880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13880 transitions. [2021-07-13 20:08:27,164 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13880 transitions. Word has length 42 [2021-07-13 20:08:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:27,164 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13880 transitions. [2021-07-13 20:08:27,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13880 transitions. [2021-07-13 20:08:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:27,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:27,170 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:27,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:08:27,370 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2138477189, now seen corresponding path program 55 times [2021-07-13 20:08:27,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:27,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665059758] [2021-07-13 20:08:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:27,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:27,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665059758] [2021-07-13 20:08:27,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665059758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806052079] [2021-07-13 20:08:27,605 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 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 [2021-07-13 20:08:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:27,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:27,688 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 11 treesize of output 7 [2021-07-13 20:08:27,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:27,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:27,801 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 11 treesize of output 7 [2021-07-13 20:08:27,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:27,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:27,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806052079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:27,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:27,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004746666] [2021-07-13 20:08:27,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:27,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:27,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:27,918 INFO L87 Difference]: Start difference. First operand 4639 states and 13880 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:29,074 INFO L93 Difference]: Finished difference Result 5221 states and 15358 transitions. [2021-07-13 20:08:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:08:29,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:29,083 INFO L225 Difference]: With dead ends: 5221 [2021-07-13 20:08:29,083 INFO L226 Difference]: Without dead ends: 5000 [2021-07-13 20:08:29,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:08:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-07-13 20:08:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4651. [2021-07-13 20:08:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9946236559139785) internal successors, (13925), 4650 states have internal predecessors, (13925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13925 transitions. [2021-07-13 20:08:29,170 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13925 transitions. Word has length 42 [2021-07-13 20:08:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:29,171 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13925 transitions. [2021-07-13 20:08:29,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13925 transitions. [2021-07-13 20:08:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:29,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:29,177 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:29,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:29,378 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1449909143, now seen corresponding path program 56 times [2021-07-13 20:08:29,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:29,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851646653] [2021-07-13 20:08:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:29,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851646653] [2021-07-13 20:08:29,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851646653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159382994] [2021-07-13 20:08:29,560 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 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 [2021-07-13 20:08:29,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:29,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:29,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:29,653 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 7 [2021-07-13 20:08:29,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:29,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:29,767 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 11 treesize of output 7 [2021-07-13 20:08:29,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:29,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:29,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159382994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:29,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:29,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688882736] [2021-07-13 20:08:29,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:29,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:29,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:29,910 INFO L87 Difference]: Start difference. First operand 4651 states and 13925 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:30,933 INFO L93 Difference]: Finished difference Result 5683 states and 16654 transitions. [2021-07-13 20:08:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:08:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:30,944 INFO L225 Difference]: With dead ends: 5683 [2021-07-13 20:08:30,944 INFO L226 Difference]: Without dead ends: 5462 [2021-07-13 20:08:30,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 865.1ms TimeCoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:08:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-07-13 20:08:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 4655. [2021-07-13 20:08:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.994413407821229) internal successors, (13936), 4654 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13936 transitions. [2021-07-13 20:08:31,040 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13936 transitions. Word has length 42 [2021-07-13 20:08:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:31,040 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13936 transitions. [2021-07-13 20:08:31,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13936 transitions. [2021-07-13 20:08:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:31,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:31,047 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:31,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:08:31,247 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:31,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1250957957, now seen corresponding path program 57 times [2021-07-13 20:08:31,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:31,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761608353] [2021-07-13 20:08:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:31,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:31,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761608353] [2021-07-13 20:08:31,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761608353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312424051] [2021-07-13 20:08:31,468 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 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 [2021-07-13 20:08:31,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:08:31,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:31,576 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 7 [2021-07-13 20:08:31,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:31,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:31,698 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 11 treesize of output 7 [2021-07-13 20:08:31,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:31,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312424051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:31,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197333698] [2021-07-13 20:08:31,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:31,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:31,851 INFO L87 Difference]: Start difference. First operand 4655 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:33,093 INFO L93 Difference]: Finished difference Result 6077 states and 17816 transitions. [2021-07-13 20:08:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:08:33,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:33,103 INFO L225 Difference]: With dead ends: 6077 [2021-07-13 20:08:33,103 INFO L226 Difference]: Without dead ends: 5891 [2021-07-13 20:08:33,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1022.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:08:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2021-07-13 20:08:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 4627. [2021-07-13 20:08:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-07-13 20:08:33,172 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-07-13 20:08:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:33,172 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-07-13 20:08:33,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-07-13 20:08:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:33,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:33,179 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:33,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:33,380 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1209727891, now seen corresponding path program 58 times [2021-07-13 20:08:33,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:33,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003537136] [2021-07-13 20:08:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:33,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003537136] [2021-07-13 20:08:33,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003537136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336789893] [2021-07-13 20:08:33,596 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 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 [2021-07-13 20:08:33,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:33,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:33,714 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 11 treesize of output 7 [2021-07-13 20:08:33,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:33,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:33,858 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 11 treesize of output 7 [2021-07-13 20:08:33,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:33,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:33,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336789893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:33,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:33,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136440497] [2021-07-13 20:08:33,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:33,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:33,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:33,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:33,993 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:35,229 INFO L93 Difference]: Finished difference Result 5890 states and 17085 transitions. [2021-07-13 20:08:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:08:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:35,241 INFO L225 Difference]: With dead ends: 5890 [2021-07-13 20:08:35,241 INFO L226 Difference]: Without dead ends: 5669 [2021-07-13 20:08:35,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 955.7ms TimeCoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:08:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2021-07-13 20:08:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 4639. [2021-07-13 20:08:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.995256576110392) internal successors, (13892), 4638 states have internal predecessors, (13892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13892 transitions. [2021-07-13 20:08:35,316 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13892 transitions. Word has length 42 [2021-07-13 20:08:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:35,316 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13892 transitions. [2021-07-13 20:08:35,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13892 transitions. [2021-07-13 20:08:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:35,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:35,323 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:35,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:08:35,524 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:35,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:35,524 INFO L82 PathProgramCache]: Analyzing trace with hash 503146927, now seen corresponding path program 59 times [2021-07-13 20:08:35,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:35,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754901886] [2021-07-13 20:08:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:35,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754901886] [2021-07-13 20:08:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754901886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383034924] [2021-07-13 20:08:35,729 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 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 [2021-07-13 20:08:35,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:35,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:35,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:35,835 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 7 [2021-07-13 20:08:35,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:35,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:35,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:35,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:35,945 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 7 [2021-07-13 20:08:35,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:35,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:35,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:35,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:08:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:36,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383034924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:36,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:36,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:36,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009922812] [2021-07-13 20:08:36,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:36,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:36,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:36,113 INFO L87 Difference]: Start difference. First operand 4639 states and 13892 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:37,398 INFO L93 Difference]: Finished difference Result 6190 states and 17997 transitions. [2021-07-13 20:08:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:08:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:37,422 INFO L225 Difference]: With dead ends: 6190 [2021-07-13 20:08:37,422 INFO L226 Difference]: Without dead ends: 5969 [2021-07-13 20:08:37,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 987.2ms TimeCoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:08:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-07-13 20:08:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 4643. [2021-07-13 20:08:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9950452391210685) internal successors, (13903), 4642 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13903 transitions. [2021-07-13 20:08:37,538 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13903 transitions. Word has length 42 [2021-07-13 20:08:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:37,539 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 13903 transitions. [2021-07-13 20:08:37,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13903 transitions. [2021-07-13 20:08:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:37,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:37,547 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:37,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:37,761 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2097247123, now seen corresponding path program 60 times [2021-07-13 20:08:37,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:37,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633097118] [2021-07-13 20:08:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:37,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:37,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633097118] [2021-07-13 20:08:37,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633097118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227355921] [2021-07-13 20:08:37,944 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 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 [2021-07-13 20:08:37,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:08:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:38,031 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 7 [2021-07-13 20:08:38,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:38,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:38,123 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 11 treesize of output 7 [2021-07-13 20:08:38,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:38,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:38,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227355921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:38,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:38,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306190983] [2021-07-13 20:08:38,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:38,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:38,260 INFO L87 Difference]: Start difference. First operand 4643 states and 13903 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:39,659 INFO L93 Difference]: Finished difference Result 6784 states and 19641 transitions. [2021-07-13 20:08:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:08:39,659 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:39,672 INFO L225 Difference]: With dead ends: 6784 [2021-07-13 20:08:39,672 INFO L226 Difference]: Without dead ends: 6598 [2021-07-13 20:08:39,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 960.2ms TimeCoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:08:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-07-13 20:08:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 4627. [2021-07-13 20:08:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-07-13 20:08:39,758 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-07-13 20:08:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:39,759 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-07-13 20:08:39,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-07-13 20:08:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:39,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:39,764 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:39,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:08:39,965 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -114321835, now seen corresponding path program 61 times [2021-07-13 20:08:39,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:39,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183763867] [2021-07-13 20:08:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:40,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:40,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183763867] [2021-07-13 20:08:40,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183763867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:40,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668495355] [2021-07-13 20:08:40,149 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 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 [2021-07-13 20:08:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:40,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:40,249 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 11 treesize of output 7 [2021-07-13 20:08:40,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:40,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:40,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:40,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:40,365 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 11 treesize of output 7 [2021-07-13 20:08:40,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:40,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:40,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:40,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:40,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668495355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:40,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:40,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991489382] [2021-07-13 20:08:40,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:40,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:40,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:40,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:40,480 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:41,531 INFO L93 Difference]: Finished difference Result 5487 states and 16039 transitions. [2021-07-13 20:08:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:08:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:41,545 INFO L225 Difference]: With dead ends: 5487 [2021-07-13 20:08:41,545 INFO L226 Difference]: Without dead ends: 5266 [2021-07-13 20:08:41,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=247, Invalid=2203, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:08:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2021-07-13 20:08:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 4586. [2021-07-13 20:08:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994547437295529) internal successors, (13730), 4585 states have internal predecessors, (13730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13730 transitions. [2021-07-13 20:08:41,639 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13730 transitions. Word has length 42 [2021-07-13 20:08:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:41,640 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13730 transitions. [2021-07-13 20:08:41,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13730 transitions. [2021-07-13 20:08:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:41,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:41,648 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:41,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:08:41,861 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:41,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1731534181, now seen corresponding path program 62 times [2021-07-13 20:08:41,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:41,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716515190] [2021-07-13 20:08:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:42,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:42,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716515190] [2021-07-13 20:08:42,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716515190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:42,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856494241] [2021-07-13 20:08:42,032 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 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 [2021-07-13 20:08:42,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:42,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:42,213 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 7 [2021-07-13 20:08:42,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:42,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:42,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:42,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:42,259 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 11 treesize of output 7 [2021-07-13 20:08:42,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:42,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:42,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:42,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:42,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856494241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:42,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:42,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:42,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861986222] [2021-07-13 20:08:42,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:42,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:42,372 INFO L87 Difference]: Start difference. First operand 4586 states and 13730 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:43,257 INFO L93 Difference]: Finished difference Result 5807 states and 16947 transitions. [2021-07-13 20:08:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:08:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:43,270 INFO L225 Difference]: With dead ends: 5807 [2021-07-13 20:08:43,270 INFO L226 Difference]: Without dead ends: 5556 [2021-07-13 20:08:43,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 721.8ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:08:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-07-13 20:08:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 4622. [2021-07-13 20:08:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 4621 states have (on average 2.9939407054750053) internal successors, (13835), 4621 states have internal predecessors, (13835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 13835 transitions. [2021-07-13 20:08:43,369 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 13835 transitions. Word has length 42 [2021-07-13 20:08:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:43,369 INFO L482 AbstractCegarLoop]: Abstraction has 4622 states and 13835 transitions. [2021-07-13 20:08:43,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 13835 transitions. [2021-07-13 20:08:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:43,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:43,378 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:43,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:08:43,597 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:43,597 INFO L82 PathProgramCache]: Analyzing trace with hash -868421097, now seen corresponding path program 63 times [2021-07-13 20:08:43,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:43,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173150226] [2021-07-13 20:08:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:43,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:43,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173150226] [2021-07-13 20:08:43,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173150226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:43,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053844165] [2021-07-13 20:08:43,784 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 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 [2021-07-13 20:08:43,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:08:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:08:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:43,956 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 7 [2021-07-13 20:08:43,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:43,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:43,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:43,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:44,045 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 11 treesize of output 7 [2021-07-13 20:08:44,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:44,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:44,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:44,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:44,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053844165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:44,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:44,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:44,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378382913] [2021-07-13 20:08:44,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:44,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:44,192 INFO L87 Difference]: Start difference. First operand 4622 states and 13835 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:45,093 INFO L93 Difference]: Finished difference Result 6002 states and 17329 transitions. [2021-07-13 20:08:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:08:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:45,103 INFO L225 Difference]: With dead ends: 6002 [2021-07-13 20:08:45,103 INFO L226 Difference]: Without dead ends: 5781 [2021-07-13 20:08:45,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 833.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:08:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-07-13 20:08:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 4625. [2021-07-13 20:08:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.9943771626297577) internal successors, (13846), 4624 states have internal predecessors, (13846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13846 transitions. [2021-07-13 20:08:45,175 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13846 transitions. Word has length 42 [2021-07-13 20:08:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:45,175 INFO L482 AbstractCegarLoop]: Abstraction has 4625 states and 13846 transitions. [2021-07-13 20:08:45,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13846 transitions. [2021-07-13 20:08:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:45,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:45,181 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:45,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:45,382 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1897540915, now seen corresponding path program 64 times [2021-07-13 20:08:45,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:45,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307123228] [2021-07-13 20:08:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:45,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:45,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307123228] [2021-07-13 20:08:45,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307123228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:45,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139042866] [2021-07-13 20:08:45,574 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 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 [2021-07-13 20:08:45,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:45,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:45,706 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 11 treesize of output 7 [2021-07-13 20:08:45,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:45,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:45,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:45,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:08:45,772 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 11 treesize of output 7 [2021-07-13 20:08:45,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:45,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:45,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:45,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:45,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139042866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:45,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:45,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:45,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808693771] [2021-07-13 20:08:45,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:45,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:45,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:45,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:45,890 INFO L87 Difference]: Start difference. First operand 4625 states and 13846 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:47,029 INFO L93 Difference]: Finished difference Result 6284 states and 18100 transitions. [2021-07-13 20:08:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:08:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:47,038 INFO L225 Difference]: With dead ends: 6284 [2021-07-13 20:08:47,039 INFO L226 Difference]: Without dead ends: 6063 [2021-07-13 20:08:47,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 813.2ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:08:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-07-13 20:08:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4637. [2021-07-13 20:08:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.996333045729077) internal successors, (13891), 4636 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13891 transitions. [2021-07-13 20:08:47,105 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13891 transitions. Word has length 42 [2021-07-13 20:08:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:47,105 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13891 transitions. [2021-07-13 20:08:47,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13891 transitions. [2021-07-13 20:08:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:47,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:47,110 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:47,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:47,311 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1690845417, now seen corresponding path program 65 times [2021-07-13 20:08:47,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:47,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492850954] [2021-07-13 20:08:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:47,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:47,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492850954] [2021-07-13 20:08:47,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492850954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565345537] [2021-07-13 20:08:47,486 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 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 [2021-07-13 20:08:47,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:47,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:47,627 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 7 [2021-07-13 20:08:47,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:47,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:47,677 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 11 treesize of output 7 [2021-07-13 20:08:47,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:47,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565345537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:47,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:08:47,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866085779] [2021-07-13 20:08:47,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:47,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:47,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:47,894 INFO L87 Difference]: Start difference. First operand 4637 states and 13891 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:49,116 INFO L93 Difference]: Finished difference Result 6560 states and 18993 transitions. [2021-07-13 20:08:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:08:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:49,127 INFO L225 Difference]: With dead ends: 6560 [2021-07-13 20:08:49,127 INFO L226 Difference]: Without dead ends: 6339 [2021-07-13 20:08:49,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 945.2ms TimeCoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:08:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2021-07-13 20:08:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 4641. [2021-07-13 20:08:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9961206896551724) internal successors, (13902), 4640 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13902 transitions. [2021-07-13 20:08:49,200 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13902 transitions. Word has length 42 [2021-07-13 20:08:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:49,200 INFO L482 AbstractCegarLoop]: Abstraction has 4641 states and 13902 transitions. [2021-07-13 20:08:49,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13902 transitions. [2021-07-13 20:08:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:49,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:49,206 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:49,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:49,406 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1010021683, now seen corresponding path program 66 times [2021-07-13 20:08:49,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:49,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717359185] [2021-07-13 20:08:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:49,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717359185] [2021-07-13 20:08:49,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717359185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433138942] [2021-07-13 20:08:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:49,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:08:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:49,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:49,714 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 7 [2021-07-13 20:08:49,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:49,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:49,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:49,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:49,760 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 11 treesize of output 7 [2021-07-13 20:08:49,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:49,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:49,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:49,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:49,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433138942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:49,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:49,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:49,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238525835] [2021-07-13 20:08:49,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:49,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:49,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:49,921 INFO L87 Difference]: Start difference. First operand 4641 states and 13902 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:51,258 INFO L93 Difference]: Finished difference Result 7255 states and 20991 transitions. [2021-07-13 20:08:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:08:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:51,271 INFO L225 Difference]: With dead ends: 7255 [2021-07-13 20:08:51,272 INFO L226 Difference]: Without dead ends: 7069 [2021-07-13 20:08:51,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 957.7ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:08:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2021-07-13 20:08:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 4610. [2021-07-13 20:08:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.992189195053157) internal successors, (13791), 4609 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13791 transitions. [2021-07-13 20:08:51,349 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13791 transitions. Word has length 42 [2021-07-13 20:08:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:51,349 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 13791 transitions. [2021-07-13 20:08:51,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13791 transitions. [2021-07-13 20:08:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:51,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:51,355 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:51,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:08:51,555 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:51,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2091466075, now seen corresponding path program 67 times [2021-07-13 20:08:51,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:51,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903311320] [2021-07-13 20:08:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:51,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:51,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903311320] [2021-07-13 20:08:51,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903311320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:51,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356513949] [2021-07-13 20:08:51,756 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 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 [2021-07-13 20:08:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:51,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:51,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:51,880 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 11 treesize of output 7 [2021-07-13 20:08:51,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:51,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:51,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:51,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:08:52,002 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 11 treesize of output 7 [2021-07-13 20:08:52,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:52,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:52,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:52,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:52,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356513949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:52,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:52,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:52,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414550563] [2021-07-13 20:08:52,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:52,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:52,144 INFO L87 Difference]: Start difference. First operand 4610 states and 13791 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:52,968 INFO L93 Difference]: Finished difference Result 5159 states and 15159 transitions. [2021-07-13 20:08:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:08:52,968 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:52,976 INFO L225 Difference]: With dead ends: 5159 [2021-07-13 20:08:52,977 INFO L226 Difference]: Without dead ends: 4938 [2021-07-13 20:08:52,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 803.5ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:08:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-07-13 20:08:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4616. [2021-07-13 20:08:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9924160346695556) internal successors, (13810), 4615 states have internal predecessors, (13810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13810 transitions. [2021-07-13 20:08:53,042 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13810 transitions. Word has length 42 [2021-07-13 20:08:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:53,042 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13810 transitions. [2021-07-13 20:08:53,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13810 transitions. [2021-07-13 20:08:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:53,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:53,048 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:53,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:53,249 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1062346257, now seen corresponding path program 68 times [2021-07-13 20:08:53,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:53,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020717468] [2021-07-13 20:08:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:53,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:53,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020717468] [2021-07-13 20:08:53,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020717468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:53,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272734623] [2021-07-13 20:08:53,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:53,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:53,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:53,595 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 11 treesize of output 7 [2021-07-13 20:08:53,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:53,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:08:53,715 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 11 treesize of output 7 [2021-07-13 20:08:53,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:53,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272734623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:53,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:53,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493157604] [2021-07-13 20:08:53,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:53,850 INFO L87 Difference]: Start difference. First operand 4616 states and 13810 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:54,905 INFO L93 Difference]: Finished difference Result 5523 states and 16069 transitions. [2021-07-13 20:08:54,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:08:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:54,919 INFO L225 Difference]: With dead ends: 5523 [2021-07-13 20:08:54,919 INFO L226 Difference]: Without dead ends: 5302 [2021-07-13 20:08:54,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 882.8ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:08:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-07-13 20:08:54,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 4628. [2021-07-13 20:08:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.994380808299114) internal successors, (13855), 4627 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13855 transitions. [2021-07-13 20:08:54,984 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13855 transitions. Word has length 42 [2021-07-13 20:08:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:54,984 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13855 transitions. [2021-07-13 20:08:54,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13855 transitions. [2021-07-13 20:08:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:54,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:54,990 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:55,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:55,191 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash 355765293, now seen corresponding path program 69 times [2021-07-13 20:08:55,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:55,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644557989] [2021-07-13 20:08:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:55,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:55,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644557989] [2021-07-13 20:08:55,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644557989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922052540] [2021-07-13 20:08:55,374 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 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 [2021-07-13 20:08:55,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:08:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:55,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:55,482 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 15 treesize of output 7 [2021-07-13 20:08:55,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:55,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:55,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:55,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:08:55,557 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 11 treesize of output 7 [2021-07-13 20:08:55,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:55,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:55,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:55,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922052540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:55,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:55,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615046540] [2021-07-13 20:08:55,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:55,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:55,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:55,691 INFO L87 Difference]: Start difference. First operand 4628 states and 13855 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:56,688 INFO L93 Difference]: Finished difference Result 5694 states and 16669 transitions. [2021-07-13 20:08:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:08:56,688 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:56,697 INFO L225 Difference]: With dead ends: 5694 [2021-07-13 20:08:56,697 INFO L226 Difference]: Without dead ends: 5473 [2021-07-13 20:08:56,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:08:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-07-13 20:08:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4632. [2021-07-13 20:08:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 2.9941697257611746) internal successors, (13866), 4631 states have internal predecessors, (13866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 13866 transitions. [2021-07-13 20:08:56,764 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 13866 transitions. Word has length 42 [2021-07-13 20:08:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:56,764 INFO L482 AbstractCegarLoop]: Abstraction has 4632 states and 13866 transitions. [2021-07-13 20:08:56,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 13866 transitions. [2021-07-13 20:08:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:56,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:56,770 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:56,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:56,970 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1949865489, now seen corresponding path program 70 times [2021-07-13 20:08:56,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:56,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993731698] [2021-07-13 20:08:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:57,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993731698] [2021-07-13 20:08:57,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993731698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124286172] [2021-07-13 20:08:57,148 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 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 [2021-07-13 20:08:57,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:57,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:57,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:57,282 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 11 treesize of output 7 [2021-07-13 20:08:57,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:57,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:57,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:57,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:08:57,372 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 11 treesize of output 7 [2021-07-13 20:08:57,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:57,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:57,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:57,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:08:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:57,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124286172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:57,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:57,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:57,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326268651] [2021-07-13 20:08:57,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:57,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:57,503 INFO L87 Difference]: Start difference. First operand 4632 states and 13866 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:58,649 INFO L93 Difference]: Finished difference Result 6132 states and 17960 transitions. [2021-07-13 20:08:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:08:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:08:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:58,659 INFO L225 Difference]: With dead ends: 6132 [2021-07-13 20:08:58,659 INFO L226 Difference]: Without dead ends: 5946 [2021-07-13 20:08:58,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 853.9ms TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:08:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2021-07-13 20:08:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 4613. [2021-07-13 20:08:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.9919774501300953) internal successors, (13799), 4612 states have internal predecessors, (13799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13799 transitions. [2021-07-13 20:08:58,730 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13799 transitions. Word has length 42 [2021-07-13 20:08:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:58,731 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 13799 transitions. [2021-07-13 20:08:58,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13799 transitions. [2021-07-13 20:08:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:08:58,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:58,736 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:08:58,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:08:58,937 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash 288906651, now seen corresponding path program 71 times [2021-07-13 20:08:58,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:58,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201643282] [2021-07-13 20:08:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:59,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:59,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201643282] [2021-07-13 20:08:59,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201643282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:59,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801737781] [2021-07-13 20:08:59,123 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 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 [2021-07-13 20:08:59,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:59,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:08:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:59,231 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 11 treesize of output 7 [2021-07-13 20:08:59,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:59,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:59,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:59,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:08:59,282 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 7 [2021-07-13 20:08:59,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:59,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:59,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:59,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:08:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:59,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801737781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:59,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:59,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:08:59,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692249347] [2021-07-13 20:08:59,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:08:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:08:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:59,475 INFO L87 Difference]: Start difference. First operand 4613 states and 13799 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:00,261 INFO L93 Difference]: Finished difference Result 5251 states and 15563 transitions. [2021-07-13 20:09:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:00,261 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:09:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:00,269 INFO L225 Difference]: With dead ends: 5251 [2021-07-13 20:09:00,269 INFO L226 Difference]: Without dead ends: 5030 [2021-07-13 20:09:00,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 736.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2021-07-13 20:09:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 4633. [2021-07-13 20:09:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4632 states have (on average 2.9909326424870466) internal successors, (13854), 4632 states have internal predecessors, (13854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 13854 transitions. [2021-07-13 20:09:00,333 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 13854 transitions. Word has length 42 [2021-07-13 20:09:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:00,333 INFO L482 AbstractCegarLoop]: Abstraction has 4633 states and 13854 transitions. [2021-07-13 20:09:00,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 13854 transitions. [2021-07-13 20:09:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:00,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:00,339 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:00,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:00,539 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1883006847, now seen corresponding path program 72 times [2021-07-13 20:09:00,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:00,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123799067] [2021-07-13 20:09:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:00,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:00,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123799067] [2021-07-13 20:09:00,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123799067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:00,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166766428] [2021-07-13 20:09:00,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:09:00,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:09:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:00,827 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 7 [2021-07-13 20:09:00,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:00,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:00,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:00,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:00,878 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 11 treesize of output 7 [2021-07-13 20:09:00,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:00,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:00,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:00,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:01,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166766428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:01,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:01,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:01,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067287440] [2021-07-13 20:09:01,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:01,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:01,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:01,040 INFO L87 Difference]: Start difference. First operand 4633 states and 13854 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:02,003 INFO L93 Difference]: Finished difference Result 5617 states and 16669 transitions. [2021-07-13 20:09:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:09:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:02,013 INFO L225 Difference]: With dead ends: 5617 [2021-07-13 20:09:02,013 INFO L226 Difference]: Without dead ends: 5431 [2021-07-13 20:09:02,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-07-13 20:09:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4629. [2021-07-13 20:09:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.99114088159032) internal successors, (13843), 4628 states have internal predecessors, (13843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13843 transitions. [2021-07-13 20:09:02,084 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13843 transitions. Word has length 42 [2021-07-13 20:09:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:02,084 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 13843 transitions. [2021-07-13 20:09:02,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13843 transitions. [2021-07-13 20:09:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:02,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:02,090 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:02,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:09:02,291 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash -931803267, now seen corresponding path program 73 times [2021-07-13 20:09:02,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:02,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805123584] [2021-07-13 20:09:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:02,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805123584] [2021-07-13 20:09:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805123584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009487350] [2021-07-13 20:09:02,474 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 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 [2021-07-13 20:09:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:02,581 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 11 treesize of output 7 [2021-07-13 20:09:02,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:02,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:02,633 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 11 treesize of output 7 [2021-07-13 20:09:02,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:02,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:02,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009487350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:02,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:02,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:02,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624722064] [2021-07-13 20:09:02,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:02,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:02,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:02,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:02,799 INFO L87 Difference]: Start difference. First operand 4629 states and 13843 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:03,641 INFO L93 Difference]: Finished difference Result 5508 states and 16359 transitions. [2021-07-13 20:09:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:09:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:03,651 INFO L225 Difference]: With dead ends: 5508 [2021-07-13 20:09:03,651 INFO L226 Difference]: Without dead ends: 5322 [2021-07-13 20:09:03,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 732.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2021-07-13 20:09:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 4625. [2021-07-13 20:09:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.991349480968858) internal successors, (13832), 4624 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13832 transitions. [2021-07-13 20:09:03,720 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13832 transitions. Word has length 42 [2021-07-13 20:09:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:03,720 INFO L482 AbstractCegarLoop]: Abstraction has 4625 states and 13832 transitions. [2021-07-13 20:09:03,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13832 transitions. [2021-07-13 20:09:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:03,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:03,726 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:03,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:03,926 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash -78523647, now seen corresponding path program 74 times [2021-07-13 20:09:03,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:03,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727147993] [2021-07-13 20:09:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:04,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:04,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727147993] [2021-07-13 20:09:04,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727147993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587920297] [2021-07-13 20:09:04,099 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 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 [2021-07-13 20:09:04,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:04,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:04,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:04,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:04,209 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 11 treesize of output 7 [2021-07-13 20:09:04,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:04,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:04,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:04,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:09:04,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:04,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:04,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:04,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:04,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587920297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:04,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:04,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284163393] [2021-07-13 20:09:04,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:04,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:04,424 INFO L87 Difference]: Start difference. First operand 4625 states and 13832 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:05,423 INFO L93 Difference]: Finished difference Result 5207 states and 15310 transitions. [2021-07-13 20:09:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:09:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:09:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:05,431 INFO L225 Difference]: With dead ends: 5207 [2021-07-13 20:09:05,431 INFO L226 Difference]: Without dead ends: 4986 [2021-07-13 20:09:05,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 821.7ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2021-07-13 20:09:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 4637. [2021-07-13 20:09:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.993313201035375) internal successors, (13877), 4636 states have internal predecessors, (13877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13877 transitions. [2021-07-13 20:09:05,494 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13877 transitions. Word has length 42 [2021-07-13 20:09:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:05,494 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13877 transitions. [2021-07-13 20:09:05,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13877 transitions. [2021-07-13 20:09:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:05,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:05,500 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:05,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:05,701 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash -785104611, now seen corresponding path program 75 times [2021-07-13 20:09:05,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:05,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582437587] [2021-07-13 20:09:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:05,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:05,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582437587] [2021-07-13 20:09:05,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582437587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:05,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889102878] [2021-07-13 20:09:05,878 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 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 [2021-07-13 20:09:05,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:09:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:05,995 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 7 [2021-07-13 20:09:05,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:06,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:06,071 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 11 treesize of output 7 [2021-07-13 20:09:06,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:06,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:06,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889102878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:06,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:06,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:06,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36777007] [2021-07-13 20:09:06,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:06,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:06,219 INFO L87 Difference]: Start difference. First operand 4637 states and 13877 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:07,337 INFO L93 Difference]: Finished difference Result 5669 states and 16606 transitions. [2021-07-13 20:09:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:09:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:09:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:07,346 INFO L225 Difference]: With dead ends: 5669 [2021-07-13 20:09:07,346 INFO L226 Difference]: Without dead ends: 5448 [2021-07-13 20:09:07,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 842.0ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2021-07-13 20:09:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4641. [2021-07-13 20:09:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9931034482758623) internal successors, (13888), 4640 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13888 transitions. [2021-07-13 20:09:07,413 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13888 transitions. Word has length 42 [2021-07-13 20:09:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:07,414 INFO L482 AbstractCegarLoop]: Abstraction has 4641 states and 13888 transitions. [2021-07-13 20:09:07,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13888 transitions. [2021-07-13 20:09:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:07,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:07,420 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:07,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:07,625 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 808995585, now seen corresponding path program 76 times [2021-07-13 20:09:07,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:07,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518094446] [2021-07-13 20:09:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:07,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518094446] [2021-07-13 20:09:07,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518094446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736100834] [2021-07-13 20:09:07,804 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 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 [2021-07-13 20:09:07,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:07,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:07,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:07,911 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 11 treesize of output 7 [2021-07-13 20:09:07,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:07,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:07,989 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 11 treesize of output 7 [2021-07-13 20:09:07,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:07,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:08,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736100834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:08,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:08,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:08,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424572181] [2021-07-13 20:09:08,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:08,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:08,125 INFO L87 Difference]: Start difference. First operand 4641 states and 13888 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:09,342 INFO L93 Difference]: Finished difference Result 6063 states and 17768 transitions. [2021-07-13 20:09:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:09:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:09:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:09,352 INFO L225 Difference]: With dead ends: 6063 [2021-07-13 20:09:09,352 INFO L226 Difference]: Without dead ends: 5877 [2021-07-13 20:09:09,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 898.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:09:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-07-13 20:09:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 4598. [2021-07-13 20:09:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.993038938438112) internal successors, (13759), 4597 states have internal predecessors, (13759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13759 transitions. [2021-07-13 20:09:09,421 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13759 transitions. Word has length 42 [2021-07-13 20:09:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:09,421 INFO L482 AbstractCegarLoop]: Abstraction has 4598 states and 13759 transitions. [2021-07-13 20:09:09,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13759 transitions. [2021-07-13 20:09:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:09,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:09,427 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:09,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:09,627 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash -785658301, now seen corresponding path program 77 times [2021-07-13 20:09:09,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:09,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168529888] [2021-07-13 20:09:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:09,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:09,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168529888] [2021-07-13 20:09:09,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168529888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:09,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574370459] [2021-07-13 20:09:09,804 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 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 [2021-07-13 20:09:09,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:09:09,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:09:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:09,962 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 11 treesize of output 7 [2021-07-13 20:09:09,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:09,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:09,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:09,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:10,009 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 11 treesize of output 7 [2021-07-13 20:09:10,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:10,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:10,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:10,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:10,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574370459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:10,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:10,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:09:10,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668193803] [2021-07-13 20:09:10,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:09:10,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:10,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:09:10,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:10,162 INFO L87 Difference]: Start difference. First operand 4598 states and 13759 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2021-07-13 20:09:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:11,025 INFO L93 Difference]: Finished difference Result 5831 states and 17005 transitions. [2021-07-13 20:09:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:09:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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 42 [2021-07-13 20:09:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:11,034 INFO L225 Difference]: With dead ends: 5831 [2021-07-13 20:09:11,035 INFO L226 Difference]: Without dead ends: 5580 [2021-07-13 20:09:11,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 785.4ms TimeCoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:09:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-07-13 20:09:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 4646. [2021-07-13 20:09:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 2.9909580193756726) internal successors, (13893), 4645 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 13893 transitions. [2021-07-13 20:09:11,098 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 13893 transitions. Word has length 42 [2021-07-13 20:09:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:11,098 INFO L482 AbstractCegarLoop]: Abstraction has 4646 states and 13893 transitions. [2021-07-13 20:09:11,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2021-07-13 20:09:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 13893 transitions. [2021-07-13 20:09:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:11,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:11,104 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:11,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:11,304 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 77454783, now seen corresponding path program 78 times [2021-07-13 20:09:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120496458] [2021-07-13 20:09:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:11,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120496458] [2021-07-13 20:09:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120496458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281764383] [2021-07-13 20:09:11,486 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 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 [2021-07-13 20:09:11,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:09:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:09:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:11,619 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 7 [2021-07-13 20:09:11,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:11,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:11,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:11,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:09:11,687 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 11 treesize of output 7 [2021-07-13 20:09:11,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:11,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:11,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:11,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:11,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281764383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:11,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:11,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:11,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077103539] [2021-07-13 20:09:11,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:11,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:11,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:11,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:11,800 INFO L87 Difference]: Start difference. First operand 4646 states and 13893 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) [2021-07-13 20:09:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:12,622 INFO L93 Difference]: Finished difference Result 6026 states and 17387 transitions. [2021-07-13 20:09:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:09:12,622 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 42 [2021-07-13 20:09:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:12,632 INFO L225 Difference]: With dead ends: 6026 [2021-07-13 20:09:12,632 INFO L226 Difference]: Without dead ends: 5805 [2021-07-13 20:09:12,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:09:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2021-07-13 20:09:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 4649. [2021-07-13 20:09:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.991394148020654) internal successors, (13904), 4648 states have internal predecessors, (13904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13904 transitions. [2021-07-13 20:09:12,707 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13904 transitions. Word has length 42 [2021-07-13 20:09:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:12,707 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13904 transitions. [2021-07-13 20:09:12,707 INFO L483 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) [2021-07-13 20:09:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13904 transitions. [2021-07-13 20:09:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:12,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:12,714 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:12,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:12,914 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:12,915 INFO L82 PathProgramCache]: Analyzing trace with hash -951665035, now seen corresponding path program 79 times [2021-07-13 20:09:12,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:12,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831856224] [2021-07-13 20:09:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:13,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:13,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831856224] [2021-07-13 20:09:13,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831856224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:13,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557835008] [2021-07-13 20:09:13,091 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 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 [2021-07-13 20:09:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:13,225 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 11 treesize of output 7 [2021-07-13 20:09:13,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:13,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:13,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:13,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:13,292 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 11 treesize of output 7 [2021-07-13 20:09:13,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:13,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:13,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:13,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:13,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557835008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:13,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:13,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:13,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267128907] [2021-07-13 20:09:13,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:13,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:13,424 INFO L87 Difference]: Start difference. First operand 4649 states and 13904 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) [2021-07-13 20:09:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:14,580 INFO L93 Difference]: Finished difference Result 6308 states and 18158 transitions. [2021-07-13 20:09:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:09:14,580 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 42 [2021-07-13 20:09:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:14,590 INFO L225 Difference]: With dead ends: 6308 [2021-07-13 20:09:14,590 INFO L226 Difference]: Without dead ends: 6087 [2021-07-13 20:09:14,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 823.9ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:09:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6087 states. [2021-07-13 20:09:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6087 to 4661. [2021-07-13 20:09:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.9933476394849787) internal successors, (13949), 4660 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13949 transitions. [2021-07-13 20:09:14,660 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13949 transitions. Word has length 42 [2021-07-13 20:09:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:14,660 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 13949 transitions. [2021-07-13 20:09:14,660 INFO L483 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) [2021-07-13 20:09:14,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13949 transitions. [2021-07-13 20:09:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:14,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:14,666 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:14,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:14,867 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1658245999, now seen corresponding path program 80 times [2021-07-13 20:09:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:14,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965550806] [2021-07-13 20:09:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:15,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:15,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965550806] [2021-07-13 20:09:15,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965550806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:15,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59870096] [2021-07-13 20:09:15,037 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 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 [2021-07-13 20:09:15,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:15,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:15,200 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 7 [2021-07-13 20:09:15,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:15,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:15,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:15,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:09:15,248 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 11 treesize of output 7 [2021-07-13 20:09:15,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:15,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:15,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:15,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:15,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59870096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:15,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:15,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:15,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406558359] [2021-07-13 20:09:15,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:15,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:15,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:15,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:15,382 INFO L87 Difference]: Start difference. First operand 4661 states and 13949 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) [2021-07-13 20:09:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:16,508 INFO L93 Difference]: Finished difference Result 6584 states and 19051 transitions. [2021-07-13 20:09:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:09:16,509 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 42 [2021-07-13 20:09:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:16,520 INFO L225 Difference]: With dead ends: 6584 [2021-07-13 20:09:16,520 INFO L226 Difference]: Without dead ends: 6363 [2021-07-13 20:09:16,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 835.2ms TimeCoverageRelationStatistics Valid=229, Invalid=2123, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:09:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2021-07-13 20:09:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 4665. [2021-07-13 20:09:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.993138936535163) internal successors, (13960), 4664 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13960 transitions. [2021-07-13 20:09:16,593 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13960 transitions. Word has length 42 [2021-07-13 20:09:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:16,593 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 13960 transitions. [2021-07-13 20:09:16,593 INFO L483 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) [2021-07-13 20:09:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13960 transitions. [2021-07-13 20:09:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:16,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:16,599 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:16,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:09:16,800 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash -64145803, now seen corresponding path program 81 times [2021-07-13 20:09:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:16,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902286346] [2021-07-13 20:09:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:16,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:16,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902286346] [2021-07-13 20:09:16,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902286346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:16,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660305034] [2021-07-13 20:09:16,976 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 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 [2021-07-13 20:09:17,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:09:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:17,111 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 7 [2021-07-13 20:09:17,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:17,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:17,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:17,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:09:17,158 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 11 treesize of output 7 [2021-07-13 20:09:17,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:17,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:17,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:17,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:17,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660305034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:17,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:17,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:17,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363425663] [2021-07-13 20:09:17,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:17,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:17,290 INFO L87 Difference]: Start difference. First operand 4665 states and 13960 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) [2021-07-13 20:09:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:18,584 INFO L93 Difference]: Finished difference Result 7279 states and 21049 transitions. [2021-07-13 20:09:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:09:18,584 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 42 [2021-07-13 20:09:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:18,597 INFO L225 Difference]: With dead ends: 7279 [2021-07-13 20:09:18,597 INFO L226 Difference]: Without dead ends: 7093 [2021-07-13 20:09:18,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 885.9ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:09:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7093 states. [2021-07-13 20:09:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7093 to 4634. [2021-07-13 20:09:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 4633 states have (on average 2.989207856680337) internal successors, (13849), 4633 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 13849 transitions. [2021-07-13 20:09:18,676 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 13849 transitions. Word has length 42 [2021-07-13 20:09:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:18,676 INFO L482 AbstractCegarLoop]: Abstraction has 4634 states and 13849 transitions. [2021-07-13 20:09:18,676 INFO L483 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) [2021-07-13 20:09:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 13849 transitions. [2021-07-13 20:09:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:18,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:18,682 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:18,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:18,882 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1257625341, now seen corresponding path program 82 times [2021-07-13 20:09:18,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:18,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676921067] [2021-07-13 20:09:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:19,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:19,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676921067] [2021-07-13 20:09:19,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676921067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:19,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580503218] [2021-07-13 20:09:19,092 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 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 [2021-07-13 20:09:19,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:19,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:19,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:19,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:19,225 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 11 treesize of output 7 [2021-07-13 20:09:19,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:19,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:19,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:19,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:19,352 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 11 treesize of output 7 [2021-07-13 20:09:19,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:19,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:19,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:19,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:19,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580503218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:19,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:19,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:19,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278553823] [2021-07-13 20:09:19,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:19,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:19,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:19,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:19,545 INFO L87 Difference]: Start difference. First operand 4634 states and 13849 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) [2021-07-13 20:09:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:20,437 INFO L93 Difference]: Finished difference Result 5183 states and 15217 transitions. [2021-07-13 20:09:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:09:20,438 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 42 [2021-07-13 20:09:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:20,446 INFO L225 Difference]: With dead ends: 5183 [2021-07-13 20:09:20,446 INFO L226 Difference]: Without dead ends: 4962 [2021-07-13 20:09:20,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 796.9ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-07-13 20:09:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 4640. [2021-07-13 20:09:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4639 states have (on average 2.989437378745419) internal successors, (13868), 4639 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 13868 transitions. [2021-07-13 20:09:20,514 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 13868 transitions. Word has length 42 [2021-07-13 20:09:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:20,514 INFO L482 AbstractCegarLoop]: Abstraction has 4640 states and 13868 transitions. [2021-07-13 20:09:20,514 INFO L483 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) [2021-07-13 20:09:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 13868 transitions. [2021-07-13 20:09:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:20,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:20,520 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:20,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:09:20,724 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:20,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2008222137, now seen corresponding path program 83 times [2021-07-13 20:09:20,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:20,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076753617] [2021-07-13 20:09:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:20,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:20,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076753617] [2021-07-13 20:09:20,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076753617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:20,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346450423] [2021-07-13 20:09:20,906 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:20,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:20,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:20,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:20,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:21,015 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 7 [2021-07-13 20:09:21,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:21,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:21,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:21,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:21,108 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 11 treesize of output 7 [2021-07-13 20:09:21,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:21,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:21,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:21,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:21,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346450423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:21,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:21,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:09:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227766808] [2021-07-13 20:09:21,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:09:21,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:09:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:21,285 INFO L87 Difference]: Start difference. First operand 4640 states and 13868 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2021-07-13 20:09:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:22,371 INFO L93 Difference]: Finished difference Result 5547 states and 16127 transitions. [2021-07-13 20:09:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:09:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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 42 [2021-07-13 20:09:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:22,380 INFO L225 Difference]: With dead ends: 5547 [2021-07-13 20:09:22,380 INFO L226 Difference]: Without dead ends: 5326 [2021-07-13 20:09:22,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 893.1ms TimeCoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:09:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-07-13 20:09:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4652. [2021-07-13 20:09:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9913996989894645) internal successors, (13913), 4651 states have internal predecessors, (13913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13913 transitions. [2021-07-13 20:09:22,447 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13913 transitions. Word has length 42 [2021-07-13 20:09:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:22,448 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 13913 transitions. [2021-07-13 20:09:22,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2021-07-13 20:09:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13913 transitions. [2021-07-13 20:09:22,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:22,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:22,453 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:22,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:22,657 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:22,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1301641173, now seen corresponding path program 84 times [2021-07-13 20:09:22,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:22,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075871461] [2021-07-13 20:09:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:22,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:22,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075871461] [2021-07-13 20:09:22,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075871461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:22,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503778239] [2021-07-13 20:09:22,835 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:22,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:09:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:22,942 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 7 [2021-07-13 20:09:22,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:22,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:22,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:22,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:23,064 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 11 treesize of output 7 [2021-07-13 20:09:23,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:23,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:23,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:23,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503778239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:23,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:23,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814097737] [2021-07-13 20:09:23,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:23,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:23,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:23,197 INFO L87 Difference]: Start difference. First operand 4652 states and 13913 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) [2021-07-13 20:09:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:24,224 INFO L93 Difference]: Finished difference Result 5718 states and 16727 transitions. [2021-07-13 20:09:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:09:24,224 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 42 [2021-07-13 20:09:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:24,233 INFO L225 Difference]: With dead ends: 5718 [2021-07-13 20:09:24,233 INFO L226 Difference]: Without dead ends: 5497 [2021-07-13 20:09:24,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 848.8ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5497 states. [2021-07-13 20:09:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5497 to 4656. [2021-07-13 20:09:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 2.9911922663802364) internal successors, (13924), 4655 states have internal predecessors, (13924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 13924 transitions. [2021-07-13 20:09:24,299 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 13924 transitions. Word has length 42 [2021-07-13 20:09:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:24,299 INFO L482 AbstractCegarLoop]: Abstraction has 4656 states and 13924 transitions. [2021-07-13 20:09:24,300 INFO L483 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) [2021-07-13 20:09:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 13924 transitions. [2021-07-13 20:09:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:24,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:24,305 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:24,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:24,506 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1399225927, now seen corresponding path program 85 times [2021-07-13 20:09:24,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:24,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708107458] [2021-07-13 20:09:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:24,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:24,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708107458] [2021-07-13 20:09:24,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708107458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:24,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739522636] [2021-07-13 20:09:24,679 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:24,785 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 11 treesize of output 7 [2021-07-13 20:09:24,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:24,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:24,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:24,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:24,885 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 11 treesize of output 7 [2021-07-13 20:09:24,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:24,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:24,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:24,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:25,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739522636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:25,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:25,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:25,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248795259] [2021-07-13 20:09:25,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:25,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:25,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:25,046 INFO L87 Difference]: Start difference. First operand 4656 states and 13924 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) [2021-07-13 20:09:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:26,241 INFO L93 Difference]: Finished difference Result 6156 states and 18018 transitions. [2021-07-13 20:09:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:09:26,242 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 42 [2021-07-13 20:09:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:26,252 INFO L225 Difference]: With dead ends: 6156 [2021-07-13 20:09:26,252 INFO L226 Difference]: Without dead ends: 5970 [2021-07-13 20:09:26,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:09:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5970 states. [2021-07-13 20:09:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5970 to 4637. [2021-07-13 20:09:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.98899913718723) internal successors, (13857), 4636 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13857 transitions. [2021-07-13 20:09:26,325 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13857 transitions. Word has length 42 [2021-07-13 20:09:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:26,325 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13857 transitions. [2021-07-13 20:09:26,325 INFO L483 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) [2021-07-13 20:09:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13857 transitions. [2021-07-13 20:09:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:26,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:26,331 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:26,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:26,531 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1234782531, now seen corresponding path program 86 times [2021-07-13 20:09:26,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:26,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220041096] [2021-07-13 20:09:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:26,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:26,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220041096] [2021-07-13 20:09:26,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220041096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:26,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896299754] [2021-07-13 20:09:26,728 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:26,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:26,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:26,834 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 7 [2021-07-13 20:09:26,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:26,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:26,885 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 11 treesize of output 7 [2021-07-13 20:09:26,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:26,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:27,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896299754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:27,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:27,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:27,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800893339] [2021-07-13 20:09:27,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:27,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:27,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:27,049 INFO L87 Difference]: Start difference. First operand 4637 states and 13857 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) [2021-07-13 20:09:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:27,879 INFO L93 Difference]: Finished difference Result 5275 states and 15621 transitions. [2021-07-13 20:09:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:27,879 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 42 [2021-07-13 20:09:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:27,888 INFO L225 Difference]: With dead ends: 5275 [2021-07-13 20:09:27,888 INFO L226 Difference]: Without dead ends: 5054 [2021-07-13 20:09:27,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-07-13 20:09:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 4657. [2021-07-13 20:09:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.9879725085910653) internal successors, (13912), 4656 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 13912 transitions. [2021-07-13 20:09:27,955 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 13912 transitions. Word has length 42 [2021-07-13 20:09:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:27,955 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 13912 transitions. [2021-07-13 20:09:27,956 INFO L483 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) [2021-07-13 20:09:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 13912 transitions. [2021-07-13 20:09:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:27,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:27,961 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:28,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:28,162 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1466084569, now seen corresponding path program 87 times [2021-07-13 20:09:28,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:28,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92272218] [2021-07-13 20:09:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:28,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:28,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92272218] [2021-07-13 20:09:28,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92272218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:28,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074059680] [2021-07-13 20:09:28,332 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:28,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:09:28,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:28,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:28,462 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 7 [2021-07-13 20:09:28,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:28,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:28,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:28,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:28,511 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 11 treesize of output 7 [2021-07-13 20:09:28,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:28,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:28,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:28,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:28,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074059680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:28,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:28,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:28,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256536585] [2021-07-13 20:09:28,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:28,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:28,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:28,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:28,670 INFO L87 Difference]: Start difference. First operand 4657 states and 13912 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) [2021-07-13 20:09:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:29,548 INFO L93 Difference]: Finished difference Result 5641 states and 16727 transitions. [2021-07-13 20:09:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:29,549 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 42 [2021-07-13 20:09:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:29,559 INFO L225 Difference]: With dead ends: 5641 [2021-07-13 20:09:29,559 INFO L226 Difference]: Without dead ends: 5455 [2021-07-13 20:09:29,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2021-07-13 20:09:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 4653. [2021-07-13 20:09:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.988177128116939) internal successors, (13901), 4652 states have internal predecessors, (13901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13901 transitions. [2021-07-13 20:09:29,635 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13901 transitions. Word has length 42 [2021-07-13 20:09:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:29,635 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 13901 transitions. [2021-07-13 20:09:29,635 INFO L483 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) [2021-07-13 20:09:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13901 transitions. [2021-07-13 20:09:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:29,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:29,642 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:29,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 20:09:29,843 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash 14072613, now seen corresponding path program 88 times [2021-07-13 20:09:29,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:29,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661658133] [2021-07-13 20:09:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:30,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661658133] [2021-07-13 20:09:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661658133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139251895] [2021-07-13 20:09:30,020 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:30,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:30,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:30,152 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 11 treesize of output 7 [2021-07-13 20:09:30,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:30,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:30,203 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 11 treesize of output 7 [2021-07-13 20:09:30,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:30,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:30,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139251895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:30,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:30,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:30,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440359057] [2021-07-13 20:09:30,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:30,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:30,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:30,371 INFO L87 Difference]: Start difference. First operand 4653 states and 13901 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) [2021-07-13 20:09:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:31,172 INFO L93 Difference]: Finished difference Result 5532 states and 16417 transitions. [2021-07-13 20:09:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:31,172 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 42 [2021-07-13 20:09:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:31,181 INFO L225 Difference]: With dead ends: 5532 [2021-07-13 20:09:31,182 INFO L226 Difference]: Without dead ends: 5346 [2021-07-13 20:09:31,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 721.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-07-13 20:09:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4649. [2021-07-13 20:09:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.988382099827883) internal successors, (13890), 4648 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13890 transitions. [2021-07-13 20:09:31,252 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13890 transitions. Word has length 42 [2021-07-13 20:09:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:31,253 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13890 transitions. [2021-07-13 20:09:31,253 INFO L483 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) [2021-07-13 20:09:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13890 transitions. [2021-07-13 20:09:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:31,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:31,259 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:31,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:31,459 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash 867352233, now seen corresponding path program 89 times [2021-07-13 20:09:31,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:31,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092872276] [2021-07-13 20:09:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:31,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:31,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092872276] [2021-07-13 20:09:31,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092872276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:31,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557318544] [2021-07-13 20:09:31,635 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:31,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:31,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:31,742 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 7 [2021-07-13 20:09:31,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:31,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:31,838 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 11 treesize of output 7 [2021-07-13 20:09:31,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:31,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:32,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557318544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:32,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:32,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:09:32,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455276741] [2021-07-13 20:09:32,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:09:32,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:32,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:09:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:32,016 INFO L87 Difference]: Start difference. First operand 4649 states and 13890 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2021-07-13 20:09:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:33,066 INFO L93 Difference]: Finished difference Result 5231 states and 15368 transitions. [2021-07-13 20:09:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:09:33,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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 42 [2021-07-13 20:09:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:33,076 INFO L225 Difference]: With dead ends: 5231 [2021-07-13 20:09:33,076 INFO L226 Difference]: Without dead ends: 5010 [2021-07-13 20:09:33,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 911.9ms TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:09:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2021-07-13 20:09:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 4661. [2021-07-13 20:09:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.990343347639485) internal successors, (13935), 4660 states have internal predecessors, (13935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13935 transitions. [2021-07-13 20:09:33,151 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13935 transitions. Word has length 42 [2021-07-13 20:09:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:33,151 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 13935 transitions. [2021-07-13 20:09:33,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2021-07-13 20:09:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13935 transitions. [2021-07-13 20:09:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:33,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:33,158 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:33,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 20:09:33,358 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash 160771269, now seen corresponding path program 90 times [2021-07-13 20:09:33,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:33,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064352597] [2021-07-13 20:09:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:33,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:33,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064352597] [2021-07-13 20:09:33,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064352597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:33,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553542102] [2021-07-13 20:09:33,570 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:33,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:09:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:33,683 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 7 [2021-07-13 20:09:33,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:33,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:33,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:09:33,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:33,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:33,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553542102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:33,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:33,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:33,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596271604] [2021-07-13 20:09:33,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:33,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:33,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:33,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:33,946 INFO L87 Difference]: Start difference. First operand 4661 states and 13935 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) [2021-07-13 20:09:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:34,893 INFO L93 Difference]: Finished difference Result 5693 states and 16664 transitions. [2021-07-13 20:09:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:09:34,893 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 42 [2021-07-13 20:09:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:34,902 INFO L225 Difference]: With dead ends: 5693 [2021-07-13 20:09:34,903 INFO L226 Difference]: Without dead ends: 5472 [2021-07-13 20:09:34,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-07-13 20:09:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 4665. [2021-07-13 20:09:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.990137221269297) internal successors, (13946), 4664 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13946 transitions. [2021-07-13 20:09:34,973 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13946 transitions. Word has length 42 [2021-07-13 20:09:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:34,973 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 13946 transitions. [2021-07-13 20:09:34,973 INFO L483 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) [2021-07-13 20:09:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13946 transitions. [2021-07-13 20:09:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:34,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:34,979 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:35,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:35,180 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:35,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1754871465, now seen corresponding path program 91 times [2021-07-13 20:09:35,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:35,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347724292] [2021-07-13 20:09:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:35,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:35,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347724292] [2021-07-13 20:09:35,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347724292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:35,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111689275] [2021-07-13 20:09:35,352 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:35,461 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 11 treesize of output 7 [2021-07-13 20:09:35,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:35,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:35,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:35,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:35,565 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 11 treesize of output 7 [2021-07-13 20:09:35,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:35,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:35,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:35,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:09:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:35,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111689275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:35,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:35,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:35,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006650666] [2021-07-13 20:09:35,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:35,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:35,727 INFO L87 Difference]: Start difference. First operand 4665 states and 13946 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) [2021-07-13 20:09:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:36,962 INFO L93 Difference]: Finished difference Result 6087 states and 17826 transitions. [2021-07-13 20:09:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:09:36,962 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 42 [2021-07-13 20:09:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:36,973 INFO L225 Difference]: With dead ends: 6087 [2021-07-13 20:09:36,973 INFO L226 Difference]: Without dead ends: 5901 [2021-07-13 20:09:36,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:09:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-07-13 20:09:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4610. [2021-07-13 20:09:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.99153829464092) internal successors, (13788), 4609 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13788 transitions. [2021-07-13 20:09:37,050 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13788 transitions. Word has length 42 [2021-07-13 20:09:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:37,050 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 13788 transitions. [2021-07-13 20:09:37,050 INFO L483 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) [2021-07-13 20:09:37,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13788 transitions. [2021-07-13 20:09:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:37,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:37,056 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:37,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:37,259 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1792177991, now seen corresponding path program 92 times [2021-07-13 20:09:37,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:37,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193838424] [2021-07-13 20:09:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:37,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:37,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193838424] [2021-07-13 20:09:37,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193838424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:37,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095394676] [2021-07-13 20:09:37,490 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:37,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:37,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:37,639 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 7 [2021-07-13 20:09:37,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:37,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:37,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:37,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:37,692 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 11 treesize of output 7 [2021-07-13 20:09:37,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:37,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:37,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:37,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:37,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095394676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:37,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:37,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:37,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187151582] [2021-07-13 20:09:37,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:37,849 INFO L87 Difference]: Start difference. First operand 4610 states and 13788 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) [2021-07-13 20:09:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:38,830 INFO L93 Difference]: Finished difference Result 5783 states and 16868 transitions. [2021-07-13 20:09:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:09:38,830 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 42 [2021-07-13 20:09:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:38,839 INFO L225 Difference]: With dead ends: 5783 [2021-07-13 20:09:38,840 INFO L226 Difference]: Without dead ends: 5532 [2021-07-13 20:09:38,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:38,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-07-13 20:09:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4598. [2021-07-13 20:09:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.9923863389166847) internal successors, (13756), 4597 states have internal predecessors, (13756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13756 transitions. [2021-07-13 20:09:38,911 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13756 transitions. Word has length 42 [2021-07-13 20:09:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:38,911 INFO L482 AbstractCegarLoop]: Abstraction has 4598 states and 13756 transitions. [2021-07-13 20:09:38,911 INFO L483 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) [2021-07-13 20:09:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13756 transitions. [2021-07-13 20:09:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:38,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:38,917 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:39,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 20:09:39,118 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash -929064907, now seen corresponding path program 93 times [2021-07-13 20:09:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:39,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399991444] [2021-07-13 20:09:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:39,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:39,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399991444] [2021-07-13 20:09:39,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399991444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:39,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110375498] [2021-07-13 20:09:39,324 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:39,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:09:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:09:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:39,451 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 7 [2021-07-13 20:09:39,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:39,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:39,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:39,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:39,544 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 11 treesize of output 7 [2021-07-13 20:09:39,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:39,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:39,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:39,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110375498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:39,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:39,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925055909] [2021-07-13 20:09:39,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:39,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:39,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:39,685 INFO L87 Difference]: Start difference. First operand 4598 states and 13756 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) [2021-07-13 20:09:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:40,666 INFO L93 Difference]: Finished difference Result 5975 states and 17242 transitions. [2021-07-13 20:09:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:09:40,667 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 42 [2021-07-13 20:09:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:40,677 INFO L225 Difference]: With dead ends: 5975 [2021-07-13 20:09:40,677 INFO L226 Difference]: Without dead ends: 5754 [2021-07-13 20:09:40,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 810.0ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5754 states. [2021-07-13 20:09:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5754 to 4601. [2021-07-13 20:09:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4600 states have (on average 2.9928260869565215) internal successors, (13767), 4600 states have internal predecessors, (13767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 13767 transitions. [2021-07-13 20:09:40,753 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 13767 transitions. Word has length 42 [2021-07-13 20:09:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:40,754 INFO L482 AbstractCegarLoop]: Abstraction has 4601 states and 13767 transitions. [2021-07-13 20:09:40,754 INFO L483 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) [2021-07-13 20:09:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 13767 transitions. [2021-07-13 20:09:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:40,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:40,760 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:40,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:09:40,961 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1958184725, now seen corresponding path program 94 times [2021-07-13 20:09:40,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:40,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879047204] [2021-07-13 20:09:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:41,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:41,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879047204] [2021-07-13 20:09:41,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879047204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:41,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34869609] [2021-07-13 20:09:41,197 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:41,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:41,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:41,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:41,343 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 11 treesize of output 7 [2021-07-13 20:09:41,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:41,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:41,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:41,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:41,414 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 11 treesize of output 7 [2021-07-13 20:09:41,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:41,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:41,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:41,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:41,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34869609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:41,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:41,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565984392] [2021-07-13 20:09:41,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:41,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:41,541 INFO L87 Difference]: Start difference. First operand 4601 states and 13767 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) [2021-07-13 20:09:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:42,821 INFO L93 Difference]: Finished difference Result 6245 states and 17980 transitions. [2021-07-13 20:09:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:09:42,821 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 42 [2021-07-13 20:09:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:42,831 INFO L225 Difference]: With dead ends: 6245 [2021-07-13 20:09:42,831 INFO L226 Difference]: Without dead ends: 6024 [2021-07-13 20:09:42,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 913.9ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2021-07-13 20:09:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 4613. [2021-07-13 20:09:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.99479618386817) internal successors, (13812), 4612 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13812 transitions. [2021-07-13 20:09:42,921 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13812 transitions. Word has length 42 [2021-07-13 20:09:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:42,921 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 13812 transitions. [2021-07-13 20:09:42,921 INFO L483 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) [2021-07-13 20:09:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13812 transitions. [2021-07-13 20:09:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:42,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:42,927 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:43,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:43,127 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:43,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1630201607, now seen corresponding path program 95 times [2021-07-13 20:09:43,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:43,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465805586] [2021-07-13 20:09:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:43,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:43,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465805586] [2021-07-13 20:09:43,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465805586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:43,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483818882] [2021-07-13 20:09:43,308 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:43,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:43,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:43,449 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 7 [2021-07-13 20:09:43,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:43,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:43,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:43,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:43,500 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 7 [2021-07-13 20:09:43,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:43,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:43,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:43,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-07-13 20:09:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:43,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483818882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:43,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:43,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:43,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668537404] [2021-07-13 20:09:43,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:43,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:43,648 INFO L87 Difference]: Start difference. First operand 4613 states and 13812 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) [2021-07-13 20:09:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:44,930 INFO L93 Difference]: Finished difference Result 6513 states and 18851 transitions. [2021-07-13 20:09:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:09:44,931 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 42 [2021-07-13 20:09:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:44,941 INFO L225 Difference]: With dead ends: 6513 [2021-07-13 20:09:44,941 INFO L226 Difference]: Without dead ends: 6292 [2021-07-13 20:09:44,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 886.7ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2021-07-13 20:09:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 4617. [2021-07-13 20:09:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.994584055459272) internal successors, (13823), 4616 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13823 transitions. [2021-07-13 20:09:45,011 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13823 transitions. Word has length 42 [2021-07-13 20:09:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:45,011 INFO L482 AbstractCegarLoop]: Abstraction has 4617 states and 13823 transitions. [2021-07-13 20:09:45,011 INFO L483 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) [2021-07-13 20:09:45,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13823 transitions. [2021-07-13 20:09:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:45,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:45,017 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:45,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 20:09:45,217 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:45,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1070665493, now seen corresponding path program 96 times [2021-07-13 20:09:45,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:45,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448544863] [2021-07-13 20:09:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:45,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448544863] [2021-07-13 20:09:45,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448544863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95077340] [2021-07-13 20:09:45,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:45,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:09:45,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:45,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:45,566 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 7 [2021-07-13 20:09:45,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:45,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:45,617 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 11 treesize of output 7 [2021-07-13 20:09:45,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:45,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:45,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95077340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:45,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:45,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:45,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233028675] [2021-07-13 20:09:45,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:45,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:45,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:45,766 INFO L87 Difference]: Start difference. First operand 4617 states and 13823 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) [2021-07-13 20:09:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:47,206 INFO L93 Difference]: Finished difference Result 7204 states and 20838 transitions. [2021-07-13 20:09:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:09:47,206 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 42 [2021-07-13 20:09:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:47,219 INFO L225 Difference]: With dead ends: 7204 [2021-07-13 20:09:47,219 INFO L226 Difference]: Without dead ends: 7018 [2021-07-13 20:09:47,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 973.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:09:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2021-07-13 20:09:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 4586. [2021-07-13 20:09:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.99062159214831) internal successors, (13712), 4585 states have internal predecessors, (13712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13712 transitions. [2021-07-13 20:09:47,301 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13712 transitions. Word has length 42 [2021-07-13 20:09:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:47,301 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13712 transitions. [2021-07-13 20:09:47,301 INFO L483 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) [2021-07-13 20:09:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13712 transitions. [2021-07-13 20:09:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:47,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:47,307 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:47,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 20:09:47,507 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:47,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2030822265, now seen corresponding path program 97 times [2021-07-13 20:09:47,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:47,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287934906] [2021-07-13 20:09:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:47,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287934906] [2021-07-13 20:09:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287934906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002741278] [2021-07-13 20:09:47,683 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:47,791 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 11 treesize of output 7 [2021-07-13 20:09:47,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:47,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:47,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:47,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:47,886 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 11 treesize of output 7 [2021-07-13 20:09:47,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:47,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:47,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:47,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:48,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002741278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:48,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:48,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721155669] [2021-07-13 20:09:48,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:48,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:48,017 INFO L87 Difference]: Start difference. First operand 4586 states and 13712 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) [2021-07-13 20:09:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:48,894 INFO L93 Difference]: Finished difference Result 5117 states and 15032 transitions. [2021-07-13 20:09:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:09:48,894 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 42 [2021-07-13 20:09:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:48,902 INFO L225 Difference]: With dead ends: 5117 [2021-07-13 20:09:48,902 INFO L226 Difference]: Without dead ends: 4896 [2021-07-13 20:09:48,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 765.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2021-07-13 20:09:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 4574. [2021-07-13 20:09:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 2.992127706101028) internal successors, (13683), 4573 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 13683 transitions. [2021-07-13 20:09:48,966 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 13683 transitions. Word has length 42 [2021-07-13 20:09:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:48,966 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 13683 transitions. [2021-07-13 20:09:48,966 INFO L483 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) [2021-07-13 20:09:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 13683 transitions. [2021-07-13 20:09:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:48,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:48,972 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:49,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-13 20:09:49,174 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:49,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1001702447, now seen corresponding path program 98 times [2021-07-13 20:09:49,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:49,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760067485] [2021-07-13 20:09:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:49,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:49,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760067485] [2021-07-13 20:09:49,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760067485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:49,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749754319] [2021-07-13 20:09:49,498 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:49,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:49,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:49,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:49,708 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 11 treesize of output 7 [2021-07-13 20:09:49,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:49,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:49,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:49,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:49,841 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 11 treesize of output 7 [2021-07-13 20:09:49,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:49,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:49,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:49,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:49,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749754319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:49,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:49,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:49,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058024097] [2021-07-13 20:09:49,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:49,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:49,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:49,983 INFO L87 Difference]: Start difference. First operand 4574 states and 13683 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) [2021-07-13 20:09:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:51,064 INFO L93 Difference]: Finished difference Result 5469 states and 15909 transitions. [2021-07-13 20:09:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:09:51,064 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 42 [2021-07-13 20:09:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:51,072 INFO L225 Difference]: With dead ends: 5469 [2021-07-13 20:09:51,072 INFO L226 Difference]: Without dead ends: 5248 [2021-07-13 20:09:51,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1029.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:09:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-07-13 20:09:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 4586. [2021-07-13 20:09:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994111232279171) internal successors, (13728), 4585 states have internal predecessors, (13728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13728 transitions. [2021-07-13 20:09:51,137 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13728 transitions. Word has length 42 [2021-07-13 20:09:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:51,137 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13728 transitions. [2021-07-13 20:09:51,137 INFO L483 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) [2021-07-13 20:09:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13728 transitions. [2021-07-13 20:09:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:51,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:51,143 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:51,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:51,345 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash 295121483, now seen corresponding path program 99 times [2021-07-13 20:09:51,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:51,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24510236] [2021-07-13 20:09:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:51,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:51,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24510236] [2021-07-13 20:09:51,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24510236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:51,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492138719] [2021-07-13 20:09:51,516 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:51,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:09:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:51,623 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 7 [2021-07-13 20:09:51,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:51,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:51,695 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 11 treesize of output 7 [2021-07-13 20:09:51,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:51,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:51,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492138719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:51,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:51,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:51,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427389468] [2021-07-13 20:09:51,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:51,841 INFO L87 Difference]: Start difference. First operand 4586 states and 13728 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) [2021-07-13 20:09:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:52,951 INFO L93 Difference]: Finished difference Result 5632 states and 16487 transitions. [2021-07-13 20:09:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:09:52,951 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 42 [2021-07-13 20:09:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:52,961 INFO L225 Difference]: With dead ends: 5632 [2021-07-13 20:09:52,961 INFO L226 Difference]: Without dead ends: 5411 [2021-07-13 20:09:52,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:09:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-07-13 20:09:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 4590. [2021-07-13 20:09:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4589 states have (on average 2.9938984528219654) internal successors, (13739), 4589 states have internal predecessors, (13739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 13739 transitions. [2021-07-13 20:09:53,027 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 13739 transitions. Word has length 42 [2021-07-13 20:09:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:53,028 INFO L482 AbstractCegarLoop]: Abstraction has 4590 states and 13739 transitions. [2021-07-13 20:09:53,028 INFO L483 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) [2021-07-13 20:09:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 13739 transitions. [2021-07-13 20:09:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:53,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:53,033 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:53,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:09:53,234 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:53,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1889221679, now seen corresponding path program 100 times [2021-07-13 20:09:53,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:53,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382425463] [2021-07-13 20:09:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:53,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:53,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382425463] [2021-07-13 20:09:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382425463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416812838] [2021-07-13 20:09:53,405 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:53,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:53,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:53,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:53,512 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 11 treesize of output 7 [2021-07-13 20:09:53,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:53,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:53,583 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 11 treesize of output 7 [2021-07-13 20:09:53,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:53,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416812838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:53,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:53,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383667661] [2021-07-13 20:09:53,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:53,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:53,731 INFO L87 Difference]: Start difference. First operand 4590 states and 13739 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) [2021-07-13 20:09:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:54,985 INFO L93 Difference]: Finished difference Result 6066 states and 17767 transitions. [2021-07-13 20:09:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:09:54,986 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 42 [2021-07-13 20:09:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:54,995 INFO L225 Difference]: With dead ends: 6066 [2021-07-13 20:09:54,995 INFO L226 Difference]: Without dead ends: 5880 [2021-07-13 20:09:54,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 867.3ms TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:09:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2021-07-13 20:09:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4571. [2021-07-13 20:09:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2021-07-13 20:09:55,071 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2021-07-13 20:09:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:55,071 INFO L482 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2021-07-13 20:09:55,071 INFO L483 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) [2021-07-13 20:09:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2021-07-13 20:09:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:55,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:55,076 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:55,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 20:09:55,277 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:55,277 INFO L82 PathProgramCache]: Analyzing trace with hash 228262841, now seen corresponding path program 101 times [2021-07-13 20:09:55,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:55,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344322980] [2021-07-13 20:09:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:55,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:55,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344322980] [2021-07-13 20:09:55,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344322980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:55,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779498306] [2021-07-13 20:09:55,451 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:55,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:55,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:55,559 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 7 [2021-07-13 20:09:55,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:55,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:55,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:55,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:55,609 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 7 [2021-07-13 20:09:55,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:55,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:55,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:55,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:09:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:55,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779498306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:55,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:55,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:55,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342886529] [2021-07-13 20:09:55,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:55,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:55,787 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 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) [2021-07-13 20:09:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:56,699 INFO L93 Difference]: Finished difference Result 5189 states and 15381 transitions. [2021-07-13 20:09:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:09:56,699 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 42 [2021-07-13 20:09:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:56,708 INFO L225 Difference]: With dead ends: 5189 [2021-07-13 20:09:56,708 INFO L226 Difference]: Without dead ends: 4968 [2021-07-13 20:09:56,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:09:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2021-07-13 20:09:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 4575. [2021-07-13 20:09:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4574 states have (on average 2.991473546130302) internal successors, (13683), 4574 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 13683 transitions. [2021-07-13 20:09:56,782 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 13683 transitions. Word has length 42 [2021-07-13 20:09:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:56,783 INFO L482 AbstractCegarLoop]: Abstraction has 4575 states and 13683 transitions. [2021-07-13 20:09:56,783 INFO L483 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) [2021-07-13 20:09:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 13683 transitions. [2021-07-13 20:09:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:56,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:56,789 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:56,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:09:56,990 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1822363037, now seen corresponding path program 102 times [2021-07-13 20:09:56,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:56,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70968800] [2021-07-13 20:09:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:57,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:57,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70968800] [2021-07-13 20:09:57,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70968800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:57,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320942457] [2021-07-13 20:09:57,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:57,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:09:57,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:57,296 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 7 [2021-07-13 20:09:57,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:57,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:57,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:57,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-07-13 20:09:57,360 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 11 treesize of output 7 [2021-07-13 20:09:57,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:57,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:57,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:57,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:57,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320942457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:57,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:57,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:57,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257990407] [2021-07-13 20:09:57,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:57,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:57,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:57,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:57,551 INFO L87 Difference]: Start difference. First operand 4575 states and 13683 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) [2021-07-13 20:09:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:58,471 INFO L93 Difference]: Finished difference Result 5551 states and 16476 transitions. [2021-07-13 20:09:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:58,471 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 42 [2021-07-13 20:09:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:58,480 INFO L225 Difference]: With dead ends: 5551 [2021-07-13 20:09:58,480 INFO L226 Difference]: Without dead ends: 5365 [2021-07-13 20:09:58,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2021-07-13 20:09:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 4571. [2021-07-13 20:09:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2021-07-13 20:09:58,547 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2021-07-13 20:09:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:58,547 INFO L482 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2021-07-13 20:09:58,547 INFO L483 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) [2021-07-13 20:09:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2021-07-13 20:09:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:09:58,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:58,553 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:09:58,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,753 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:58,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:58,753 INFO L82 PathProgramCache]: Analyzing trace with hash -992447077, now seen corresponding path program 103 times [2021-07-13 20:09:58,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:58,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272212777] [2021-07-13 20:09:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:58,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272212777] [2021-07-13 20:09:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272212777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343166587] [2021-07-13 20:09:58,927 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:59,035 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 11 treesize of output 7 [2021-07-13 20:09:59,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:59,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:09:59,086 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 11 treesize of output 7 [2021-07-13 20:09:59,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:59,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:09:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:59,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343166587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:59,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:59,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:09:59,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360523800] [2021-07-13 20:09:59,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:09:59,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:59,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:09:59,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:09:59,254 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 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) [2021-07-13 20:10:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:00,131 INFO L93 Difference]: Finished difference Result 5442 states and 16166 transitions. [2021-07-13 20:10:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:10:00,132 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 42 [2021-07-13 20:10:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:00,140 INFO L225 Difference]: With dead ends: 5442 [2021-07-13 20:10:00,140 INFO L226 Difference]: Without dead ends: 5256 [2021-07-13 20:10:00,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:10:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-07-13 20:10:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 4559. [2021-07-13 20:10:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 2.9923211935059237) internal successors, (13639), 4558 states have internal predecessors, (13639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 13639 transitions. [2021-07-13 20:10:00,211 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 13639 transitions. Word has length 42 [2021-07-13 20:10:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:00,211 INFO L482 AbstractCegarLoop]: Abstraction has 4559 states and 13639 transitions. [2021-07-13 20:10:00,211 INFO L483 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) [2021-07-13 20:10:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 13639 transitions. [2021-07-13 20:10:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:10:00,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:00,217 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:10:00,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:00,418 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash -139167457, now seen corresponding path program 104 times [2021-07-13 20:10:00,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:00,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019499845] [2021-07-13 20:10:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:00,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019499845] [2021-07-13 20:10:00,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019499845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:00,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362343554] [2021-07-13 20:10:00,620 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:00,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:00,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:10:00,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:00,728 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 11 treesize of output 7 [2021-07-13 20:10:00,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:00,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:00,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:00,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:10:00,820 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 11 treesize of output 7 [2021-07-13 20:10:00,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:00,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:00,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:00,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:10:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:00,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362343554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:00,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:00,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:10:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057813656] [2021-07-13 20:10:00,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:10:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:10:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:10:00,950 INFO L87 Difference]: Start difference. First operand 4559 states and 13639 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) [2021-07-13 20:10:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:02,067 INFO L93 Difference]: Finished difference Result 5072 states and 14919 transitions. [2021-07-13 20:10:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:10:02,067 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 42 [2021-07-13 20:10:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:02,076 INFO L225 Difference]: With dead ends: 5072 [2021-07-13 20:10:02,076 INFO L226 Difference]: Without dead ends: 4851 [2021-07-13 20:10:02,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 862.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:10:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-07-13 20:10:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 4502. [2021-07-13 20:10:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 2.9962230615418797) internal successors, (13486), 4501 states have internal predecessors, (13486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 13486 transitions. [2021-07-13 20:10:02,141 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 13486 transitions. Word has length 42 [2021-07-13 20:10:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:02,141 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 13486 transitions. [2021-07-13 20:10:02,142 INFO L483 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) [2021-07-13 20:10:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 13486 transitions. [2021-07-13 20:10:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:10:02,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:02,148 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:10:02,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:02,349 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash -845748421, now seen corresponding path program 105 times [2021-07-13 20:10:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:02,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198755954] [2021-07-13 20:10:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:02,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198755954] [2021-07-13 20:10:02,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198755954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138276443] [2021-07-13 20:10:02,530 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:02,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:10:02,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:10:02,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:02,649 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 7 [2021-07-13 20:10:02,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:02,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:02,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:02,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:10:02,727 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 11 treesize of output 7 [2021-07-13 20:10:02,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:02,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:02,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:02,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:10:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:02,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138276443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:02,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:02,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:10:02,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410427655] [2021-07-13 20:10:02,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:10:02,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:02,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:10:02,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:10:02,877 INFO L87 Difference]: Start difference. First operand 4502 states and 13486 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) [2021-07-13 20:10:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:03,943 INFO L93 Difference]: Finished difference Result 5470 states and 16035 transitions. [2021-07-13 20:10:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:10:03,943 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 42 [2021-07-13 20:10:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:03,951 INFO L225 Difference]: With dead ends: 5470 [2021-07-13 20:10:03,952 INFO L226 Difference]: Without dead ends: 5249 [2021-07-13 20:10:03,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 863.6ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:10:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-07-13 20:10:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 4474. [2021-07-13 20:10:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 2.9973172367538563) internal successors, (13407), 4473 states have internal predecessors, (13407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 13407 transitions. [2021-07-13 20:10:04,022 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 13407 transitions. Word has length 42 [2021-07-13 20:10:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:04,022 INFO L482 AbstractCegarLoop]: Abstraction has 4474 states and 13407 transitions. [2021-07-13 20:10:04,022 INFO L483 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) [2021-07-13 20:10:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 13407 transitions. [2021-07-13 20:10:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:10:04,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:04,029 INFO L508 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-07-13 20:10:04,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:10:04,229 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash 748351775, now seen corresponding path program 106 times [2021-07-13 20:10:04,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:04,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969731876] [2021-07-13 20:10:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:04,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:04,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969731876] [2021-07-13 20:10:04,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969731876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:04,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952369051] [2021-07-13 20:10:04,440 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:04,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:04,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:04,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:10:04,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:04,546 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 11 treesize of output 7 [2021-07-13 20:10:04,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:04,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-07-13 20:10:04,618 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 11 treesize of output 7 [2021-07-13 20:10:04,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:04,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:10:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:04,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952369051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:04,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:04,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-13 20:10:04,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960905381] [2021-07-13 20:10:04,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:10:04,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:10:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:10:04,765 INFO L87 Difference]: Start difference. First operand 4474 states and 13407 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) [2021-07-13 20:10:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:06,004 INFO L93 Difference]: Finished difference Result 5832 states and 17107 transitions. [2021-07-13 20:10:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:10:06,004 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 42 [2021-07-13 20:10:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:06,014 INFO L225 Difference]: With dead ends: 5832 [2021-07-13 20:10:06,014 INFO L226 Difference]: Without dead ends: 5646 [2021-07-13 20:10:06,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 936.1ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:10:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-07-13 20:10:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 4343. [2021-07-13 20:10:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4342 states have (on average 3.00322432058959) internal successors, (13040), 4342 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 13040 transitions. [2021-07-13 20:10:06,087 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 13040 transitions. Word has length 42 [2021-07-13 20:10:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:06,087 INFO L482 AbstractCegarLoop]: Abstraction has 4343 states and 13040 transitions. [2021-07-13 20:10:06,087 INFO L483 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) [2021-07-13 20:10:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 13040 transitions. [2021-07-13 20:10:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:10:06,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:06,093 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-07-13 20:10:06,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:06,293 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:06,294 INFO L82 PathProgramCache]: Analyzing trace with hash 338450136, now seen corresponding path program 107 times [2021-07-13 20:10:06,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:06,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354683481] [2021-07-13 20:10:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:06,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354683481] [2021-07-13 20:10:06,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354683481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001246913] [2021-07-13 20:10:06,370 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:06,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:10:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:10:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:06,478 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 11 treesize of output 7 [2021-07-13 20:10:06,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:06,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:06,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:06,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:06,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001246913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:06,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:06,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:10:06,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307096165] [2021-07-13 20:10:06,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:10:06,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:10:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:10:06,501 INFO L87 Difference]: Start difference. First operand 4343 states and 13040 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:06,818 INFO L93 Difference]: Finished difference Result 10234 states and 30534 transitions. [2021-07-13 20:10:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:10:06,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:10:06,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:06,837 INFO L225 Difference]: With dead ends: 10234 [2021-07-13 20:10:06,837 INFO L226 Difference]: Without dead ends: 10160 [2021-07-13 20:10:06,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:10:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10160 states. [2021-07-13 20:10:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10160 to 7919. [2021-07-13 20:10:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7919 states, 7918 states have (on average 2.9993685274059105) internal successors, (23749), 7918 states have internal predecessors, (23749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 23749 transitions. [2021-07-13 20:10:06,971 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 23749 transitions. Word has length 45 [2021-07-13 20:10:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:06,971 INFO L482 AbstractCegarLoop]: Abstraction has 7919 states and 23749 transitions. [2021-07-13 20:10:06,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 23749 transitions. [2021-07-13 20:10:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 20:10:06,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:06,982 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-07-13 20:10:07,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:10:07,183 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 660958278, now seen corresponding path program 108 times [2021-07-13 20:10:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:07,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749813768] [2021-07-13 20:10:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:07,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:07,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749813768] [2021-07-13 20:10:07,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749813768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:07,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051965100] [2021-07-13 20:10:07,238 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:07,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:10:07,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:10:07,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:10:07,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051965100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:07,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:07,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:10:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469155187] [2021-07-13 20:10:07,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:10:07,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:10:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:10:07,395 INFO L87 Difference]: Start difference. First operand 7919 states and 23749 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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) [2021-07-13 20:10:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:07,447 INFO L93 Difference]: Finished difference Result 14786 states and 44002 transitions. [2021-07-13 20:10:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:10:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 46 [2021-07-13 20:10:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:07,476 INFO L225 Difference]: With dead ends: 14786 [2021-07-13 20:10:07,476 INFO L226 Difference]: Without dead ends: 14467 [2021-07-13 20:10:07,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:10:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14467 states. [2021-07-13 20:10:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14467 to 10469. [2021-07-13 20:10:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 10468 states have (on average 3.0246465418418036) internal successors, (31662), 10468 states have internal predecessors, (31662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 31662 transitions. [2021-07-13 20:10:07,675 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 31662 transitions. Word has length 46 [2021-07-13 20:10:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:07,675 INFO L482 AbstractCegarLoop]: Abstraction has 10469 states and 31662 transitions. [2021-07-13 20:10:07,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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) [2021-07-13 20:10:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 31662 transitions. [2021-07-13 20:10:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:10:07,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:07,690 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:10:07,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:07,891 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1052219392, now seen corresponding path program 109 times [2021-07-13 20:10:07,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:07,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544561137] [2021-07-13 20:10:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:10:07,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544561137] [2021-07-13 20:10:07,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544561137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552956903] [2021-07-13 20:10:07,962 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:07,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:10:07,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:08,079 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 7 [2021-07-13 20:10:08,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:08,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-07-13 20:10:08,108 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 11 treesize of output 7 [2021-07-13 20:10:08,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:08,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:08,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552956903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:08,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-07-13 20:10:08,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437644919] [2021-07-13 20:10:08,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:10:08,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:10:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:10:08,141 INFO L87 Difference]: Start difference. First operand 10469 states and 31662 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:09,321 INFO L93 Difference]: Finished difference Result 23559 states and 70272 transitions. [2021-07-13 20:10:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:10:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:10:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:09,370 INFO L225 Difference]: With dead ends: 23559 [2021-07-13 20:10:09,370 INFO L226 Difference]: Without dead ends: 23343 [2021-07-13 20:10:09,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=524, Invalid=4306, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:10:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-07-13 20:10:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 15335. [2021-07-13 20:10:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15335 states, 15334 states have (on average 3.039259162645102) internal successors, (46604), 15334 states have internal predecessors, (46604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15335 states to 15335 states and 46604 transitions. [2021-07-13 20:10:09,701 INFO L78 Accepts]: Start accepts. Automaton has 15335 states and 46604 transitions. Word has length 50 [2021-07-13 20:10:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:09,701 INFO L482 AbstractCegarLoop]: Abstraction has 15335 states and 46604 transitions. [2021-07-13 20:10:09,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 15335 states and 46604 transitions. [2021-07-13 20:10:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:10:09,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:09,725 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:10:09,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:09,925 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1305996224, now seen corresponding path program 110 times [2021-07-13 20:10:09,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:09,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189050966] [2021-07-13 20:10:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:10,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:10,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189050966] [2021-07-13 20:10:10,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189050966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927430999] [2021-07-13 20:10:10,054 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:10,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:10,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:10:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:10,264 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:10:10,337 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 7 [2021-07-13 20:10:10,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:10,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:9 [2021-07-13 20:10:10,384 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 11 treesize of output 7 [2021-07-13 20:10:10,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:10,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:10,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927430999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:10,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-13 20:10:10,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932182668] [2021-07-13 20:10:10,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:10:10,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:10,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:10:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:10:10,414 INFO L87 Difference]: Start difference. First operand 15335 states and 46604 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:11,269 INFO L93 Difference]: Finished difference Result 32072 states and 96588 transitions. [2021-07-13 20:10:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:10:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:11,352 INFO L225 Difference]: With dead ends: 32072 [2021-07-13 20:10:11,352 INFO L226 Difference]: Without dead ends: 32072 [2021-07-13 20:10:11,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:10:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32072 states. [2021-07-13 20:10:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32072 to 18125. [2021-07-13 20:10:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18125 states, 18124 states have (on average 3.0475612447583313) internal successors, (55234), 18124 states have internal predecessors, (55234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18125 states to 18125 states and 55234 transitions. [2021-07-13 20:10:11,833 INFO L78 Accepts]: Start accepts. Automaton has 18125 states and 55234 transitions. Word has length 50 [2021-07-13 20:10:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:11,833 INFO L482 AbstractCegarLoop]: Abstraction has 18125 states and 55234 transitions. [2021-07-13 20:10:11,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 18125 states and 55234 transitions. [2021-07-13 20:10:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:10:11,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:11,861 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:10:12,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:12,061 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:12,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1185001304, now seen corresponding path program 111 times [2021-07-13 20:10:12,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:12,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350384599] [2021-07-13 20:10:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:10:12,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:12,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350384599] [2021-07-13 20:10:12,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350384599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:12,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525052968] [2021-07-13 20:10:12,135 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:12,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:10:12,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:10:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:12,217 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 5 treesize of output 3 [2021-07-13 20:10:12,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:12,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:3 [2021-07-13 20:10:12,226 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 11 treesize of output 7 [2021-07-13 20:10:12,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:12,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:12,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525052968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:12,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:12,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-07-13 20:10:12,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103282685] [2021-07-13 20:10:12,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:10:12,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:12,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:10:12,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:10:12,274 INFO L87 Difference]: Start difference. First operand 18125 states and 55234 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:13,266 INFO L93 Difference]: Finished difference Result 46630 states and 139823 transitions. [2021-07-13 20:10:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:10:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:10:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:13,513 INFO L225 Difference]: With dead ends: 46630 [2021-07-13 20:10:13,513 INFO L226 Difference]: Without dead ends: 46558 [2021-07-13 20:10:13,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 517.6ms TimeCoverageRelationStatistics Valid=428, Invalid=1734, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:10:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46558 states. [2021-07-13 20:10:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46558 to 18168. [2021-07-13 20:10:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18168 states, 18167 states have (on average 3.048329388451588) internal successors, (55379), 18167 states have internal predecessors, (55379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18168 states to 18168 states and 55379 transitions. [2021-07-13 20:10:14,175 INFO L78 Accepts]: Start accepts. Automaton has 18168 states and 55379 transitions. Word has length 50 [2021-07-13 20:10:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:14,175 INFO L482 AbstractCegarLoop]: Abstraction has 18168 states and 55379 transitions. [2021-07-13 20:10:14,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 18168 states and 55379 transitions. [2021-07-13 20:10:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:10:14,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:14,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:10:14,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 20:10:14,425 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash -522681188, now seen corresponding path program 112 times [2021-07-13 20:10:14,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:14,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393329069] [2021-07-13 20:10:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:10:14,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:14,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393329069] [2021-07-13 20:10:14,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393329069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:14,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073315059] [2021-07-13 20:10:14,491 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:14,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:14,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:10:14,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:14,736 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 7 [2021-07-13 20:10:14,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:14,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:14,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:14,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2021-07-13 20:10:14,765 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 11 treesize of output 7 [2021-07-13 20:10:14,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:14,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:14,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:14,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073315059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:14,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:14,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 20:10:14,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180900600] [2021-07-13 20:10:14,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:10:14,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:10:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:10:14,853 INFO L87 Difference]: Start difference. First operand 18168 states and 55379 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:16,277 INFO L93 Difference]: Finished difference Result 42820 states and 128095 transitions. [2021-07-13 20:10:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:10:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:10:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:16,380 INFO L225 Difference]: With dead ends: 42820 [2021-07-13 20:10:16,380 INFO L226 Difference]: Without dead ends: 42820 [2021-07-13 20:10:16,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 741.7ms TimeCoverageRelationStatistics Valid=680, Invalid=4012, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:10:16,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42820 states. [2021-07-13 20:10:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42820 to 18704. [2021-07-13 20:10:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18703 states have (on average 3.0469978078383146) internal successors, (56988), 18703 states have internal predecessors, (56988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 56988 transitions. [2021-07-13 20:10:16,940 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 56988 transitions. Word has length 50 [2021-07-13 20:10:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:16,941 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 56988 transitions. [2021-07-13 20:10:16,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 56988 transitions. [2021-07-13 20:10:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:10:16,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:16,969 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:10:17,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 20:10:17,170 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash -782352394, now seen corresponding path program 113 times [2021-07-13 20:10:17,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:17,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836495542] [2021-07-13 20:10:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:17,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836495542] [2021-07-13 20:10:17,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836495542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070785505] [2021-07-13 20:10:17,228 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:17,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:10:17,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:10:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:17,296 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 5 treesize of output 3 [2021-07-13 20:10:17,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:17,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:17,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:17,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:11 [2021-07-13 20:10:17,327 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 11 treesize of output 7 [2021-07-13 20:10:17,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:17,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:17,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:17,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:17,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070785505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:17,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:17,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 20:10:17,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442294530] [2021-07-13 20:10:17,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:10:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:10:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:10:17,375 INFO L87 Difference]: Start difference. First operand 18704 states and 56988 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:18,318 INFO L93 Difference]: Finished difference Result 36696 states and 110045 transitions. [2021-07-13 20:10:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:10:18,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:10:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:18,436 INFO L225 Difference]: With dead ends: 36696 [2021-07-13 20:10:18,436 INFO L226 Difference]: Without dead ends: 36480 [2021-07-13 20:10:18,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36480 states. [2021-07-13 20:10:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36480 to 20510. [2021-07-13 20:10:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20510 states, 20509 states have (on average 3.056024184504364) internal successors, (62676), 20509 states have internal predecessors, (62676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20510 states to 20510 states and 62676 transitions. [2021-07-13 20:10:19,065 INFO L78 Accepts]: Start accepts. Automaton has 20510 states and 62676 transitions. Word has length 50 [2021-07-13 20:10:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:19,065 INFO L482 AbstractCegarLoop]: Abstraction has 20510 states and 62676 transitions. [2021-07-13 20:10:19,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 20510 states and 62676 transitions. [2021-07-13 20:10:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:10:19,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:19,096 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:10:19,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:10:19,298 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1684311114, now seen corresponding path program 114 times [2021-07-13 20:10:19,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:19,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542270769] [2021-07-13 20:10:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:19,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:19,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542270769] [2021-07-13 20:10:19,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542270769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:19,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148745718] [2021-07-13 20:10:19,358 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:19,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:10:19,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:19,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:10:19,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:19,455 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 11 treesize of output 7 [2021-07-13 20:10:19,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:19,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:19,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:19,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:19,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148745718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:19,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:19,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:10:19,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981629893] [2021-07-13 20:10:19,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:10:19,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:10:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:10:19,505 INFO L87 Difference]: Start difference. First operand 20510 states and 62676 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-07-13 20:10:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:21,159 INFO L93 Difference]: Finished difference Result 56439 states and 168853 transitions. [2021-07-13 20:10:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:10:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 50 [2021-07-13 20:10:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:21,320 INFO L225 Difference]: With dead ends: 56439 [2021-07-13 20:10:21,320 INFO L226 Difference]: Without dead ends: 56367 [2021-07-13 20:10:21,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 847.5ms TimeCoverageRelationStatistics Valid=603, Invalid=3819, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:10:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56367 states. [2021-07-13 20:10:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56367 to 20553. [2021-07-13 20:10:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20553 states, 20552 states have (on average 3.0566854807318022) internal successors, (62821), 20552 states have internal predecessors, (62821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20553 states to 20553 states and 62821 transitions. [2021-07-13 20:10:22,152 INFO L78 Accepts]: Start accepts. Automaton has 20553 states and 62821 transitions. Word has length 50 [2021-07-13 20:10:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:22,152 INFO L482 AbstractCegarLoop]: Abstraction has 20553 states and 62821 transitions. [2021-07-13 20:10:22,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-07-13 20:10:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 20553 states and 62821 transitions. [2021-07-13 20:10:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:10:22,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:22,184 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:10:22,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 20:10:22,385 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash 902973690, now seen corresponding path program 115 times [2021-07-13 20:10:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:22,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929993875] [2021-07-13 20:10:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:22,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929993875] [2021-07-13 20:10:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929993875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:22,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931298603] [2021-07-13 20:10:22,549 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:10:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:22,683 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 7 [2021-07-13 20:10:22,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:22,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:22,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:22,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:9 [2021-07-13 20:10:22,726 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 11 treesize of output 7 [2021-07-13 20:10:22,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:22,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:22,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:22,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:10:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:22,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931298603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:22,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:22,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-13 20:10:22,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546938415] [2021-07-13 20:10:22,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:10:22,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:22,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:10:22,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:10:22,752 INFO L87 Difference]: Start difference. First operand 20553 states and 62821 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:24,092 INFO L93 Difference]: Finished difference Result 37544 states and 112111 transitions. [2021-07-13 20:10:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:10:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:10:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:24,175 INFO L225 Difference]: With dead ends: 37544 [2021-07-13 20:10:24,175 INFO L226 Difference]: Without dead ends: 37544 [2021-07-13 20:10:24,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:10:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37544 states. [2021-07-13 20:10:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37544 to 19929. [2021-07-13 20:10:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19929 states, 19928 states have (on average 3.0583099156965075) internal successors, (60946), 19928 states have internal predecessors, (60946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19929 states to 19929 states and 60946 transitions. [2021-07-13 20:10:24,689 INFO L78 Accepts]: Start accepts. Automaton has 19929 states and 60946 transitions. Word has length 50 [2021-07-13 20:10:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:24,690 INFO L482 AbstractCegarLoop]: Abstraction has 19929 states and 60946 transitions. [2021-07-13 20:10:24,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 19929 states and 60946 transitions. [2021-07-13 20:10:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:10:24,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:24,725 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:24,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:24,941 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash -279799860, now seen corresponding path program 116 times [2021-07-13 20:10:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:24,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264742721] [2021-07-13 20:10:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:24,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:24,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264742721] [2021-07-13 20:10:24,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264742721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:24,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241632224] [2021-07-13 20:10:24,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:25,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:25,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:10:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:25,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241632224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:25,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:25,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:10:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699843735] [2021-07-13 20:10:25,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:10:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:10:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:10:25,075 INFO L87 Difference]: Start difference. First operand 19929 states and 60946 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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) [2021-07-13 20:10:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:25,186 INFO L93 Difference]: Finished difference Result 24230 states and 72312 transitions. [2021-07-13 20:10:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:10:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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 51 [2021-07-13 20:10:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:25,374 INFO L225 Difference]: With dead ends: 24230 [2021-07-13 20:10:25,375 INFO L226 Difference]: Without dead ends: 23607 [2021-07-13 20:10:25,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:10:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23607 states. [2021-07-13 20:10:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23607 to 21236. [2021-07-13 20:10:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21236 states, 21235 states have (on average 3.0346597598304688) internal successors, (64441), 21235 states have internal predecessors, (64441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21236 states to 21236 states and 64441 transitions. [2021-07-13 20:10:25,905 INFO L78 Accepts]: Start accepts. Automaton has 21236 states and 64441 transitions. Word has length 51 [2021-07-13 20:10:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:25,905 INFO L482 AbstractCegarLoop]: Abstraction has 21236 states and 64441 transitions. [2021-07-13 20:10:25,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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) [2021-07-13 20:10:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21236 states and 64441 transitions. [2021-07-13 20:10:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:25,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:25,936 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:26,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:26,155 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1503952681, now seen corresponding path program 117 times [2021-07-13 20:10:26,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:26,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571030844] [2021-07-13 20:10:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:26,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:26,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571030844] [2021-07-13 20:10:26,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571030844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:26,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475477465] [2021-07-13 20:10:26,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:26,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:10:26,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-13 20:10:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:27,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:27,111 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 17 [2021-07-13 20:10:27,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:27,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:27,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:27,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:10:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,210 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-07-13 20:10:27,211 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 27 treesize of output 23 [2021-07-13 20:10:27,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:27,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:27,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:27,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-07-13 20:10:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:27,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475477465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:27,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:27,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-07-13 20:10:27,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042981343] [2021-07-13 20:10:27,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:10:27,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:10:27,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:10:27,460 INFO L87 Difference]: Start difference. First operand 21236 states and 64441 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:30,076 INFO L93 Difference]: Finished difference Result 24085 states and 72142 transitions. [2021-07-13 20:10:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:10:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:30,126 INFO L225 Difference]: With dead ends: 24085 [2021-07-13 20:10:30,127 INFO L226 Difference]: Without dead ends: 23779 [2021-07-13 20:10:30,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2294.9ms TimeCoverageRelationStatistics Valid=434, Invalid=5266, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:10:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23779 states. [2021-07-13 20:10:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23779 to 21734. [2021-07-13 20:10:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21734 states, 21733 states have (on average 3.0231445267565453) internal successors, (65702), 21733 states have internal predecessors, (65702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21734 states to 21734 states and 65702 transitions. [2021-07-13 20:10:30,570 INFO L78 Accepts]: Start accepts. Automaton has 21734 states and 65702 transitions. Word has length 54 [2021-07-13 20:10:30,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:30,570 INFO L482 AbstractCegarLoop]: Abstraction has 21734 states and 65702 transitions. [2021-07-13 20:10:30,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 21734 states and 65702 transitions. [2021-07-13 20:10:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:30,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:30,600 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:30,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:30,800 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:30,801 INFO L82 PathProgramCache]: Analyzing trace with hash -293306583, now seen corresponding path program 118 times [2021-07-13 20:10:30,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:30,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243488750] [2021-07-13 20:10:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:31,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243488750] [2021-07-13 20:10:31,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243488750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199936962] [2021-07-13 20:10:31,235 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:31,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:31,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:31,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:10:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:31,517 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:31,517 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 37 treesize of output 17 [2021-07-13 20:10:31,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:31,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:31,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:31,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-07-13 20:10:31,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:31,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:10:31,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:31,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:31,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:31,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:10:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:31,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199936962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:31,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:31,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-13 20:10:31,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397969627] [2021-07-13 20:10:31,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:10:31,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:10:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:10:31,850 INFO L87 Difference]: Start difference. First operand 21734 states and 65702 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:33,707 INFO L93 Difference]: Finished difference Result 24415 states and 73086 transitions. [2021-07-13 20:10:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:10:33,707 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:33,764 INFO L225 Difference]: With dead ends: 24415 [2021-07-13 20:10:33,765 INFO L226 Difference]: Without dead ends: 24056 [2021-07-13 20:10:33,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1600.7ms TimeCoverageRelationStatistics Valid=263, Invalid=3159, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:10:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24056 states. [2021-07-13 20:10:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24056 to 21496. [2021-07-13 20:10:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21496 states, 21495 states have (on average 3.0284252151663176) internal successors, (65096), 21495 states have internal predecessors, (65096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21496 states to 21496 states and 65096 transitions. [2021-07-13 20:10:34,245 INFO L78 Accepts]: Start accepts. Automaton has 21496 states and 65096 transitions. Word has length 54 [2021-07-13 20:10:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:34,246 INFO L482 AbstractCegarLoop]: Abstraction has 21496 states and 65096 transitions. [2021-07-13 20:10:34,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 21496 states and 65096 transitions. [2021-07-13 20:10:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:34,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:34,280 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:34,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:34,481 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1977113673, now seen corresponding path program 119 times [2021-07-13 20:10:34,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:34,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797571683] [2021-07-13 20:10:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:34,718 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-13 20:10:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:35,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:35,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797571683] [2021-07-13 20:10:35,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797571683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:35,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065393111] [2021-07-13 20:10:35,042 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:35,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:10:35,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:10:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:35,356 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:35,357 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 17 [2021-07-13 20:10:35,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:35,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:35,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:35,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:10:35,461 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:35,461 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 25 treesize of output 13 [2021-07-13 20:10:35,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:35,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:35,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:35,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:35,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065393111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:35,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:35,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 38 [2021-07-13 20:10:35,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025440262] [2021-07-13 20:10:35,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:10:35,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:35,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:10:35,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:10:35,671 INFO L87 Difference]: Start difference. First operand 21496 states and 65096 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:37,621 INFO L93 Difference]: Finished difference Result 24172 states and 72428 transitions. [2021-07-13 20:10:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:10:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:37,672 INFO L225 Difference]: With dead ends: 24172 [2021-07-13 20:10:37,672 INFO L226 Difference]: Without dead ends: 23804 [2021-07-13 20:10:37,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1668.2ms TimeCoverageRelationStatistics Valid=309, Invalid=3851, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:10:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23804 states. [2021-07-13 20:10:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23804 to 21503. [2021-07-13 20:10:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21503 states, 21502 states have (on average 3.028136917496047) internal successors, (65111), 21502 states have internal predecessors, (65111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21503 states to 21503 states and 65111 transitions. [2021-07-13 20:10:38,074 INFO L78 Accepts]: Start accepts. Automaton has 21503 states and 65111 transitions. Word has length 54 [2021-07-13 20:10:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:38,075 INFO L482 AbstractCegarLoop]: Abstraction has 21503 states and 65111 transitions. [2021-07-13 20:10:38,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 21503 states and 65111 transitions. [2021-07-13 20:10:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:38,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:38,104 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:38,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 20:10:38,314 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:38,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1414738751, now seen corresponding path program 120 times [2021-07-13 20:10:38,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:38,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808558587] [2021-07-13 20:10:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:38,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:38,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808558587] [2021-07-13 20:10:38,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808558587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:38,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412863271] [2021-07-13 20:10:38,742 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:38,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:10:38,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:38,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:10:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:39,029 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:39,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17 [2021-07-13 20:10:39,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:39,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:39,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:39,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:10:39,136 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:39,136 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 25 treesize of output 13 [2021-07-13 20:10:39,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:39,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:39,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:39,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:39,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412863271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:39,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:39,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-07-13 20:10:39,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852461433] [2021-07-13 20:10:39,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:10:39,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:10:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:10:39,286 INFO L87 Difference]: Start difference. First operand 21503 states and 65111 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:41,397 INFO L93 Difference]: Finished difference Result 24269 states and 72692 transitions. [2021-07-13 20:10:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:10:41,397 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:41,447 INFO L225 Difference]: With dead ends: 24269 [2021-07-13 20:10:41,448 INFO L226 Difference]: Without dead ends: 23858 [2021-07-13 20:10:41,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1468.3ms TimeCoverageRelationStatistics Valid=254, Invalid=3286, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:10:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23858 states. [2021-07-13 20:10:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23858 to 21513. [2021-07-13 20:10:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21513 states, 21512 states have (on average 3.0280773521755298) internal successors, (65140), 21512 states have internal predecessors, (65140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21513 states to 21513 states and 65140 transitions. [2021-07-13 20:10:41,827 INFO L78 Accepts]: Start accepts. Automaton has 21513 states and 65140 transitions. Word has length 54 [2021-07-13 20:10:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:41,827 INFO L482 AbstractCegarLoop]: Abstraction has 21513 states and 65140 transitions. [2021-07-13 20:10:41,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21513 states and 65140 transitions. [2021-07-13 20:10:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:41,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:41,857 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:42,061 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2076611709, now seen corresponding path program 121 times [2021-07-13 20:10:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:42,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862394739] [2021-07-13 20:10:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:42,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:42,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862394739] [2021-07-13 20:10:42,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862394739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:42,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786957664] [2021-07-13 20:10:42,487 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:10:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:42,820 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:42,820 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 15 [2021-07-13 20:10:42,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:42,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:42,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:42,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-07-13 20:10:42,948 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:42,948 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 25 treesize of output 13 [2021-07-13 20:10:42,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:42,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:42,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:42,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:43,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786957664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:43,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:43,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-07-13 20:10:43,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040850829] [2021-07-13 20:10:43,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:10:43,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:43,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:10:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:10:43,084 INFO L87 Difference]: Start difference. First operand 21513 states and 65140 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:45,086 INFO L93 Difference]: Finished difference Result 25230 states and 75230 transitions. [2021-07-13 20:10:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:10:45,087 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:45,137 INFO L225 Difference]: With dead ends: 25230 [2021-07-13 20:10:45,137 INFO L226 Difference]: Without dead ends: 24862 [2021-07-13 20:10:45,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1399.6ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:10:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24862 states. [2021-07-13 20:10:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24862 to 21541. [2021-07-13 20:10:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21541 states, 21540 states have (on average 3.027483751160631) internal successors, (65212), 21540 states have internal predecessors, (65212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21541 states to 21541 states and 65212 transitions. [2021-07-13 20:10:45,490 INFO L78 Accepts]: Start accepts. Automaton has 21541 states and 65212 transitions. Word has length 54 [2021-07-13 20:10:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:45,490 INFO L482 AbstractCegarLoop]: Abstraction has 21541 states and 65212 transitions. [2021-07-13 20:10:45,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 21541 states and 65212 transitions. [2021-07-13 20:10:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:45,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:45,518 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:45,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 20:10:45,719 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1173496837, now seen corresponding path program 122 times [2021-07-13 20:10:45,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:45,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119690505] [2021-07-13 20:10:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:46,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:46,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119690505] [2021-07-13 20:10:46,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119690505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:46,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012137303] [2021-07-13 20:10:46,187 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:46,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:46,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:10:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:46,424 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:46,424 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 15 [2021-07-13 20:10:46,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:46,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:46,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:46,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-07-13 20:10:46,557 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:46,557 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 29 treesize of output 13 [2021-07-13 20:10:46,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:46,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:46,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:46,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:10:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:46,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012137303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:46,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:46,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-07-13 20:10:46,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049954001] [2021-07-13 20:10:46,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:10:46,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:10:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:10:46,695 INFO L87 Difference]: Start difference. First operand 21541 states and 65212 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:48,668 INFO L93 Difference]: Finished difference Result 25117 states and 74931 transitions. [2021-07-13 20:10:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:10:48,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:48,725 INFO L225 Difference]: With dead ends: 25117 [2021-07-13 20:10:48,725 INFO L226 Difference]: Without dead ends: 24722 [2021-07-13 20:10:48,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1502.0ms TimeCoverageRelationStatistics Valid=268, Invalid=3392, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:10:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24722 states. [2021-07-13 20:10:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24722 to 21534. [2021-07-13 20:10:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21534 states, 21533 states have (on average 3.0275855663400364) internal successors, (65193), 21533 states have internal predecessors, (65193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21534 states to 21534 states and 65193 transitions. [2021-07-13 20:10:49,201 INFO L78 Accepts]: Start accepts. Automaton has 21534 states and 65193 transitions. Word has length 54 [2021-07-13 20:10:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:49,201 INFO L482 AbstractCegarLoop]: Abstraction has 21534 states and 65193 transitions. [2021-07-13 20:10:49,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 21534 states and 65193 transitions. [2021-07-13 20:10:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:49,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:49,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:49,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,430 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1045695337, now seen corresponding path program 123 times [2021-07-13 20:10:49,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:49,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250502615] [2021-07-13 20:10:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:49,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:49,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250502615] [2021-07-13 20:10:49,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250502615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:49,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240366156] [2021-07-13 20:10:49,837 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:10:49,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:49,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-13 20:10:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:50,164 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:50,164 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 31 treesize of output 15 [2021-07-13 20:10:50,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:50,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:10:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:50,360 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-07-13 20:10:50,360 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 31 treesize of output 23 [2021-07-13 20:10:50,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:50,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:10:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:50,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240366156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:50,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:50,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 38 [2021-07-13 20:10:50,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944149245] [2021-07-13 20:10:50,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:10:50,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:50,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:10:50,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:10:50,622 INFO L87 Difference]: Start difference. First operand 21534 states and 65193 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:53,600 INFO L93 Difference]: Finished difference Result 24107 states and 72144 transitions. [2021-07-13 20:10:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:10:53,601 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:53,647 INFO L225 Difference]: With dead ends: 24107 [2021-07-13 20:10:53,648 INFO L226 Difference]: Without dead ends: 23789 [2021-07-13 20:10:53,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 2482.0ms TimeCoverageRelationStatistics Valid=474, Invalid=6332, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:10:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23789 states. [2021-07-13 20:10:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23789 to 21905. [2021-07-13 20:10:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21905 states, 21904 states have (on average 3.0199050401753103) internal successors, (66148), 21904 states have internal predecessors, (66148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21905 states to 21905 states and 66148 transitions. [2021-07-13 20:10:54,055 INFO L78 Accepts]: Start accepts. Automaton has 21905 states and 66148 transitions. Word has length 54 [2021-07-13 20:10:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:54,055 INFO L482 AbstractCegarLoop]: Abstraction has 21905 states and 66148 transitions. [2021-07-13 20:10:54,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 21905 states and 66148 transitions. [2021-07-13 20:10:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:54,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:54,084 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:54,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:54,285 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:54,285 INFO L82 PathProgramCache]: Analyzing trace with hash 164950761, now seen corresponding path program 124 times [2021-07-13 20:10:54,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:54,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204803295] [2021-07-13 20:10:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:54,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:54,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204803295] [2021-07-13 20:10:54,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204803295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:54,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214669450] [2021-07-13 20:10:54,717 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:54,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:10:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:54,947 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:54,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15 [2021-07-13 20:10:54,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:54,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:54,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:54,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-07-13 20:10:55,079 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:55,080 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 25 treesize of output 13 [2021-07-13 20:10:55,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:55,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:55,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:55,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:55,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214669450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:55,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:55,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-07-13 20:10:55,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141063776] [2021-07-13 20:10:55,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:10:55,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:55,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:10:55,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:10:55,237 INFO L87 Difference]: Start difference. First operand 21905 states and 66148 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:55,620 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-13 20:10:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:57,392 INFO L93 Difference]: Finished difference Result 24271 states and 72625 transitions. [2021-07-13 20:10:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:10:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:57,453 INFO L225 Difference]: With dead ends: 24271 [2021-07-13 20:10:57,454 INFO L226 Difference]: Without dead ends: 23937 [2021-07-13 20:10:57,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1688.5ms TimeCoverageRelationStatistics Valid=262, Invalid=3398, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:10:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23937 states. [2021-07-13 20:10:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23937 to 21849. [2021-07-13 20:10:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21849 states, 21848 states have (on average 3.020779934090077) internal successors, (65998), 21848 states have internal predecessors, (65998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 65998 transitions. [2021-07-13 20:10:57,847 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 65998 transitions. Word has length 54 [2021-07-13 20:10:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:57,847 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 65998 transitions. [2021-07-13 20:10:57,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 65998 transitions. [2021-07-13 20:10:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:57,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:57,876 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:58,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 20:10:58,076 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2125451877, now seen corresponding path program 125 times [2021-07-13 20:10:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:58,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248382851] [2021-07-13 20:10:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:58,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:58,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248382851] [2021-07-13 20:10:58,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248382851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:58,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774268180] [2021-07-13 20:10:58,534 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:58,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:10:58,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:10:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:59,149 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:59,149 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 29 treesize of output 17 [2021-07-13 20:10:59,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:59,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:59,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:59,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:10:59,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:59,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:59,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:59,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:59,270 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 25 treesize of output 13 [2021-07-13 20:10:59,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:59,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:59,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:59,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-07-13 20:10:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:10:59,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774268180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:59,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:59,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 42 [2021-07-13 20:10:59,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216112742] [2021-07-13 20:10:59,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:10:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:10:59,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:10:59,436 INFO L87 Difference]: Start difference. First operand 21849 states and 65998 transitions. Second operand has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:01,914 INFO L93 Difference]: Finished difference Result 24637 states and 73616 transitions. [2021-07-13 20:11:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:11:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:01,959 INFO L225 Difference]: With dead ends: 24637 [2021-07-13 20:11:01,959 INFO L226 Difference]: Without dead ends: 24221 [2021-07-13 20:11:01,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 2067.5ms TimeCoverageRelationStatistics Valid=327, Invalid=4503, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:11:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24221 states. [2021-07-13 20:11:02,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24221 to 21994. [2021-07-13 20:11:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21994 states, 21993 states have (on average 3.017687446005547) internal successors, (66368), 21993 states have internal predecessors, (66368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21994 states to 21994 states and 66368 transitions. [2021-07-13 20:11:02,329 INFO L78 Accepts]: Start accepts. Automaton has 21994 states and 66368 transitions. Word has length 54 [2021-07-13 20:11:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:02,329 INFO L482 AbstractCegarLoop]: Abstraction has 21994 states and 66368 transitions. [2021-07-13 20:11:02,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 21994 states and 66368 transitions. [2021-07-13 20:11:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:02,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:02,358 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:02,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:11:02,558 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:02,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1696354427, now seen corresponding path program 126 times [2021-07-13 20:11:02,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:02,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279014975] [2021-07-13 20:11:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:03,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:03,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279014975] [2021-07-13 20:11:03,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279014975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:03,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042492807] [2021-07-13 20:11:03,043 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:03,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:11:03,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:11:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:03,325 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:03,325 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 17 [2021-07-13 20:11:03,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:03,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:03,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:03,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:11:03,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:03,471 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 25 treesize of output 13 [2021-07-13 20:11:03,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:03,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:03,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:03,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:03,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042492807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:03,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:03,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:03,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308911922] [2021-07-13 20:11:03,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:03,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:03,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:03,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:03,613 INFO L87 Difference]: Start difference. First operand 21994 states and 66368 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:05,700 INFO L93 Difference]: Finished difference Result 25411 states and 75653 transitions. [2021-07-13 20:11:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:11:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:05,752 INFO L225 Difference]: With dead ends: 25411 [2021-07-13 20:11:05,753 INFO L226 Difference]: Without dead ends: 25043 [2021-07-13 20:11:05,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1602.4ms TimeCoverageRelationStatistics Valid=267, Invalid=3273, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:11:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25043 states. [2021-07-13 20:11:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25043 to 22001. [2021-07-13 20:11:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22001 states, 22000 states have (on average 3.0174090909090907) internal successors, (66383), 22000 states have internal predecessors, (66383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22001 states to 22001 states and 66383 transitions. [2021-07-13 20:11:06,185 INFO L78 Accepts]: Start accepts. Automaton has 22001 states and 66383 transitions. Word has length 54 [2021-07-13 20:11:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:06,185 INFO L482 AbstractCegarLoop]: Abstraction has 22001 states and 66383 transitions. [2021-07-13 20:11:06,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22001 states and 66383 transitions. [2021-07-13 20:11:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:06,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:06,212 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:06,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:06,412 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash 793239555, now seen corresponding path program 127 times [2021-07-13 20:11:06,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:06,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276289037] [2021-07-13 20:11:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:06,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:06,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276289037] [2021-07-13 20:11:06,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276289037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:06,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496484782] [2021-07-13 20:11:06,869 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:11:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:07,159 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:07,160 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 37 treesize of output 17 [2021-07-13 20:11:07,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:07,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-07-13 20:11:07,293 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:07,294 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 27 treesize of output 13 [2021-07-13 20:11:07,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:07,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:11:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:07,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496484782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:07,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:07,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:07,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837722136] [2021-07-13 20:11:07,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:07,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:07,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:07,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:07,443 INFO L87 Difference]: Start difference. First operand 22001 states and 66383 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:09,508 INFO L93 Difference]: Finished difference Result 24839 states and 74147 transitions. [2021-07-13 20:11:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:11:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:09,557 INFO L225 Difference]: With dead ends: 24839 [2021-07-13 20:11:09,557 INFO L226 Difference]: Without dead ends: 24428 [2021-07-13 20:11:09,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1616.2ms TimeCoverageRelationStatistics Valid=265, Invalid=3395, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:11:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24428 states. [2021-07-13 20:11:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24428 to 21966. [2021-07-13 20:11:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21966 states, 21965 states have (on average 3.018074208968814) internal successors, (66292), 21965 states have internal predecessors, (66292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21966 states to 21966 states and 66292 transitions. [2021-07-13 20:11:10,006 INFO L78 Accepts]: Start accepts. Automaton has 21966 states and 66292 transitions. Word has length 54 [2021-07-13 20:11:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:10,006 INFO L482 AbstractCegarLoop]: Abstraction has 21966 states and 66292 transitions. [2021-07-13 20:11:10,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,006 INFO L276 IsEmpty]: Start isEmpty. Operand 21966 states and 66292 transitions. [2021-07-13 20:11:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:10,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:10,035 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:10,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:11:10,236 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:10,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1455112513, now seen corresponding path program 128 times [2021-07-13 20:11:10,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:10,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479140702] [2021-07-13 20:11:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:10,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479140702] [2021-07-13 20:11:10,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479140702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:10,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192044489] [2021-07-13 20:11:10,627 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:10,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:10,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:11:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:10,874 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:10,874 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 37 treesize of output 17 [2021-07-13 20:11:10,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:10,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:10,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:10,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:29 [2021-07-13 20:11:11,015 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:11,015 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 29 treesize of output 13 [2021-07-13 20:11:11,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:11,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:11,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:11,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:11,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192044489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:11,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:11,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:11,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490369070] [2021-07-13 20:11:11,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:11,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:11,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:11,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:11,172 INFO L87 Difference]: Start difference. First operand 21966 states and 66292 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:13,271 INFO L93 Difference]: Finished difference Result 25605 states and 76167 transitions. [2021-07-13 20:11:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:11:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:13,325 INFO L225 Difference]: With dead ends: 25605 [2021-07-13 20:11:13,325 INFO L226 Difference]: Without dead ends: 25237 [2021-07-13 20:11:13,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1450.2ms TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:11:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-07-13 20:11:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 21994. [2021-07-13 20:11:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21994 states, 21993 states have (on average 3.0175055699540763) internal successors, (66364), 21993 states have internal predecessors, (66364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21994 states to 21994 states and 66364 transitions. [2021-07-13 20:11:13,823 INFO L78 Accepts]: Start accepts. Automaton has 21994 states and 66364 transitions. Word has length 54 [2021-07-13 20:11:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:13,823 INFO L482 AbstractCegarLoop]: Abstraction has 21994 states and 66364 transitions. [2021-07-13 20:11:13,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 21994 states and 66364 transitions. [2021-07-13 20:11:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:13,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:13,854 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:14,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 20:11:14,055 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash 551997641, now seen corresponding path program 129 times [2021-07-13 20:11:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:14,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244033292] [2021-07-13 20:11:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:14,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:14,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244033292] [2021-07-13 20:11:14,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244033292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:14,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120139933] [2021-07-13 20:11:14,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:11:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-13 20:11:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:14,865 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:14,865 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 17 [2021-07-13 20:11:14,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:14,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:14,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:14,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:11:15,087 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:15,087 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 29 treesize of output 13 [2021-07-13 20:11:15,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:15,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:15,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:15,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:15,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120139933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:15,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:15,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 41 [2021-07-13 20:11:15,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489782892] [2021-07-13 20:11:15,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:11:15,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:15,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:11:15,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1599, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:11:15,236 INFO L87 Difference]: Start difference. First operand 21994 states and 66364 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:17,738 INFO L93 Difference]: Finished difference Result 25692 states and 76400 transitions. [2021-07-13 20:11:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:11:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:17,799 INFO L225 Difference]: With dead ends: 25692 [2021-07-13 20:11:17,799 INFO L226 Difference]: Without dead ends: 25297 [2021-07-13 20:11:17,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1892.3ms TimeCoverageRelationStatistics Valid=352, Invalid=4760, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:11:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25297 states. [2021-07-13 20:11:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25297 to 21987. [2021-07-13 20:11:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21987 states, 21986 states have (on average 3.0176021104339124) internal successors, (66345), 21986 states have internal predecessors, (66345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21987 states to 21987 states and 66345 transitions. [2021-07-13 20:11:18,228 INFO L78 Accepts]: Start accepts. Automaton has 21987 states and 66345 transitions. Word has length 54 [2021-07-13 20:11:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:18,228 INFO L482 AbstractCegarLoop]: Abstraction has 21987 states and 66345 transitions. [2021-07-13 20:11:18,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:18,228 INFO L276 IsEmpty]: Start isEmpty. Operand 21987 states and 66345 transitions. [2021-07-13 20:11:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:18,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:18,258 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:18,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-13 20:11:18,459 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:18,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1667194533, now seen corresponding path program 130 times [2021-07-13 20:11:18,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:18,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339296833] [2021-07-13 20:11:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:18,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:18,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339296833] [2021-07-13 20:11:18,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339296833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:18,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454582738] [2021-07-13 20:11:18,857 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:18,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:18,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:18,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:11:18,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:19,096 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:19,097 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 15 [2021-07-13 20:11:19,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:19,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:19,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:19,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-07-13 20:11:19,229 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:19,229 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 25 treesize of output 13 [2021-07-13 20:11:19,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:19,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:19,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:19,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:19,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454582738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:19,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:19,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:19,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91178728] [2021-07-13 20:11:19,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:19,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:19,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:19,371 INFO L87 Difference]: Start difference. First operand 21987 states and 66345 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:19,558 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:11:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:21,631 INFO L93 Difference]: Finished difference Result 24409 states and 72933 transitions. [2021-07-13 20:11:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:11:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:21,801 INFO L225 Difference]: With dead ends: 24409 [2021-07-13 20:11:21,802 INFO L226 Difference]: Without dead ends: 24018 [2021-07-13 20:11:21,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1565.4ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:11:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24018 states. [2021-07-13 20:11:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24018 to 21861. [2021-07-13 20:11:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21861 states, 21860 states have (on average 3.0205855443732847) internal successors, (66030), 21860 states have internal predecessors, (66030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21861 states to 21861 states and 66030 transitions. [2021-07-13 20:11:22,148 INFO L78 Accepts]: Start accepts. Automaton has 21861 states and 66030 transitions. Word has length 54 [2021-07-13 20:11:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:22,148 INFO L482 AbstractCegarLoop]: Abstraction has 21861 states and 66030 transitions. [2021-07-13 20:11:22,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:22,149 INFO L276 IsEmpty]: Start isEmpty. Operand 21861 states and 66030 transitions. [2021-07-13 20:11:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:22,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:22,178 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:22,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:22,379 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash -170873693, now seen corresponding path program 131 times [2021-07-13 20:11:22,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:22,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363462221] [2021-07-13 20:11:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:22,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:22,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363462221] [2021-07-13 20:11:22,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363462221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:22,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29422261] [2021-07-13 20:11:22,823 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:22,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:11:22,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:11:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:23,129 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:23,129 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 17 [2021-07-13 20:11:23,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:23,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:23,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:23,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:11:23,216 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:23,217 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 25 treesize of output 13 [2021-07-13 20:11:23,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:23,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:23,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:23,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:23,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29422261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:23,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:23,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:11:23,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384637827] [2021-07-13 20:11:23,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:11:23,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:23,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:11:23,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:11:23,360 INFO L87 Difference]: Start difference. First operand 21861 states and 66030 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:25,539 INFO L93 Difference]: Finished difference Result 24866 states and 74208 transitions. [2021-07-13 20:11:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:11:25,539 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:25,587 INFO L225 Difference]: With dead ends: 24866 [2021-07-13 20:11:25,587 INFO L226 Difference]: Without dead ends: 24450 [2021-07-13 20:11:25,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1509.4ms TimeCoverageRelationStatistics Valid=268, Invalid=3392, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:11:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24450 states. [2021-07-13 20:11:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24450 to 22021. [2021-07-13 20:11:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22021 states, 22020 states have (on average 3.017529518619437) internal successors, (66446), 22020 states have internal predecessors, (66446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22021 states to 22021 states and 66446 transitions. [2021-07-13 20:11:26,066 INFO L78 Accepts]: Start accepts. Automaton has 22021 states and 66446 transitions. Word has length 54 [2021-07-13 20:11:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:26,066 INFO L482 AbstractCegarLoop]: Abstraction has 22021 states and 66446 transitions. [2021-07-13 20:11:26,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22021 states and 66446 transitions. [2021-07-13 20:11:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:26,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:26,096 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:26,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:26,296 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -644034685, now seen corresponding path program 132 times [2021-07-13 20:11:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:26,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257276764] [2021-07-13 20:11:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:26,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:26,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257276764] [2021-07-13 20:11:26,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257276764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:26,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237843373] [2021-07-13 20:11:26,745 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:26,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:11:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:11:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:27,093 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:27,093 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 17 [2021-07-13 20:11:27,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:27,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:27,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:27,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:11:27,225 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:27,225 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 29 treesize of output 13 [2021-07-13 20:11:27,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:27,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:27,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:27,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:27,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237843373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:27,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:27,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:27,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211369930] [2021-07-13 20:11:27,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:27,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:27,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:27,395 INFO L87 Difference]: Start difference. First operand 22021 states and 66446 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:29,507 INFO L93 Difference]: Finished difference Result 25640 states and 76245 transitions. [2021-07-13 20:11:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:11:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:29,561 INFO L225 Difference]: With dead ends: 25640 [2021-07-13 20:11:29,561 INFO L226 Difference]: Without dead ends: 25272 [2021-07-13 20:11:29,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1692.8ms TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:11:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25272 states. [2021-07-13 20:11:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25272 to 22028. [2021-07-13 20:11:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22028 states, 22027 states have (on average 3.0172515549098833) internal successors, (66461), 22027 states have internal predecessors, (66461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22028 states to 22028 states and 66461 transitions. [2021-07-13 20:11:30,068 INFO L78 Accepts]: Start accepts. Automaton has 22028 states and 66461 transitions. Word has length 54 [2021-07-13 20:11:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:30,068 INFO L482 AbstractCegarLoop]: Abstraction has 22028 states and 66461 transitions. [2021-07-13 20:11:30,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 22028 states and 66461 transitions. [2021-07-13 20:11:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:30,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:30,099 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:30,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:30,299 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:30,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1547149557, now seen corresponding path program 133 times [2021-07-13 20:11:30,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:30,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779758189] [2021-07-13 20:11:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:30,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:30,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779758189] [2021-07-13 20:11:30,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779758189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:30,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949473310] [2021-07-13 20:11:30,723 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:11:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:30,989 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:30,990 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 37 treesize of output 17 [2021-07-13 20:11:30,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:30,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:30,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:30,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-07-13 20:11:31,109 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:31,110 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 29 treesize of output 13 [2021-07-13 20:11:31,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:31,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:31,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:31,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:31,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949473310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:31,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:31,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:31,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202641618] [2021-07-13 20:11:31,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:31,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:31,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:31,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:31,285 INFO L87 Difference]: Start difference. First operand 22028 states and 66461 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:33,573 INFO L93 Difference]: Finished difference Result 25068 states and 74739 transitions. [2021-07-13 20:11:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:11:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:33,627 INFO L225 Difference]: With dead ends: 25068 [2021-07-13 20:11:33,628 INFO L226 Difference]: Without dead ends: 24657 [2021-07-13 20:11:33,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1576.6ms TimeCoverageRelationStatistics Valid=267, Invalid=3515, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:11:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24657 states. [2021-07-13 20:11:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24657 to 21993. [2021-07-13 20:11:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21993 states, 21992 states have (on average 3.0179156056747907) internal successors, (66370), 21992 states have internal predecessors, (66370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21993 states to 21993 states and 66370 transitions. [2021-07-13 20:11:34,010 INFO L78 Accepts]: Start accepts. Automaton has 21993 states and 66370 transitions. Word has length 54 [2021-07-13 20:11:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:34,010 INFO L482 AbstractCegarLoop]: Abstraction has 21993 states and 66370 transitions. [2021-07-13 20:11:34,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 21993 states and 66370 transitions. [2021-07-13 20:11:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:34,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:34,217 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:34,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-13 20:11:34,440 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash -885276599, now seen corresponding path program 134 times [2021-07-13 20:11:34,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:34,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613253335] [2021-07-13 20:11:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:34,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:34,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613253335] [2021-07-13 20:11:34,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613253335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:34,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164605136] [2021-07-13 20:11:34,823 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:34,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:34,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:11:34,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:35,067 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:35,067 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 15 [2021-07-13 20:11:35,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:35,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:35,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:35,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:25 [2021-07-13 20:11:35,201 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:35,201 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 29 treesize of output 13 [2021-07-13 20:11:35,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:35,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:35,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:35,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:35,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164605136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:35,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:35,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:35,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871922333] [2021-07-13 20:11:35,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:35,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:35,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:35,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:35,341 INFO L87 Difference]: Start difference. First operand 21993 states and 66370 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:37,552 INFO L93 Difference]: Finished difference Result 25834 states and 76759 transitions. [2021-07-13 20:11:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:11:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:37,607 INFO L225 Difference]: With dead ends: 25834 [2021-07-13 20:11:37,607 INFO L226 Difference]: Without dead ends: 25466 [2021-07-13 20:11:37,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1558.8ms TimeCoverageRelationStatistics Valid=280, Invalid=3502, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:11:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25466 states. [2021-07-13 20:11:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25466 to 22021. [2021-07-13 20:11:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22021 states, 22020 states have (on average 3.0173478655767485) internal successors, (66442), 22020 states have internal predecessors, (66442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22021 states to 22021 states and 66442 transitions. [2021-07-13 20:11:37,978 INFO L78 Accepts]: Start accepts. Automaton has 22021 states and 66442 transitions. Word has length 54 [2021-07-13 20:11:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:37,978 INFO L482 AbstractCegarLoop]: Abstraction has 22021 states and 66442 transitions. [2021-07-13 20:11:37,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 22021 states and 66442 transitions. [2021-07-13 20:11:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:38,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:38,007 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:38,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:38,209 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1788391471, now seen corresponding path program 135 times [2021-07-13 20:11:38,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:38,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683448952] [2021-07-13 20:11:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:38,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683448952] [2021-07-13 20:11:38,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683448952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619514910] [2021-07-13 20:11:38,639 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:38,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:11:38,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:11:38,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:39,013 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:39,013 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 31 treesize of output 15 [2021-07-13 20:11:39,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:39,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:39,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:39,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:11:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,274 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-07-13 20:11:39,274 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 31 treesize of output 23 [2021-07-13 20:11:39,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:39,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:39,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:39,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:11:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:39,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619514910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:39,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:39,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 41 [2021-07-13 20:11:39,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859380945] [2021-07-13 20:11:39,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:11:39,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:39,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:11:39,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:11:39,536 INFO L87 Difference]: Start difference. First operand 22021 states and 66442 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:42,993 INFO L93 Difference]: Finished difference Result 25688 states and 76292 transitions. [2021-07-13 20:11:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:11:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:43,044 INFO L225 Difference]: With dead ends: 25688 [2021-07-13 20:11:43,044 INFO L226 Difference]: Without dead ends: 25382 [2021-07-13 20:11:43,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2499.0ms TimeCoverageRelationStatistics Valid=474, Invalid=6332, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:11:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25382 states. [2021-07-13 20:11:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25382 to 22245. [2021-07-13 20:11:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22245 states, 22244 states have (on average 3.0129023556914225) internal successors, (67019), 22244 states have internal predecessors, (67019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22245 states to 22245 states and 67019 transitions. [2021-07-13 20:11:43,403 INFO L78 Accepts]: Start accepts. Automaton has 22245 states and 67019 transitions. Word has length 54 [2021-07-13 20:11:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:43,403 INFO L482 AbstractCegarLoop]: Abstraction has 22245 states and 67019 transitions. [2021-07-13 20:11:43,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22245 states and 67019 transitions. [2021-07-13 20:11:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:43,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:43,431 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:43,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 20:11:43,631 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash -577745373, now seen corresponding path program 136 times [2021-07-13 20:11:43,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:43,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511932820] [2021-07-13 20:11:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:44,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:44,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511932820] [2021-07-13 20:11:44,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511932820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:44,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555192669] [2021-07-13 20:11:44,002 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:44,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:44,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:44,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:11:44,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:44,234 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:44,234 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 15 [2021-07-13 20:11:44,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:44,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:44,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:44,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-07-13 20:11:44,368 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:44,368 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 25 treesize of output 13 [2021-07-13 20:11:44,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:44,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:44,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:44,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:44,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555192669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:44,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:44,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:44,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910335666] [2021-07-13 20:11:44,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:44,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:44,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:44,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:44,509 INFO L87 Difference]: Start difference. First operand 22245 states and 67019 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:46,744 INFO L93 Difference]: Finished difference Result 25868 states and 76861 transitions. [2021-07-13 20:11:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:11:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:46,801 INFO L225 Difference]: With dead ends: 25868 [2021-07-13 20:11:46,801 INFO L226 Difference]: Without dead ends: 25530 [2021-07-13 20:11:46,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1483.0ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:11:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25530 states. [2021-07-13 20:11:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25530 to 22014. [2021-07-13 20:11:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22014 states, 22013 states have (on average 3.017444237496025) internal successors, (66423), 22013 states have internal predecessors, (66423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22014 states to 22014 states and 66423 transitions. [2021-07-13 20:11:47,191 INFO L78 Accepts]: Start accepts. Automaton has 22014 states and 66423 transitions. Word has length 54 [2021-07-13 20:11:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:47,192 INFO L482 AbstractCegarLoop]: Abstraction has 22014 states and 66423 transitions. [2021-07-13 20:11:47,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 22014 states and 66423 transitions. [2021-07-13 20:11:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:47,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:47,224 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:47,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:47,425 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash 287383651, now seen corresponding path program 137 times [2021-07-13 20:11:47,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:47,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35600164] [2021-07-13 20:11:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:47,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:47,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35600164] [2021-07-13 20:11:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35600164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:47,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453377167] [2021-07-13 20:11:47,846 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:47,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:11:47,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:11:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:48,127 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:48,127 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 17 [2021-07-13 20:11:48,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:48,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:48,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:48,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:11:48,261 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:48,261 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 25 treesize of output 13 [2021-07-13 20:11:48,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:48,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:48,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:48,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:48,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453377167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:48,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:48,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:48,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981725004] [2021-07-13 20:11:48,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:48,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:48,446 INFO L87 Difference]: Start difference. First operand 22014 states and 66423 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:50,894 INFO L93 Difference]: Finished difference Result 24547 states and 73295 transitions. [2021-07-13 20:11:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:11:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:50,950 INFO L225 Difference]: With dead ends: 24547 [2021-07-13 20:11:50,950 INFO L226 Difference]: Without dead ends: 24156 [2021-07-13 20:11:50,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1692.6ms TimeCoverageRelationStatistics Valid=274, Invalid=3758, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:11:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24156 states. [2021-07-13 20:11:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24156 to 21909. [2021-07-13 20:11:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21909 states, 21908 states have (on average 3.0198101150264742) internal successors, (66158), 21908 states have internal predecessors, (66158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21909 states to 21909 states and 66158 transitions. [2021-07-13 20:11:51,428 INFO L78 Accepts]: Start accepts. Automaton has 21909 states and 66158 transitions. Word has length 54 [2021-07-13 20:11:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:51,429 INFO L482 AbstractCegarLoop]: Abstraction has 21909 states and 66158 transitions. [2021-07-13 20:11:51,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21909 states and 66158 transitions. [2021-07-13 20:11:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:51,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:51,459 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:51,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 20:11:51,659 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1335678551, now seen corresponding path program 138 times [2021-07-13 20:11:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:51,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056216101] [2021-07-13 20:11:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:52,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:52,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056216101] [2021-07-13 20:11:52,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056216101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:52,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313058288] [2021-07-13 20:11:52,034 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:52,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:11:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:11:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:52,239 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:52,239 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 17 [2021-07-13 20:11:52,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:52,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:52,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:52,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-07-13 20:11:52,407 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:52,408 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 29 treesize of output 13 [2021-07-13 20:11:52,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:52,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:52,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:52,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:52,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313058288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:52,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:52,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:52,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958402848] [2021-07-13 20:11:52,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:52,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:52,550 INFO L87 Difference]: Start difference. First operand 21909 states and 66158 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:54,806 INFO L93 Difference]: Finished difference Result 26122 states and 77506 transitions. [2021-07-13 20:11:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:11:54,806 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:54,867 INFO L225 Difference]: With dead ends: 26122 [2021-07-13 20:11:54,867 INFO L226 Difference]: Without dead ends: 25754 [2021-07-13 20:11:54,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1570.7ms TimeCoverageRelationStatistics Valid=291, Invalid=3491, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:11:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25754 states. [2021-07-13 20:11:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25754 to 21949. [2021-07-13 20:11:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21949 states, 21948 states have (on average 3.019045015491161) internal successors, (66262), 21948 states have internal predecessors, (66262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21949 states to 21949 states and 66262 transitions. [2021-07-13 20:11:55,387 INFO L78 Accepts]: Start accepts. Automaton has 21949 states and 66262 transitions. Word has length 54 [2021-07-13 20:11:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:55,388 INFO L482 AbstractCegarLoop]: Abstraction has 21949 states and 66262 transitions. [2021-07-13 20:11:55,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 21949 states and 66262 transitions. [2021-07-13 20:11:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:55,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:55,417 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:55,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-07-13 20:11:55,618 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2056173873, now seen corresponding path program 139 times [2021-07-13 20:11:55,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:55,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449187602] [2021-07-13 20:11:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:55,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:55,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449187602] [2021-07-13 20:11:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449187602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:55,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949471549] [2021-07-13 20:11:55,991 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:11:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:56,194 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:56,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15 [2021-07-13 20:11:56,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:56,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-07-13 20:11:56,359 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:56,359 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 25 treesize of output 13 [2021-07-13 20:11:56,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:56,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949471549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:56,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:56,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:11:56,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821877571] [2021-07-13 20:11:56,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:11:56,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:11:56,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:11:56,497 INFO L87 Difference]: Start difference. First operand 21949 states and 66262 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,295 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-07-13 20:11:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:58,770 INFO L93 Difference]: Finished difference Result 26161 states and 77609 transitions. [2021-07-13 20:11:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:11:58,770 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:58,826 INFO L225 Difference]: With dead ends: 26161 [2021-07-13 20:11:58,826 INFO L226 Difference]: Without dead ends: 25766 [2021-07-13 20:11:58,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1613.0ms TimeCoverageRelationStatistics Valid=305, Invalid=3727, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:11:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25766 states. [2021-07-13 20:11:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25766 to 21942. [2021-07-13 20:11:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21942 states, 21941 states have (on average 3.0191422451118908) internal successors, (66243), 21941 states have internal predecessors, (66243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21942 states to 21942 states and 66243 transitions. [2021-07-13 20:11:59,216 INFO L78 Accepts]: Start accepts. Automaton has 21942 states and 66243 transitions. Word has length 54 [2021-07-13 20:11:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:59,216 INFO L482 AbstractCegarLoop]: Abstraction has 21942 states and 66243 transitions. [2021-07-13 20:11:59,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 21942 states and 66243 transitions. [2021-07-13 20:11:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:59,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:59,246 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:59,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:59,447 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash -163018301, now seen corresponding path program 140 times [2021-07-13 20:11:59,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:59,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608914343] [2021-07-13 20:11:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:11:59,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:59,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608914343] [2021-07-13 20:11:59,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608914343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:59,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570138278] [2021-07-13 20:11:59,858 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:59,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:59,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:11:59,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:00,084 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:00,084 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 37 treesize of output 17 [2021-07-13 20:12:00,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:00,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:22 [2021-07-13 20:12:00,245 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:00,246 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 25 treesize of output 13 [2021-07-13 20:12:00,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:00,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:12:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:00,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570138278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:00,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:00,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-07-13 20:12:00,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280668529] [2021-07-13 20:12:00,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:12:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:12:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:12:00,387 INFO L87 Difference]: Start difference. First operand 21942 states and 66243 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:02,635 INFO L93 Difference]: Finished difference Result 25642 states and 76164 transitions. [2021-07-13 20:12:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:12:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:02,694 INFO L225 Difference]: With dead ends: 25642 [2021-07-13 20:12:02,695 INFO L226 Difference]: Without dead ends: 25251 [2021-07-13 20:12:02,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1599.2ms TimeCoverageRelationStatistics Valid=292, Invalid=3868, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:12:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25251 states. [2021-07-13 20:12:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25251 to 21921. [2021-07-13 20:12:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21921 states, 21920 states have (on average 3.019616788321168) internal successors, (66190), 21920 states have internal predecessors, (66190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21921 states to 21921 states and 66190 transitions. [2021-07-13 20:12:03,105 INFO L78 Accepts]: Start accepts. Automaton has 21921 states and 66190 transitions. Word has length 54 [2021-07-13 20:12:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:03,106 INFO L482 AbstractCegarLoop]: Abstraction has 21921 states and 66190 transitions. [2021-07-13 20:12:03,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 21921 states and 66190 transitions. [2021-07-13 20:12:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:03,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:03,136 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:03,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-07-13 20:12:03,336 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -122229045, now seen corresponding path program 141 times [2021-07-13 20:12:03,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:03,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945110568] [2021-07-13 20:12:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:03,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:03,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945110568] [2021-07-13 20:12:03,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945110568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:03,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488480443] [2021-07-13 20:12:03,752 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:03,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:12:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:12:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:04,150 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:04,150 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 31 treesize of output 15 [2021-07-13 20:12:04,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:04,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-13 20:12:04,324 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:04,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:12:04,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:04,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:12:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:04,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488480443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:04,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:04,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 39 [2021-07-13 20:12:04,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337795093] [2021-07-13 20:12:04,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:12:04,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:04,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:12:04,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:12:04,471 INFO L87 Difference]: Start difference. First operand 21921 states and 66190 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:07,051 INFO L93 Difference]: Finished difference Result 24717 states and 73758 transitions. [2021-07-13 20:12:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:12:07,051 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:07,104 INFO L225 Difference]: With dead ends: 24717 [2021-07-13 20:12:07,104 INFO L226 Difference]: Without dead ends: 24326 [2021-07-13 20:12:07,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1831.6ms TimeCoverageRelationStatistics Valid=333, Invalid=4779, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:12:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24326 states. [2021-07-13 20:12:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24326 to 22030. [2021-07-13 20:12:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22030 states, 22029 states have (on average 3.0175677516001636) internal successors, (66474), 22029 states have internal predecessors, (66474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22030 states to 22030 states and 66474 transitions. [2021-07-13 20:12:07,514 INFO L78 Accepts]: Start accepts. Automaton has 22030 states and 66474 transitions. Word has length 54 [2021-07-13 20:12:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:07,514 INFO L482 AbstractCegarLoop]: Abstraction has 22030 states and 66474 transitions. [2021-07-13 20:12:07,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 22030 states and 66474 transitions. [2021-07-13 20:12:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:07,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:07,544 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:07,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:07,753 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1465217285, now seen corresponding path program 142 times [2021-07-13 20:12:07,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:07,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599110673] [2021-07-13 20:12:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:08,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:08,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599110673] [2021-07-13 20:12:08,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599110673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:08,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148762833] [2021-07-13 20:12:08,205 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:08,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:08,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:08,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:12:08,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:08,612 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:08,612 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 37 treesize of output 17 [2021-07-13 20:12:08,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:08,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:08,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:08,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-07-13 20:12:08,688 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:08,688 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 27 treesize of output 13 [2021-07-13 20:12:08,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:08,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:08,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:08,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:12:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148762833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:08,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:08,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:12:08,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636361090] [2021-07-13 20:12:08,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:12:08,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:08,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:12:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:12:08,837 INFO L87 Difference]: Start difference. First operand 22030 states and 66474 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:10,539 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-07-13 20:12:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:11,134 INFO L93 Difference]: Finished difference Result 24881 states and 74266 transitions. [2021-07-13 20:12:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:12:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:11,187 INFO L225 Difference]: With dead ends: 24881 [2021-07-13 20:12:11,188 INFO L226 Difference]: Without dead ends: 24465 [2021-07-13 20:12:11,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1765.2ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:12:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24465 states. [2021-07-13 20:12:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24465 to 22235. [2021-07-13 20:12:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0135828011154087) internal successors, (67004), 22234 states have internal predecessors, (67004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67004 transitions. [2021-07-13 20:12:11,590 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67004 transitions. Word has length 54 [2021-07-13 20:12:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:11,590 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67004 transitions. [2021-07-13 20:12:11,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67004 transitions. [2021-07-13 20:12:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:11,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:11,620 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:11,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:11,821 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1938378277, now seen corresponding path program 143 times [2021-07-13 20:12:11,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:11,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059740311] [2021-07-13 20:12:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:12,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:12,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059740311] [2021-07-13 20:12:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059740311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:12,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626828354] [2021-07-13 20:12:12,302 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:12,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:12:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:12:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:12,892 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:12,892 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 29 treesize of output 17 [2021-07-13 20:12:12,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:12,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:12,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:12,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:35 [2021-07-13 20:12:13,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:13,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:13,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:13,095 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 25 treesize of output 13 [2021-07-13 20:12:13,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:13,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:13,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:13,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-07-13 20:12:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:13,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626828354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:13,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:13,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2021-07-13 20:12:13,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001445136] [2021-07-13 20:12:13,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:12:13,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:13,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:12:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:12:13,408 INFO L87 Difference]: Start difference. First operand 22235 states and 67004 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:16,197 INFO L93 Difference]: Finished difference Result 25017 states and 74620 transitions. [2021-07-13 20:12:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:12:16,197 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:16,254 INFO L225 Difference]: With dead ends: 25017 [2021-07-13 20:12:16,254 INFO L226 Difference]: Without dead ends: 24649 [2021-07-13 20:12:16,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2464.9ms TimeCoverageRelationStatistics Valid=367, Invalid=5183, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:12:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24649 states. [2021-07-13 20:12:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24649 to 22242. [2021-07-13 20:12:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22242 states, 22241 states have (on average 3.013308754102783) internal successors, (67019), 22241 states have internal predecessors, (67019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22242 states to 22242 states and 67019 transitions. [2021-07-13 20:12:16,672 INFO L78 Accepts]: Start accepts. Automaton has 22242 states and 67019 transitions. Word has length 54 [2021-07-13 20:12:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:16,673 INFO L482 AbstractCegarLoop]: Abstraction has 22242 states and 67019 transitions. [2021-07-13 20:12:16,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 22242 states and 67019 transitions. [2021-07-13 20:12:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:16,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:16,704 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:16,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:16,905 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1453474147, now seen corresponding path program 144 times [2021-07-13 20:12:16,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:16,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150259113] [2021-07-13 20:12:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:17,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:17,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150259113] [2021-07-13 20:12:17,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150259113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:17,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953604133] [2021-07-13 20:12:17,298 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:17,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:12:17,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:12:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:17,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:17,603 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 17 [2021-07-13 20:12:17,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:17,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:17,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:17,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:12:17,715 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:17,715 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 29 treesize of output 13 [2021-07-13 20:12:17,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:17,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:17,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:17,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:12:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:17,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953604133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:17,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:17,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:12:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445453145] [2021-07-13 20:12:17,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:17,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:17,865 INFO L87 Difference]: Start difference. First operand 22242 states and 67019 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:20,084 INFO L93 Difference]: Finished difference Result 25128 states and 74914 transitions. [2021-07-13 20:12:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:12:20,085 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:20,137 INFO L225 Difference]: With dead ends: 25128 [2021-07-13 20:12:20,138 INFO L226 Difference]: Without dead ends: 24717 [2021-07-13 20:12:20,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1675.5ms TimeCoverageRelationStatistics Valid=277, Invalid=3629, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:12:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24717 states. [2021-07-13 20:12:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24717 to 22207. [2021-07-13 20:12:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22207 states, 22206 states have (on average 3.0139601909393856) internal successors, (66928), 22206 states have internal predecessors, (66928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22207 states to 22207 states and 66928 transitions. [2021-07-13 20:12:20,525 INFO L78 Accepts]: Start accepts. Automaton has 22207 states and 66928 transitions. Word has length 54 [2021-07-13 20:12:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:20,525 INFO L482 AbstractCegarLoop]: Abstraction has 22207 states and 66928 transitions. [2021-07-13 20:12:20,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 22207 states and 66928 transitions. [2021-07-13 20:12:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:20,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:20,558 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:20,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 20:12:20,758 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2115347105, now seen corresponding path program 145 times [2021-07-13 20:12:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:20,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657269000] [2021-07-13 20:12:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:21,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:21,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657269000] [2021-07-13 20:12:21,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657269000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:21,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997199537] [2021-07-13 20:12:21,142 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:12:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:21,413 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:21,413 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 37 treesize of output 17 [2021-07-13 20:12:21,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:21,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:21,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:21,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-07-13 20:12:21,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:21,563 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 27 treesize of output 13 [2021-07-13 20:12:21,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:21,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:21,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:21,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:12:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:21,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997199537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:21,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:21,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:12:21,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745184682] [2021-07-13 20:12:21,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:21,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:21,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:21,709 INFO L87 Difference]: Start difference. First operand 22207 states and 66928 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:23,849 INFO L93 Difference]: Finished difference Result 26041 states and 77324 transitions. [2021-07-13 20:12:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:12:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:23,904 INFO L225 Difference]: With dead ends: 26041 [2021-07-13 20:12:23,905 INFO L226 Difference]: Without dead ends: 25673 [2021-07-13 20:12:23,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1555.1ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:12:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25673 states. [2021-07-13 20:12:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25673 to 22235. [2021-07-13 20:12:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0134028964648736) internal successors, (67000), 22234 states have internal predecessors, (67000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67000 transitions. [2021-07-13 20:12:24,312 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67000 transitions. Word has length 54 [2021-07-13 20:12:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67000 transitions. [2021-07-13 20:12:24,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67000 transitions. [2021-07-13 20:12:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:24,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:24,342 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:24,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 20:12:24,542 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1212232233, now seen corresponding path program 146 times [2021-07-13 20:12:24,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:24,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854317247] [2021-07-13 20:12:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:24,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:24,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854317247] [2021-07-13 20:12:24,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854317247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:24,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147257482] [2021-07-13 20:12:24,932 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:24,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:24,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:24,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:12:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:25,199 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:25,199 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 15 [2021-07-13 20:12:25,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:25,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-07-13 20:12:25,338 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:25,338 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 25 treesize of output 13 [2021-07-13 20:12:25,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:25,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:12:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:25,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147257482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:25,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:25,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:12:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412724938] [2021-07-13 20:12:25,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:25,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:25,486 INFO L87 Difference]: Start difference. First operand 22235 states and 67000 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:27,618 INFO L93 Difference]: Finished difference Result 25976 states and 77153 transitions. [2021-07-13 20:12:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:12:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:27,674 INFO L225 Difference]: With dead ends: 25976 [2021-07-13 20:12:27,674 INFO L226 Difference]: Without dead ends: 25581 [2021-07-13 20:12:27,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1589.0ms TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:12:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25581 states. [2021-07-13 20:12:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25581 to 22228. [2021-07-13 20:12:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22228 states, 22227 states have (on average 3.0134970981239033) internal successors, (66981), 22227 states have internal predecessors, (66981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22228 states to 22228 states and 66981 transitions. [2021-07-13 20:12:28,204 INFO L78 Accepts]: Start accepts. Automaton has 22228 states and 66981 transitions. Word has length 54 [2021-07-13 20:12:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:28,204 INFO L482 AbstractCegarLoop]: Abstraction has 22228 states and 66981 transitions. [2021-07-13 20:12:28,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 22228 states and 66981 transitions. [2021-07-13 20:12:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:28,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:28,233 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:28,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:28,434 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:28,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:28,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1006959941, now seen corresponding path program 147 times [2021-07-13 20:12:28,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:28,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146308175] [2021-07-13 20:12:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:28,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:28,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146308175] [2021-07-13 20:12:28,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146308175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:28,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869596387] [2021-07-13 20:12:28,805 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:28,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:12:28,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:28,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:12:28,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:29,074 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:29,074 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 31 treesize of output 15 [2021-07-13 20:12:29,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:29,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:29,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:29,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:12:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:29,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:29,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:29,318 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 27 treesize of output 25 [2021-07-13 20:12:29,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:29,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:29,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:29,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-07-13 20:12:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:29,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869596387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:29,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:29,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 40 [2021-07-13 20:12:29,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304382933] [2021-07-13 20:12:29,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:12:29,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:12:29,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:12:29,569 INFO L87 Difference]: Start difference. First operand 22228 states and 66981 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:32,427 INFO L93 Difference]: Finished difference Result 25548 states and 75863 transitions. [2021-07-13 20:12:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:12:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:32,597 INFO L225 Difference]: With dead ends: 25548 [2021-07-13 20:12:32,597 INFO L226 Difference]: Without dead ends: 25287 [2021-07-13 20:12:32,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 2184.6ms TimeCoverageRelationStatistics Valid=403, Invalid=5603, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:12:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25287 states. [2021-07-13 20:12:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25287 to 22500. [2021-07-13 20:12:32,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22500 states, 22499 states have (on average 3.00857815902929) internal successors, (67690), 22499 states have internal predecessors, (67690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22500 states to 22500 states and 67690 transitions. [2021-07-13 20:12:32,944 INFO L78 Accepts]: Start accepts. Automaton has 22500 states and 67690 transitions. Word has length 54 [2021-07-13 20:12:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:32,944 INFO L482 AbstractCegarLoop]: Abstraction has 22500 states and 67690 transitions. [2021-07-13 20:12:32,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 22500 states and 67690 transitions. [2021-07-13 20:12:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:32,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:32,976 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:33,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-07-13 20:12:33,176 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash 203686157, now seen corresponding path program 148 times [2021-07-13 20:12:33,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:33,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441358008] [2021-07-13 20:12:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:33,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:33,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441358008] [2021-07-13 20:12:33,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441358008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:33,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069043353] [2021-07-13 20:12:33,528 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:33,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:33,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:12:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:33,791 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:33,791 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 15 [2021-07-13 20:12:33,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:33,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:33,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:33,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:25 [2021-07-13 20:12:33,927 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:33,927 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 29 treesize of output 13 [2021-07-13 20:12:33,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:33,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:33,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:33,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:12:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:34,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069043353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:34,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:34,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:12:34,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514438330] [2021-07-13 20:12:34,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:34,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:34,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:34,074 INFO L87 Difference]: Start difference. First operand 22500 states and 67690 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:36,256 INFO L93 Difference]: Finished difference Result 24992 states and 74488 transitions. [2021-07-13 20:12:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:12:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:36,311 INFO L225 Difference]: With dead ends: 24992 [2021-07-13 20:12:36,311 INFO L226 Difference]: Without dead ends: 24658 [2021-07-13 20:12:36,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1556.2ms TimeCoverageRelationStatistics Valid=284, Invalid=3748, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:12:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24658 states. [2021-07-13 20:12:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24658 to 22054. [2021-07-13 20:12:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22054 states, 22053 states have (on average 3.017730014057044) internal successors, (66550), 22053 states have internal predecessors, (66550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 66550 transitions. [2021-07-13 20:12:36,700 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 66550 transitions. Word has length 54 [2021-07-13 20:12:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:36,700 INFO L482 AbstractCegarLoop]: Abstraction has 22054 states and 66550 transitions. [2021-07-13 20:12:36,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 66550 transitions. [2021-07-13 20:12:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:36,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:36,732 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:36,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:36,932 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -693359873, now seen corresponding path program 149 times [2021-07-13 20:12:36,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:36,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829958357] [2021-07-13 20:12:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:37,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:37,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829958357] [2021-07-13 20:12:37,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829958357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837752395] [2021-07-13 20:12:37,356 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:37,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:12:37,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:12:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:37,698 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:37,698 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 17 [2021-07-13 20:12:37,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:37,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:37,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:37,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:12:37,774 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:37,775 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 25 treesize of output 13 [2021-07-13 20:12:37,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:37,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:37,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:37,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:12:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837752395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:37,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:37,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-07-13 20:12:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581210249] [2021-07-13 20:12:37,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:12:37,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:37,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:12:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1444, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:12:37,977 INFO L87 Difference]: Start difference. First operand 22054 states and 66550 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:40,276 INFO L93 Difference]: Finished difference Result 24806 states and 73840 transitions. [2021-07-13 20:12:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:12:40,277 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:40,329 INFO L225 Difference]: With dead ends: 24806 [2021-07-13 20:12:40,329 INFO L226 Difference]: Without dead ends: 24563 [2021-07-13 20:12:40,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1634.5ms TimeCoverageRelationStatistics Valid=298, Invalid=3862, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:12:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24563 states. [2021-07-13 20:12:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24563 to 22257. [2021-07-13 20:12:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22257 states, 22256 states have (on average 3.0134345794392523) internal successors, (67067), 22256 states have internal predecessors, (67067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22257 states to 22257 states and 67067 transitions. [2021-07-13 20:12:40,851 INFO L78 Accepts]: Start accepts. Automaton has 22257 states and 67067 transitions. Word has length 54 [2021-07-13 20:12:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:40,851 INFO L482 AbstractCegarLoop]: Abstraction has 22257 states and 67067 transitions. [2021-07-13 20:12:40,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22257 states and 67067 transitions. [2021-07-13 20:12:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:40,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:40,884 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:41,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:41,084 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1413361191, now seen corresponding path program 150 times [2021-07-13 20:12:41,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:41,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852155324] [2021-07-13 20:12:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:41,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:41,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852155324] [2021-07-13 20:12:41,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852155324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:41,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175469046] [2021-07-13 20:12:41,559 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:41,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:12:41,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:12:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:42,037 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 31 treesize of output 17 [2021-07-13 20:12:42,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:42,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:42,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:42,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:27 [2021-07-13 20:12:42,117 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:42,117 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 25 treesize of output 13 [2021-07-13 20:12:42,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:42,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:42,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:42,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:12:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:42,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175469046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:42,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:42,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2021-07-13 20:12:42,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897605116] [2021-07-13 20:12:42,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:12:42,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:42,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:12:42,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1599, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:12:42,323 INFO L87 Difference]: Start difference. First operand 22257 states and 67067 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:45,473 INFO L93 Difference]: Finished difference Result 23878 states and 71393 transitions. [2021-07-13 20:12:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:12:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:45,522 INFO L225 Difference]: With dead ends: 23878 [2021-07-13 20:12:45,523 INFO L226 Difference]: Without dead ends: 23368 [2021-07-13 20:12:45,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2519.8ms TimeCoverageRelationStatistics Valid=446, Invalid=6034, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:12:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23368 states. [2021-07-13 20:12:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23368 to 22136. [2021-07-13 20:12:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22136 states, 22135 states have (on average 3.0159475943076575) internal successors, (66758), 22135 states have internal predecessors, (66758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22136 states to 22136 states and 66758 transitions. [2021-07-13 20:12:45,928 INFO L78 Accepts]: Start accepts. Automaton has 22136 states and 66758 transitions. Word has length 54 [2021-07-13 20:12:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:45,928 INFO L482 AbstractCegarLoop]: Abstraction has 22136 states and 66758 transitions. [2021-07-13 20:12:45,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 22136 states and 66758 transitions. [2021-07-13 20:12:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:45,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:45,962 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:46,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:46,163 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:46,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:46,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1166520865, now seen corresponding path program 151 times [2021-07-13 20:12:46,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:46,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165357084] [2021-07-13 20:12:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:46,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:46,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165357084] [2021-07-13 20:12:46,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165357084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:46,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267443838] [2021-07-13 20:12:46,544 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:12:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:46,846 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:46,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-07-13 20:12:46,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:46,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-07-13 20:12:46,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:12:46,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:46,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:12:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:47,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267443838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:47,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:47,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:12:47,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045112137] [2021-07-13 20:12:47,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:47,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:47,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:47,111 INFO L87 Difference]: Start difference. First operand 22136 states and 66758 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:49,566 INFO L93 Difference]: Finished difference Result 25163 states and 74770 transitions. [2021-07-13 20:12:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:12:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:49,624 INFO L225 Difference]: With dead ends: 25163 [2021-07-13 20:12:49,625 INFO L226 Difference]: Without dead ends: 24825 [2021-07-13 20:12:49,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1565.5ms TimeCoverageRelationStatistics Valid=280, Invalid=3626, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:12:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24825 states. [2021-07-13 20:12:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24825 to 22219. [2021-07-13 20:12:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22219 states, 22218 states have (on average 3.0139976595553155) internal successors, (66965), 22218 states have internal predecessors, (66965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22219 states to 22219 states and 66965 transitions. [2021-07-13 20:12:50,038 INFO L78 Accepts]: Start accepts. Automaton has 22219 states and 66965 transitions. Word has length 54 [2021-07-13 20:12:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:50,038 INFO L482 AbstractCegarLoop]: Abstraction has 22219 states and 66965 transitions. [2021-07-13 20:12:50,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22219 states and 66965 transitions. [2021-07-13 20:12:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:50,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:50,071 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:50,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:50,271 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:50,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2069635737, now seen corresponding path program 152 times [2021-07-13 20:12:50,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:50,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521315617] [2021-07-13 20:12:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:50,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:50,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521315617] [2021-07-13 20:12:50,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521315617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:50,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832168736] [2021-07-13 20:12:50,645 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:50,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:50,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:12:50,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:50,959 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:50,959 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 37 treesize of output 17 [2021-07-13 20:12:50,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:50,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:50,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:50,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-07-13 20:12:51,151 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:51,151 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 27 treesize of output 13 [2021-07-13 20:12:51,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:51,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:51,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:51,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:12:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832168736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:51,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:51,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:12:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806280302] [2021-07-13 20:12:51,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:12:51,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:12:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:12:51,302 INFO L87 Difference]: Start difference. First operand 22219 states and 66965 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:53,899 INFO L93 Difference]: Finished difference Result 25274 states and 75061 transitions. [2021-07-13 20:12:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:12:53,899 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:53,959 INFO L225 Difference]: With dead ends: 25274 [2021-07-13 20:12:53,959 INFO L226 Difference]: Without dead ends: 24893 [2021-07-13 20:12:53,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1710.4ms TimeCoverageRelationStatistics Valid=294, Invalid=3996, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:12:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24893 states. [2021-07-13 20:12:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24893 to 22199. [2021-07-13 20:12:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22199 states, 22198 states have (on average 3.014415713127309) internal successors, (66914), 22198 states have internal predecessors, (66914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22199 states to 22199 states and 66914 transitions. [2021-07-13 20:12:54,355 INFO L78 Accepts]: Start accepts. Automaton has 22199 states and 66914 transitions. Word has length 54 [2021-07-13 20:12:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:54,355 INFO L482 AbstractCegarLoop]: Abstraction has 22199 states and 66914 transitions. [2021-07-13 20:12:54,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 22199 states and 66914 transitions. [2021-07-13 20:12:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:54,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:54,387 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:54,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 20:12:54,588 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1407762779, now seen corresponding path program 153 times [2021-07-13 20:12:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:54,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413220750] [2021-07-13 20:12:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:55,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:55,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413220750] [2021-07-13 20:12:55,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413220750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:55,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880334266] [2021-07-13 20:12:55,022 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:55,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:12:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:12:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:55,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:55,464 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 29 treesize of output 15 [2021-07-13 20:12:55,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:55,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:55,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:55,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-07-13 20:12:55,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:55,606 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 25 treesize of output 13 [2021-07-13 20:12:55,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:55,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:55,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:55,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:12:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:55,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880334266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:55,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:55,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-07-13 20:12:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909054811] [2021-07-13 20:12:55,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:12:55,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:55,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:12:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:12:55,754 INFO L87 Difference]: Start difference. First operand 22199 states and 66914 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:58,481 INFO L93 Difference]: Finished difference Result 23745 states and 71044 transitions. [2021-07-13 20:12:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:12:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:58,530 INFO L225 Difference]: With dead ends: 23745 [2021-07-13 20:12:58,530 INFO L226 Difference]: Without dead ends: 23407 [2021-07-13 20:12:58,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2253.9ms TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:12:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23407 states. [2021-07-13 20:12:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23407 to 22215. [2021-07-13 20:12:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22215 states, 22214 states have (on average 3.0140451967227873) internal successors, (66954), 22214 states have internal predecessors, (66954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22215 states to 22215 states and 66954 transitions. [2021-07-13 20:12:58,921 INFO L78 Accepts]: Start accepts. Automaton has 22215 states and 66954 transitions. Word has length 54 [2021-07-13 20:12:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:58,921 INFO L482 AbstractCegarLoop]: Abstraction has 22215 states and 66954 transitions. [2021-07-13 20:12:58,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 22215 states and 66954 transitions. [2021-07-13 20:12:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:58,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:58,951 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:59,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-13 20:12:59,152 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1984089645, now seen corresponding path program 154 times [2021-07-13 20:12:59,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:59,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000530010] [2021-07-13 20:12:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:12:59,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:59,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000530010] [2021-07-13 20:12:59,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000530010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:59,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653934489] [2021-07-13 20:12:59,505 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:59,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:12:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:59,779 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:59,780 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 15 [2021-07-13 20:12:59,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:59,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:59,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:59,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-07-13 20:12:59,919 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:59,919 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 25 treesize of output 13 [2021-07-13 20:12:59,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:59,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:59,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:59,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:13:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:00,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653934489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:00,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:00,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:13:00,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329153831] [2021-07-13 20:13:00,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:00,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:00,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:00,067 INFO L87 Difference]: Start difference. First operand 22215 states and 66954 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:02,335 INFO L93 Difference]: Finished difference Result 25256 states and 75009 transitions. [2021-07-13 20:13:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:13:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:02,392 INFO L225 Difference]: With dead ends: 25256 [2021-07-13 20:13:02,393 INFO L226 Difference]: Without dead ends: 24891 [2021-07-13 20:13:02,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1607.5ms TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:13:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24891 states. [2021-07-13 20:13:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24891 to 22227. [2021-07-13 20:13:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22227 states, 22226 states have (on average 3.013722667146585) internal successors, (66983), 22226 states have internal predecessors, (66983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22227 states to 22227 states and 66983 transitions. [2021-07-13 20:13:02,810 INFO L78 Accepts]: Start accepts. Automaton has 22227 states and 66983 transitions. Word has length 54 [2021-07-13 20:13:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:02,811 INFO L482 AbstractCegarLoop]: Abstraction has 22227 states and 66983 transitions. [2021-07-13 20:13:02,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22227 states and 66983 transitions. [2021-07-13 20:13:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:02,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:02,842 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:03,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-07-13 20:13:03,042 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:03,043 INFO L82 PathProgramCache]: Analyzing trace with hash -235102529, now seen corresponding path program 155 times [2021-07-13 20:13:03,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:03,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743713676] [2021-07-13 20:13:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:03,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743713676] [2021-07-13 20:13:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743713676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933253500] [2021-07-13 20:13:03,397 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:03,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:13:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:13:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:03,679 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:03,679 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 17 [2021-07-13 20:13:03,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:03,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:13:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:03,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:03,857 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 13 [2021-07-13 20:13:03,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:03,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-07-13 20:13:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:04,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933253500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:04,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:04,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:13:04,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289158876] [2021-07-13 20:13:04,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:13:04,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:04,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:13:04,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:13:04,072 INFO L87 Difference]: Start difference. First operand 22227 states and 66983 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:07,023 INFO L93 Difference]: Finished difference Result 24700 states and 73543 transitions. [2021-07-13 20:13:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:13:07,024 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:07,075 INFO L225 Difference]: With dead ends: 24700 [2021-07-13 20:13:07,075 INFO L226 Difference]: Without dead ends: 24479 [2021-07-13 20:13:07,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1846.0ms TimeCoverageRelationStatistics Valid=331, Invalid=4639, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:13:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24479 states. [2021-07-13 20:13:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24479 to 22360. [2021-07-13 20:13:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22360 states, 22359 states have (on average 3.010912831521982) internal successors, (67321), 22359 states have internal predecessors, (67321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22360 states to 22360 states and 67321 transitions. [2021-07-13 20:13:07,480 INFO L78 Accepts]: Start accepts. Automaton has 22360 states and 67321 transitions. Word has length 54 [2021-07-13 20:13:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:07,480 INFO L482 AbstractCegarLoop]: Abstraction has 22360 states and 67321 transitions. [2021-07-13 20:13:07,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:07,480 INFO L276 IsEmpty]: Start isEmpty. Operand 22360 states and 67321 transitions. [2021-07-13 20:13:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:07,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:07,511 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:07,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:07,711 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash 183420517, now seen corresponding path program 156 times [2021-07-13 20:13:07,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:07,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272782743] [2021-07-13 20:13:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:08,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272782743] [2021-07-13 20:13:08,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272782743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917441019] [2021-07-13 20:13:08,075 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:08,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:13:08,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:13:08,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:08,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:08,453 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 29 treesize of output 15 [2021-07-13 20:13:08,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:08,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:08,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:08,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-07-13 20:13:08,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:08,706 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-07-13 20:13:08,706 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 27 treesize of output 23 [2021-07-13 20:13:08,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:08,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:08,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:08,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2021-07-13 20:13:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:09,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917441019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:09,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:09,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 42 [2021-07-13 20:13:09,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007985723] [2021-07-13 20:13:09,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:09,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:09,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:09,019 INFO L87 Difference]: Start difference. First operand 22360 states and 67321 transitions. Second operand has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:13,467 INFO L93 Difference]: Finished difference Result 24159 states and 72084 transitions. [2021-07-13 20:13:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:13:13,467 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:13,515 INFO L225 Difference]: With dead ends: 24159 [2021-07-13 20:13:13,515 INFO L226 Difference]: Without dead ends: 23550 [2021-07-13 20:13:13,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 3481.7ms TimeCoverageRelationStatistics Valid=590, Invalid=9112, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:13:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23550 states. [2021-07-13 20:13:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23550 to 22303. [2021-07-13 20:13:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22303 states, 22302 states have (on average 3.0117478253071472) internal successors, (67168), 22302 states have internal predecessors, (67168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22303 states to 22303 states and 67168 transitions. [2021-07-13 20:13:13,888 INFO L78 Accepts]: Start accepts. Automaton has 22303 states and 67168 transitions. Word has length 54 [2021-07-13 20:13:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:13,888 INFO L482 AbstractCegarLoop]: Abstraction has 22303 states and 67168 transitions. [2021-07-13 20:13:13,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 22303 states and 67168 transitions. [2021-07-13 20:13:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:13,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:13,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:14,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-07-13 20:13:14,117 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash -18068553, now seen corresponding path program 157 times [2021-07-13 20:13:14,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:14,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819919763] [2021-07-13 20:13:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:14,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:14,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819919763] [2021-07-13 20:13:14,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819919763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:14,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246185225] [2021-07-13 20:13:14,474 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:13:14,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:14,796 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:14,796 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 15 [2021-07-13 20:13:14,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:14,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:14,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:14,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:25 [2021-07-13 20:13:14,957 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:14,957 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 33 treesize of output 13 [2021-07-13 20:13:14,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:14,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:14,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:14,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:13:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:15,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246185225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:15,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:15,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:13:15,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319232647] [2021-07-13 20:13:15,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:15,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:15,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:15,094 INFO L87 Difference]: Start difference. First operand 22303 states and 67168 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:17,355 INFO L93 Difference]: Finished difference Result 24903 states and 74037 transitions. [2021-07-13 20:13:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:13:17,356 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:17,407 INFO L225 Difference]: With dead ends: 24903 [2021-07-13 20:13:17,407 INFO L226 Difference]: Without dead ends: 24675 [2021-07-13 20:13:17,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1580.5ms TimeCoverageRelationStatistics Valid=281, Invalid=3751, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:13:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24675 states. [2021-07-13 20:13:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24675 to 22231. [2021-07-13 20:13:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22231 states, 22230 states have (on average 3.0136752136752136) internal successors, (66994), 22230 states have internal predecessors, (66994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22231 states to 22231 states and 66994 transitions. [2021-07-13 20:13:17,779 INFO L78 Accepts]: Start accepts. Automaton has 22231 states and 66994 transitions. Word has length 54 [2021-07-13 20:13:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:17,779 INFO L482 AbstractCegarLoop]: Abstraction has 22231 states and 66994 transitions. [2021-07-13 20:13:17,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 22231 states and 66994 transitions. [2021-07-13 20:13:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:17,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:17,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:18,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:18,008 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2143963383, now seen corresponding path program 158 times [2021-07-13 20:13:18,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:18,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24796769] [2021-07-13 20:13:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:18,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:18,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24796769] [2021-07-13 20:13:18,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24796769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:18,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112466193] [2021-07-13 20:13:18,491 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:18,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:18,840 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:18,841 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 37 treesize of output 17 [2021-07-13 20:13:18,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:18,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:18,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:18,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-07-13 20:13:18,919 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:18,919 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 29 treesize of output 13 [2021-07-13 20:13:18,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:18,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:18,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:18,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:19,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112466193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:19,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:19,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:13:19,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971100345] [2021-07-13 20:13:19,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:13:19,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:13:19,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:13:19,071 INFO L87 Difference]: Start difference. First operand 22231 states and 66994 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:21,836 INFO L93 Difference]: Finished difference Result 26141 states and 77673 transitions. [2021-07-13 20:13:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:13:21,836 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:21,892 INFO L225 Difference]: With dead ends: 26141 [2021-07-13 20:13:21,892 INFO L226 Difference]: Without dead ends: 25755 [2021-07-13 20:13:21,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1822.6ms TimeCoverageRelationStatistics Valid=298, Invalid=3862, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:13:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25755 states. [2021-07-13 20:13:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25755 to 22307. [2021-07-13 20:13:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22307 states, 22306 states have (on average 3.012732000358648) internal successors, (67202), 22306 states have internal predecessors, (67202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22307 states to 22307 states and 67202 transitions. [2021-07-13 20:13:22,274 INFO L78 Accepts]: Start accepts. Automaton has 22307 states and 67202 transitions. Word has length 54 [2021-07-13 20:13:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:22,274 INFO L482 AbstractCegarLoop]: Abstraction has 22307 states and 67202 transitions. [2021-07-13 20:13:22,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 22307 states and 67202 transitions. [2021-07-13 20:13:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:22,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:22,307 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:22,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:22,507 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:22,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1677842921, now seen corresponding path program 159 times [2021-07-13 20:13:22,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:22,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366716946] [2021-07-13 20:13:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:22,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:22,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366716946] [2021-07-13 20:13:22,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366716946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:22,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808512454] [2021-07-13 20:13:22,893 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:22,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:13:22,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:22,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:23,322 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:23,322 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 17 [2021-07-13 20:13:23,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:23,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:23,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:23,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:13:23,436 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:23,436 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 29 treesize of output 13 [2021-07-13 20:13:23,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:23,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:23,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:23,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:23,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808512454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:23,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:23,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:13:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241033625] [2021-07-13 20:13:23,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:13:23,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:23,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:13:23,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:13:23,581 INFO L87 Difference]: Start difference. First operand 22307 states and 67202 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:26,359 INFO L93 Difference]: Finished difference Result 26360 states and 78247 transitions. [2021-07-13 20:13:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:13:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:26,416 INFO L225 Difference]: With dead ends: 26360 [2021-07-13 20:13:26,416 INFO L226 Difference]: Without dead ends: 26022 [2021-07-13 20:13:26,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1719.6ms TimeCoverageRelationStatistics Valid=312, Invalid=3978, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:13:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26022 states. [2021-07-13 20:13:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26022 to 22291. [2021-07-13 20:13:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22291 states, 22290 states have (on average 3.013638402871243) internal successors, (67174), 22290 states have internal predecessors, (67174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22291 states to 22291 states and 67174 transitions. [2021-07-13 20:13:26,796 INFO L78 Accepts]: Start accepts. Automaton has 22291 states and 67174 transitions. Word has length 54 [2021-07-13 20:13:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:26,796 INFO L482 AbstractCegarLoop]: Abstraction has 22291 states and 67174 transitions. [2021-07-13 20:13:26,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 22291 states and 67174 transitions. [2021-07-13 20:13:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:26,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:26,825 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:27,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-07-13 20:13:27,026 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash 774728049, now seen corresponding path program 160 times [2021-07-13 20:13:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:27,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797340961] [2021-07-13 20:13:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:27,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:27,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797340961] [2021-07-13 20:13:27,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797340961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:27,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533059627] [2021-07-13 20:13:27,423 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:27,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:27,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:27,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:27,751 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:27,751 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 37 treesize of output 17 [2021-07-13 20:13:27,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:27,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:27,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:27,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-07-13 20:13:27,866 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:27,866 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 25 treesize of output 13 [2021-07-13 20:13:27,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:27,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:27,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:27,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:13:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:28,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533059627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:28,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:28,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:13:28,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744526185] [2021-07-13 20:13:28,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:28,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:28,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:28,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:28,175 INFO L87 Difference]: Start difference. First operand 22291 states and 67174 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:30,776 INFO L93 Difference]: Finished difference Result 26457 states and 78508 transitions. [2021-07-13 20:13:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:13:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:30,837 INFO L225 Difference]: With dead ends: 26457 [2021-07-13 20:13:30,837 INFO L226 Difference]: Without dead ends: 26076 [2021-07-13 20:13:30,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1897.3ms TimeCoverageRelationStatistics Valid=289, Invalid=3871, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:13:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26076 states. [2021-07-13 20:13:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26076 to 22291. [2021-07-13 20:13:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22291 states, 22290 states have (on average 3.012920592193809) internal successors, (67158), 22290 states have internal predecessors, (67158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22291 states to 22291 states and 67158 transitions. [2021-07-13 20:13:31,345 INFO L78 Accepts]: Start accepts. Automaton has 22291 states and 67158 transitions. Word has length 54 [2021-07-13 20:13:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:31,345 INFO L482 AbstractCegarLoop]: Abstraction has 22291 states and 67158 transitions. [2021-07-13 20:13:31,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 22291 states and 67158 transitions. [2021-07-13 20:13:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:31,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:31,376 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:31,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 20:13:31,576 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -235438349, now seen corresponding path program 161 times [2021-07-13 20:13:31,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:31,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445605422] [2021-07-13 20:13:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:31,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445605422] [2021-07-13 20:13:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445605422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460282345] [2021-07-13 20:13:31,982 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:32,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:13:32,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:32,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:13:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:32,273 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:32,273 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 17 [2021-07-13 20:13:32,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:32,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:32,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:32,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:13:32,419 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:32,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:13:32,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:32,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:32,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:32,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:13:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:32,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460282345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:32,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:32,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:13:32,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702360743] [2021-07-13 20:13:32,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:13:32,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:32,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:13:32,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:13:32,623 INFO L87 Difference]: Start difference. First operand 22291 states and 67158 transitions. Second operand has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 38 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:35,190 INFO L93 Difference]: Finished difference Result 26085 states and 77525 transitions. [2021-07-13 20:13:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:13:35,191 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 38 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:35,251 INFO L225 Difference]: With dead ends: 26085 [2021-07-13 20:13:35,251 INFO L226 Difference]: Without dead ends: 25842 [2021-07-13 20:13:35,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1790.7ms TimeCoverageRelationStatistics Valid=308, Invalid=3982, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:13:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25842 states. [2021-07-13 20:13:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25842 to 22383. [2021-07-13 20:13:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22383 states, 22382 states have (on average 3.0107675810919488) internal successors, (67387), 22382 states have internal predecessors, (67387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22383 states to 22383 states and 67387 transitions. [2021-07-13 20:13:35,669 INFO L78 Accepts]: Start accepts. Automaton has 22383 states and 67387 transitions. Word has length 54 [2021-07-13 20:13:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:35,669 INFO L482 AbstractCegarLoop]: Abstraction has 22383 states and 67387 transitions. [2021-07-13 20:13:35,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 38 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 22383 states and 67387 transitions. [2021-07-13 20:13:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:35,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:35,700 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:35,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:35,900 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:35,900 INFO L82 PathProgramCache]: Analyzing trace with hash -955439667, now seen corresponding path program 162 times [2021-07-13 20:13:35,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:35,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450925426] [2021-07-13 20:13:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:36,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450925426] [2021-07-13 20:13:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450925426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610994967] [2021-07-13 20:13:36,264 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:36,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:13:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:36,540 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:36,541 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 33 treesize of output 17 [2021-07-13 20:13:36,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:36,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:36,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:36,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:13:36,682 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:36,682 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 29 treesize of output 13 [2021-07-13 20:13:36,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:36,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:36,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:36,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:36,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610994967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:36,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:36,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:13:36,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98055521] [2021-07-13 20:13:36,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:13:36,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:13:36,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:13:36,886 INFO L87 Difference]: Start difference. First operand 22383 states and 67387 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:39,345 INFO L93 Difference]: Finished difference Result 26299 states and 78090 transitions. [2021-07-13 20:13:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:13:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:39,406 INFO L225 Difference]: With dead ends: 26299 [2021-07-13 20:13:39,407 INFO L226 Difference]: Without dead ends: 26009 [2021-07-13 20:13:39,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1742.9ms TimeCoverageRelationStatistics Valid=324, Invalid=4232, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:13:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26009 states. [2021-07-13 20:13:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26009 to 22303. [2021-07-13 20:13:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22303 states, 22302 states have (on average 3.0127791229486145) internal successors, (67191), 22302 states have internal predecessors, (67191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22303 states to 22303 states and 67191 transitions. [2021-07-13 20:13:39,822 INFO L78 Accepts]: Start accepts. Automaton has 22303 states and 67191 transitions. Word has length 54 [2021-07-13 20:13:39,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:39,822 INFO L482 AbstractCegarLoop]: Abstraction has 22303 states and 67191 transitions. [2021-07-13 20:13:39,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 22303 states and 67191 transitions. [2021-07-13 20:13:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:39,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:39,851 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:40,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:13:40,052 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:40,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1138553221, now seen corresponding path program 163 times [2021-07-13 20:13:40,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:40,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105972458] [2021-07-13 20:13:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:40,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:40,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105972458] [2021-07-13 20:13:40,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105972458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:40,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544680597] [2021-07-13 20:13:40,439 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:40,714 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:40,714 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 15 [2021-07-13 20:13:40,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:40,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-07-13 20:13:40,858 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:40,858 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 29 treesize of output 13 [2021-07-13 20:13:40,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:40,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:41,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544680597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:41,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:41,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:13:41,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852424538] [2021-07-13 20:13:41,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:41,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:41,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:41,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:41,018 INFO L87 Difference]: Start difference. First operand 22303 states and 67191 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:43,844 INFO L93 Difference]: Finished difference Result 26427 states and 78427 transitions. [2021-07-13 20:13:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:13:43,845 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:43,903 INFO L225 Difference]: With dead ends: 26427 [2021-07-13 20:13:43,903 INFO L226 Difference]: Without dead ends: 26062 [2021-07-13 20:13:43,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1744.9ms TimeCoverageRelationStatistics Valid=303, Invalid=3987, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:13:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26062 states. [2021-07-13 20:13:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26062 to 22303. [2021-07-13 20:13:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22303 states, 22302 states have (on average 3.012599766837055) internal successors, (67187), 22302 states have internal predecessors, (67187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22303 states to 22303 states and 67187 transitions. [2021-07-13 20:13:44,277 INFO L78 Accepts]: Start accepts. Automaton has 22303 states and 67187 transitions. Word has length 54 [2021-07-13 20:13:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:44,277 INFO L482 AbstractCegarLoop]: Abstraction has 22303 states and 67187 transitions. [2021-07-13 20:13:44,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 22303 states and 67187 transitions. [2021-07-13 20:13:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:44,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:44,308 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:44,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 20:13:44,508 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash 937221901, now seen corresponding path program 164 times [2021-07-13 20:13:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:44,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389255235] [2021-07-13 20:13:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:44,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:44,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389255235] [2021-07-13 20:13:44,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389255235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:44,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018265974] [2021-07-13 20:13:44,885 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:44,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:44,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:45,158 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:45,159 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 15 [2021-07-13 20:13:45,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:45,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:45,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:45,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-07-13 20:13:45,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:45,299 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 29 treesize of output 13 [2021-07-13 20:13:45,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:45,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:45,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:45,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018265974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:45,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:45,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:13:45,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616056860] [2021-07-13 20:13:45,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:45,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:45,451 INFO L87 Difference]: Start difference. First operand 22303 states and 67187 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:48,173 INFO L93 Difference]: Finished difference Result 26099 states and 77539 transitions. [2021-07-13 20:13:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:13:48,173 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:48,228 INFO L225 Difference]: With dead ends: 26099 [2021-07-13 20:13:48,228 INFO L226 Difference]: Without dead ends: 25738 [2021-07-13 20:13:48,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1760.5ms TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:13:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25738 states. [2021-07-13 20:13:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25738 to 22243. [2021-07-13 20:13:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22243 states, 22242 states have (on average 3.0142073554536464) internal successors, (67042), 22242 states have internal predecessors, (67042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22243 states to 22243 states and 67042 transitions. [2021-07-13 20:13:48,645 INFO L78 Accepts]: Start accepts. Automaton has 22243 states and 67042 transitions. Word has length 54 [2021-07-13 20:13:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:48,645 INFO L482 AbstractCegarLoop]: Abstraction has 22243 states and 67042 transitions. [2021-07-13 20:13:48,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22243 states and 67042 transitions. [2021-07-13 20:13:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:48,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:48,674 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:48,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-13 20:13:48,875 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1865902189, now seen corresponding path program 165 times [2021-07-13 20:13:48,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:48,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193133961] [2021-07-13 20:13:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:49,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193133961] [2021-07-13 20:13:49,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193133961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927883918] [2021-07-13 20:13:49,341 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:49,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:13:49,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:13:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:49,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:49,690 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 17 [2021-07-13 20:13:49,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:49,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-13 20:13:49,766 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:49,767 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 29 treesize of output 13 [2021-07-13 20:13:49,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:49,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:49,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927883918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:49,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:49,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:13:49,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511998377] [2021-07-13 20:13:49,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:13:49,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:13:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:13:49,918 INFO L87 Difference]: Start difference. First operand 22243 states and 67042 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:52,605 INFO L93 Difference]: Finished difference Result 25983 states and 77256 transitions. [2021-07-13 20:13:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:13:52,606 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:52,657 INFO L225 Difference]: With dead ends: 25983 [2021-07-13 20:13:52,657 INFO L226 Difference]: Without dead ends: 25597 [2021-07-13 20:13:52,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1871.2ms TimeCoverageRelationStatistics Valid=300, Invalid=3860, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:13:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25597 states. [2021-07-13 20:13:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25597 to 22263. [2021-07-13 20:13:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22263 states, 22262 states have (on average 3.013475878178061) internal successors, (67086), 22262 states have internal predecessors, (67086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22263 states to 22263 states and 67086 transitions. [2021-07-13 20:13:53,028 INFO L78 Accepts]: Start accepts. Automaton has 22263 states and 67086 transitions. Word has length 54 [2021-07-13 20:13:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:53,029 INFO L482 AbstractCegarLoop]: Abstraction has 22263 states and 67086 transitions. [2021-07-13 20:13:53,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22263 states and 67086 transitions. [2021-07-13 20:13:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:53,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:53,058 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:53,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:53,258 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:53,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:53,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1392741197, now seen corresponding path program 166 times [2021-07-13 20:13:53,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:53,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908638335] [2021-07-13 20:13:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:53,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:53,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908638335] [2021-07-13 20:13:53,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908638335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:53,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769844169] [2021-07-13 20:13:53,657 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:53,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:53,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:53,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:53,968 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:53,968 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 37 treesize of output 17 [2021-07-13 20:13:53,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:53,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:53,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:53,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-07-13 20:13:54,080 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:54,080 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 29 treesize of output 13 [2021-07-13 20:13:54,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:54,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:54,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:54,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:54,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769844169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:54,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:54,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:13:54,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535564145] [2021-07-13 20:13:54,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:54,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:54,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:54,252 INFO L87 Difference]: Start difference. First operand 22263 states and 67086 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:56,741 INFO L93 Difference]: Finished difference Result 26191 states and 77804 transitions. [2021-07-13 20:13:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:13:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:56,797 INFO L225 Difference]: With dead ends: 26191 [2021-07-13 20:13:56,797 INFO L226 Difference]: Without dead ends: 25853 [2021-07-13 20:13:56,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1683.3ms TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:13:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25853 states. [2021-07-13 20:13:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25853 to 22247. [2021-07-13 20:13:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22247 states, 22246 states have (on average 3.014384608468938) internal successors, (67058), 22246 states have internal predecessors, (67058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22247 states to 22247 states and 67058 transitions. [2021-07-13 20:13:57,179 INFO L78 Accepts]: Start accepts. Automaton has 22247 states and 67058 transitions. Word has length 54 [2021-07-13 20:13:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:57,179 INFO L482 AbstractCegarLoop]: Abstraction has 22247 states and 67058 transitions. [2021-07-13 20:13:57,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:57,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22247 states and 67058 transitions. [2021-07-13 20:13:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:57,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:57,210 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:57,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-13 20:13:57,410 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:57,411 INFO L82 PathProgramCache]: Analyzing trace with hash 489626325, now seen corresponding path program 167 times [2021-07-13 20:13:57,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:57,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164378552] [2021-07-13 20:13:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:57,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:57,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164378552] [2021-07-13 20:13:57,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164378552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:57,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096965789] [2021-07-13 20:13:57,798 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:57,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:13:57,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:13:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:58,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:13:58,105 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 17 [2021-07-13 20:13:58,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:58,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:58,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:58,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:13:58,218 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:13:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:13:58,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:58,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:58,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:58,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:13:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:58,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096965789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:58,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:58,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:13:58,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774246429] [2021-07-13 20:13:58,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:58,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:58,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:58,407 INFO L87 Difference]: Start difference. First operand 22247 states and 67058 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:01,203 INFO L93 Difference]: Finished difference Result 26274 states and 78020 transitions. [2021-07-13 20:14:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:14:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:01,260 INFO L225 Difference]: With dead ends: 26274 [2021-07-13 20:14:01,260 INFO L226 Difference]: Without dead ends: 25893 [2021-07-13 20:14:01,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1753.1ms TimeCoverageRelationStatistics Valid=291, Invalid=3869, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:14:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25893 states. [2021-07-13 20:14:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25893 to 22247. [2021-07-13 20:14:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22247 states, 22246 states have (on average 3.0142048008630766) internal successors, (67054), 22246 states have internal predecessors, (67054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22247 states to 22247 states and 67054 transitions. [2021-07-13 20:14:01,640 INFO L78 Accepts]: Start accepts. Automaton has 22247 states and 67054 transitions. Word has length 54 [2021-07-13 20:14:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:01,640 INFO L482 AbstractCegarLoop]: Abstraction has 22247 states and 67054 transitions. [2021-07-13 20:14:01,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 22247 states and 67054 transitions. [2021-07-13 20:14:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:01,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:01,668 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:01,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:01,869 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash -619299063, now seen corresponding path program 168 times [2021-07-13 20:14:01,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:01,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075677854] [2021-07-13 20:14:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:02,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:02,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075677854] [2021-07-13 20:14:02,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075677854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:02,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435277952] [2021-07-13 20:14:02,402 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:02,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:14:02,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:02,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:14:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:02,748 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:02,749 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 17 [2021-07-13 20:14:02,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:02,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:02,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:02,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:14:02,826 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:02,826 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 27 treesize of output 13 [2021-07-13 20:14:02,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:02,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:02,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:02,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:14:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:02,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435277952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:02,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:02,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:14:02,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785666732] [2021-07-13 20:14:02,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:14:02,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:14:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:14:02,978 INFO L87 Difference]: Start difference. First operand 22247 states and 67054 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:05,830 INFO L93 Difference]: Finished difference Result 26848 states and 79836 transitions. [2021-07-13 20:14:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:14:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:05,889 INFO L225 Difference]: With dead ends: 26848 [2021-07-13 20:14:05,890 INFO L226 Difference]: Without dead ends: 26462 [2021-07-13 20:14:05,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1910.1ms TimeCoverageRelationStatistics Valid=306, Invalid=3984, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:14:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26462 states. [2021-07-13 20:14:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26462 to 22259. [2021-07-13 20:14:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22259 states, 22258 states have (on average 3.0140174319345854) internal successors, (67086), 22258 states have internal predecessors, (67086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22259 states to 22259 states and 67086 transitions. [2021-07-13 20:14:06,298 INFO L78 Accepts]: Start accepts. Automaton has 22259 states and 67086 transitions. Word has length 54 [2021-07-13 20:14:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:06,298 INFO L482 AbstractCegarLoop]: Abstraction has 22259 states and 67086 transitions. [2021-07-13 20:14:06,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 22259 states and 67086 transitions. [2021-07-13 20:14:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:06,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:06,330 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:06,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:06,531 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:06,531 INFO L82 PathProgramCache]: Analyzing trace with hash -719563301, now seen corresponding path program 169 times [2021-07-13 20:14:06,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:06,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647565650] [2021-07-13 20:14:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:06,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647565650] [2021-07-13 20:14:06,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647565650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:06,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824666943] [2021-07-13 20:14:06,968 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:07,277 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:07,277 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 17 [2021-07-13 20:14:07,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:07,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:07,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:07,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:14:07,389 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:07,389 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 25 treesize of output 13 [2021-07-13 20:14:07,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:07,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:07,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:07,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:14:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:07,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824666943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:07,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:07,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:14:07,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98939576] [2021-07-13 20:14:07,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:14:07,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:14:07,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:14:07,541 INFO L87 Difference]: Start difference. First operand 22259 states and 67086 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:11,166 INFO L93 Difference]: Finished difference Result 27526 states and 81597 transitions. [2021-07-13 20:14:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:14:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:11,233 INFO L225 Difference]: With dead ends: 27526 [2021-07-13 20:14:11,233 INFO L226 Difference]: Without dead ends: 26984 [2021-07-13 20:14:11,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2317.8ms TimeCoverageRelationStatistics Valid=447, Invalid=6195, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:14:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26984 states. [2021-07-13 20:14:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26984 to 22326. [2021-07-13 20:14:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22326 states, 22325 states have (on average 3.0133930571108625) internal successors, (67274), 22325 states have internal predecessors, (67274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22326 states to 22326 states and 67274 transitions. [2021-07-13 20:14:11,656 INFO L78 Accepts]: Start accepts. Automaton has 22326 states and 67274 transitions. Word has length 54 [2021-07-13 20:14:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:11,656 INFO L482 AbstractCegarLoop]: Abstraction has 22326 states and 67274 transitions. [2021-07-13 20:14:11,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 22326 states and 67274 transitions. [2021-07-13 20:14:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:11,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:11,687 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:11,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:11,888 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1748683119, now seen corresponding path program 170 times [2021-07-13 20:14:11,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:11,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008585412] [2021-07-13 20:14:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:12,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:12,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008585412] [2021-07-13 20:14:12,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008585412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883505902] [2021-07-13 20:14:12,320 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:12,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:12,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:12,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:12,635 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:14:12,636 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 37 treesize of output 17 [2021-07-13 20:14:12,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:12,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:12,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:12,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-07-13 20:14:12,742 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:12,743 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 27 treesize of output 13 [2021-07-13 20:14:12,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:12,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:12,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:12,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:14:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883505902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:14:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811282247] [2021-07-13 20:14:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:14:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:14:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:14:12,927 INFO L87 Difference]: Start difference. First operand 22326 states and 67274 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:17,220 INFO L93 Difference]: Finished difference Result 28082 states and 83134 transitions. [2021-07-13 20:14:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:14:17,220 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:17,282 INFO L225 Difference]: With dead ends: 28082 [2021-07-13 20:14:17,282 INFO L226 Difference]: Without dead ends: 27548 [2021-07-13 20:14:17,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 2649.9ms TimeCoverageRelationStatistics Valid=512, Invalid=7320, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:14:17,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27548 states. [2021-07-13 20:14:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27548 to 22380. [2021-07-13 20:14:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22380 states, 22379 states have (on average 3.0138075874703962) internal successors, (67446), 22379 states have internal predecessors, (67446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22380 states to 22380 states and 67446 transitions. [2021-07-13 20:14:17,680 INFO L78 Accepts]: Start accepts. Automaton has 22380 states and 67446 transitions. Word has length 54 [2021-07-13 20:14:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:17,680 INFO L482 AbstractCegarLoop]: Abstraction has 22380 states and 67446 transitions. [2021-07-13 20:14:17,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 22380 states and 67446 transitions. [2021-07-13 20:14:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:17,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:17,711 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:17,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 20:14:17,911 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1839703213, now seen corresponding path program 171 times [2021-07-13 20:14:17,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:17,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623426570] [2021-07-13 20:14:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:18,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:18,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623426570] [2021-07-13 20:14:18,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623426570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:18,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071984969] [2021-07-13 20:14:18,413 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:18,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:14:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:18,752 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:14:18,752 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 37 treesize of output 17 [2021-07-13 20:14:18,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:18,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-07-13 20:14:18,826 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:14:18,826 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 13 [2021-07-13 20:14:18,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:18,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:14:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:19,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071984969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:19,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:19,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:14:19,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939431198] [2021-07-13 20:14:19,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:14:19,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:19,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:14:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:14:19,010 INFO L87 Difference]: Start difference. First operand 22380 states and 67446 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:22,969 INFO L93 Difference]: Finished difference Result 29008 states and 85989 transitions. [2021-07-13 20:14:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:14:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:23,030 INFO L225 Difference]: With dead ends: 29008 [2021-07-13 20:14:23,030 INFO L226 Difference]: Without dead ends: 28705 [2021-07-13 20:14:23,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2659.9ms TimeCoverageRelationStatistics Valid=532, Invalid=7124, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:14:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28705 states. [2021-07-13 20:14:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28705 to 22358. [2021-07-13 20:14:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22358 states, 22357 states have (on average 3.013194972491837) internal successors, (67366), 22357 states have internal predecessors, (67366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22358 states to 22358 states and 67366 transitions. [2021-07-13 20:14:23,436 INFO L78 Accepts]: Start accepts. Automaton has 22358 states and 67366 transitions. Word has length 54 [2021-07-13 20:14:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:23,436 INFO L482 AbstractCegarLoop]: Abstraction has 22358 states and 67366 transitions. [2021-07-13 20:14:23,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 22358 states and 67366 transitions. [2021-07-13 20:14:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:23,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:23,465 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:23,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-13 20:14:23,666 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:23,666 INFO L82 PathProgramCache]: Analyzing trace with hash -861163887, now seen corresponding path program 172 times [2021-07-13 20:14:23,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:23,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988310634] [2021-07-13 20:14:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:24,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:24,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988310634] [2021-07-13 20:14:24,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988310634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:24,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959818982] [2021-07-13 20:14:24,095 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:24,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:24,402 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:24,402 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 17 [2021-07-13 20:14:24,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:24,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:14:24,479 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:24,479 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 25 treesize of output 13 [2021-07-13 20:14:24,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:24,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:14:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:24,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959818982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:24,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:24,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:14:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865280582] [2021-07-13 20:14:24,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:14:24,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:24,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:14:24,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:14:24,660 INFO L87 Difference]: Start difference. First operand 22358 states and 67366 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:29,149 INFO L93 Difference]: Finished difference Result 29727 states and 87861 transitions. [2021-07-13 20:14:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:14:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:29,209 INFO L225 Difference]: With dead ends: 29727 [2021-07-13 20:14:29,209 INFO L226 Difference]: Without dead ends: 29341 [2021-07-13 20:14:29,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2859.7ms TimeCoverageRelationStatistics Valid=623, Invalid=8689, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:14:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29341 states. [2021-07-13 20:14:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29341 to 22401. [2021-07-13 20:14:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22401 states, 22400 states have (on average 3.012455357142857) internal successors, (67479), 22400 states have internal predecessors, (67479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22401 states to 22401 states and 67479 transitions. [2021-07-13 20:14:29,605 INFO L78 Accepts]: Start accepts. Automaton has 22401 states and 67479 transitions. Word has length 54 [2021-07-13 20:14:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:29,605 INFO L482 AbstractCegarLoop]: Abstraction has 22401 states and 67479 transitions. [2021-07-13 20:14:29,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 22401 states and 67479 transitions. [2021-07-13 20:14:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:29,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:29,635 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:29,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 20:14:29,836 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash 960790843, now seen corresponding path program 173 times [2021-07-13 20:14:29,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:29,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126760230] [2021-07-13 20:14:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:30,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:30,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126760230] [2021-07-13 20:14:30,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126760230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:30,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081844957] [2021-07-13 20:14:30,225 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:30,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:14:30,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:14:30,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:30,496 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:30,496 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 17 [2021-07-13 20:14:30,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:30,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:30,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:30,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:14:30,642 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:14:30,642 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 13 [2021-07-13 20:14:30,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:30,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:30,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:30,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:14:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081844957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:30,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:30,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:14:30,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130881308] [2021-07-13 20:14:30,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:30,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:30,789 INFO L87 Difference]: Start difference. First operand 22401 states and 67479 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:33,277 INFO L93 Difference]: Finished difference Result 26306 states and 78127 transitions. [2021-07-13 20:14:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:14:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:33,338 INFO L225 Difference]: With dead ends: 26306 [2021-07-13 20:14:33,338 INFO L226 Difference]: Without dead ends: 25968 [2021-07-13 20:14:33,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1692.0ms TimeCoverageRelationStatistics Valid=304, Invalid=3856, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:14:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25968 states. [2021-07-13 20:14:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25968 to 22402. [2021-07-13 20:14:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22402 states, 22401 states have (on average 3.012499441989197) internal successors, (67483), 22401 states have internal predecessors, (67483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22402 states to 22402 states and 67483 transitions. [2021-07-13 20:14:33,748 INFO L78 Accepts]: Start accepts. Automaton has 22402 states and 67483 transitions. Word has length 54 [2021-07-13 20:14:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:33,748 INFO L482 AbstractCegarLoop]: Abstraction has 22402 states and 67483 transitions. [2021-07-13 20:14:33,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22402 states and 67483 transitions. [2021-07-13 20:14:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:33,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:33,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:34,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 20:14:34,128 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:34,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:34,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1265966413, now seen corresponding path program 174 times [2021-07-13 20:14:34,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:34,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340306265] [2021-07-13 20:14:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:34,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:34,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340306265] [2021-07-13 20:14:34,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340306265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:34,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170799734] [2021-07-13 20:14:34,572 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:34,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:14:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:34,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:34,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:34,883 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 31 treesize of output 17 [2021-07-13 20:14:34,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:34,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:34,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:34,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:30 [2021-07-13 20:14:35,032 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:35,032 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 25 treesize of output 13 [2021-07-13 20:14:35,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:35,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:35,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:35,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:14:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:35,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170799734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:35,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:35,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2021-07-13 20:14:35,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341138392] [2021-07-13 20:14:35,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:14:35,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:14:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:14:35,182 INFO L87 Difference]: Start difference. First operand 22402 states and 67483 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:39,035 INFO L93 Difference]: Finished difference Result 25605 states and 76236 transitions. [2021-07-13 20:14:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:14:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:39,088 INFO L225 Difference]: With dead ends: 25605 [2021-07-13 20:14:39,089 INFO L226 Difference]: Without dead ends: 25224 [2021-07-13 20:14:39,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2744.9ms TimeCoverageRelationStatistics Valid=570, Invalid=7440, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:14:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25224 states. [2021-07-13 20:14:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25224 to 22508. [2021-07-13 20:14:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22508 states, 22507 states have (on average 3.0103967654507486) internal successors, (67755), 22507 states have internal predecessors, (67755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22508 states to 22508 states and 67755 transitions. [2021-07-13 20:14:39,471 INFO L78 Accepts]: Start accepts. Automaton has 22508 states and 67755 transitions. Word has length 54 [2021-07-13 20:14:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:39,471 INFO L482 AbstractCegarLoop]: Abstraction has 22508 states and 67755 transitions. [2021-07-13 20:14:39,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 22508 states and 67755 transitions. [2021-07-13 20:14:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:39,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:39,502 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:39,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 20:14:39,702 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2104427991, now seen corresponding path program 175 times [2021-07-13 20:14:39,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:39,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474363401] [2021-07-13 20:14:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:40,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:40,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474363401] [2021-07-13 20:14:40,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474363401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:40,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382295314] [2021-07-13 20:14:40,093 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:40,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:40,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:40,380 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:40,380 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 17 [2021-07-13 20:14:40,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:40,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:40,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:40,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:14:40,542 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:40,543 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 29 treesize of output 13 [2021-07-13 20:14:40,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:40,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:40,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:40,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:14:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382295314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:40,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:14:40,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555391912] [2021-07-13 20:14:40,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:40,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:40,699 INFO L87 Difference]: Start difference. First operand 22508 states and 67755 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:43,774 INFO L93 Difference]: Finished difference Result 26981 states and 79820 transitions. [2021-07-13 20:14:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:14:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:43,832 INFO L225 Difference]: With dead ends: 26981 [2021-07-13 20:14:43,832 INFO L226 Difference]: Without dead ends: 26470 [2021-07-13 20:14:43,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1970.2ms TimeCoverageRelationStatistics Valid=360, Invalid=4896, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:14:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26470 states. [2021-07-13 20:14:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26470 to 22459. [2021-07-13 20:14:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22459 states, 22458 states have (on average 3.0121560245792147) internal successors, (67647), 22458 states have internal predecessors, (67647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 67647 transitions. [2021-07-13 20:14:44,239 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 67647 transitions. Word has length 54 [2021-07-13 20:14:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:44,239 INFO L482 AbstractCegarLoop]: Abstraction has 22459 states and 67647 transitions. [2021-07-13 20:14:44,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 67647 transitions. [2021-07-13 20:14:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:44,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:44,270 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:44,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:44,471 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1804926473, now seen corresponding path program 176 times [2021-07-13 20:14:44,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:44,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999452908] [2021-07-13 20:14:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:44,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:44,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999452908] [2021-07-13 20:14:44,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999452908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:44,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946465485] [2021-07-13 20:14:44,873 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:44,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:44,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:45,141 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:14:45,141 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 37 treesize of output 17 [2021-07-13 20:14:45,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:45,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:45,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:45,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-07-13 20:14:45,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:45,281 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 25 treesize of output 13 [2021-07-13 20:14:45,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:45,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:45,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:45,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:14:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:45,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946465485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:45,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:45,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:14:45,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880909735] [2021-07-13 20:14:45,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:45,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:45,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:45,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:45,433 INFO L87 Difference]: Start difference. First operand 22459 states and 67647 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:48,860 INFO L93 Difference]: Finished difference Result 27296 states and 80725 transitions. [2021-07-13 20:14:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:14:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:48,919 INFO L225 Difference]: With dead ends: 27296 [2021-07-13 20:14:48,919 INFO L226 Difference]: Without dead ends: 26849 [2021-07-13 20:14:48,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 2304.9ms TimeCoverageRelationStatistics Valid=435, Invalid=6045, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:14:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26849 states. [2021-07-13 20:14:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26849 to 22439. [2021-07-13 20:14:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22439 states, 22438 states have (on average 3.01319190658704) internal successors, (67610), 22438 states have internal predecessors, (67610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22439 states to 22439 states and 67610 transitions. [2021-07-13 20:14:49,332 INFO L78 Accepts]: Start accepts. Automaton has 22439 states and 67610 transitions. Word has length 54 [2021-07-13 20:14:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:49,332 INFO L482 AbstractCegarLoop]: Abstraction has 22439 states and 67610 transitions. [2021-07-13 20:14:49,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 22439 states and 67610 transitions. [2021-07-13 20:14:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:49,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:49,364 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:49,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-07-13 20:14:49,565 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1783459859, now seen corresponding path program 177 times [2021-07-13 20:14:49,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:49,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411232491] [2021-07-13 20:14:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:49,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411232491] [2021-07-13 20:14:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411232491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318366090] [2021-07-13 20:14:49,956 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:49,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:14:49,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:49,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:14:49,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:50,233 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:50,233 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 17 [2021-07-13 20:14:50,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:50,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:50,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:50,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:14:50,345 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:50,345 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 29 treesize of output 13 [2021-07-13 20:14:50,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:50,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:50,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:50,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:14:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318366090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:50,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:50,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:14:50,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799700351] [2021-07-13 20:14:50,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:14:50,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:50,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:14:50,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:14:50,590 INFO L87 Difference]: Start difference. First operand 22439 states and 67610 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:54,528 INFO L93 Difference]: Finished difference Result 29625 states and 87623 transitions. [2021-07-13 20:14:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:14:54,528 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:54,590 INFO L225 Difference]: With dead ends: 29625 [2021-07-13 20:14:54,591 INFO L226 Difference]: Without dead ends: 29322 [2021-07-13 20:14:54,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2409.2ms TimeCoverageRelationStatistics Valid=466, Invalid=6340, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:14:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29322 states. [2021-07-13 20:14:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29322 to 22437. [2021-07-13 20:14:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22437 states, 22436 states have (on average 3.013282224995543) internal successors, (67606), 22436 states have internal predecessors, (67606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22437 states to 22437 states and 67606 transitions. [2021-07-13 20:14:55,027 INFO L78 Accepts]: Start accepts. Automaton has 22437 states and 67606 transitions. Word has length 54 [2021-07-13 20:14:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:55,027 INFO L482 AbstractCegarLoop]: Abstraction has 22437 states and 67606 transitions. [2021-07-13 20:14:55,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 22437 states and 67606 transitions. [2021-07-13 20:14:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:55,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:55,057 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:55,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:55,259 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:55,260 INFO L82 PathProgramCache]: Analyzing trace with hash -917407241, now seen corresponding path program 178 times [2021-07-13 20:14:55,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:55,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217939784] [2021-07-13 20:14:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:55,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:55,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217939784] [2021-07-13 20:14:55,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217939784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:55,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218853704] [2021-07-13 20:14:55,653 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:55,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:55,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:55,923 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:55,924 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 17 [2021-07-13 20:14:55,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:55,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:55,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:55,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:14:56,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:14:56,034 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 27 treesize of output 13 [2021-07-13 20:14:56,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:56,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:56,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:56,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:14:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:14:56,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218853704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:56,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:56,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:14:56,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623095586] [2021-07-13 20:14:56,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:56,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:56,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:56,214 INFO L87 Difference]: Start difference. First operand 22437 states and 67606 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:00,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:00,153 INFO L93 Difference]: Finished difference Result 30322 states and 89480 transitions. [2021-07-13 20:15:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:15:00,154 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:00,215 INFO L225 Difference]: With dead ends: 30322 [2021-07-13 20:15:00,216 INFO L226 Difference]: Without dead ends: 29984 [2021-07-13 20:15:00,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2476.1ms TimeCoverageRelationStatistics Valid=504, Invalid=6978, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:15:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29984 states. [2021-07-13 20:15:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29984 to 22418. [2021-07-13 20:15:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22418 states, 22417 states have (on average 3.013516527635277) internal successors, (67554), 22417 states have internal predecessors, (67554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22418 states to 22418 states and 67554 transitions. [2021-07-13 20:15:00,622 INFO L78 Accepts]: Start accepts. Automaton has 22418 states and 67554 transitions. Word has length 54 [2021-07-13 20:15:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:00,622 INFO L482 AbstractCegarLoop]: Abstraction has 22418 states and 67554 transitions. [2021-07-13 20:15:00,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 22418 states and 67554 transitions. [2021-07-13 20:15:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:00,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:00,652 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:00,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-13 20:15:00,853 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash -159582847, now seen corresponding path program 179 times [2021-07-13 20:15:00,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:00,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890822028] [2021-07-13 20:15:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:01,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:01,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890822028] [2021-07-13 20:15:01,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890822028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:01,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711282316] [2021-07-13 20:15:01,217 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:01,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:15:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:15:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:01,503 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17 [2021-07-13 20:15:01,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:01,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:01,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:01,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:15:01,656 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:01,656 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 25 treesize of output 13 [2021-07-13 20:15:01,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:01,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:01,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:01,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:15:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:01,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711282316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:01,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:01,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:15:01,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800055845] [2021-07-13 20:15:01,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:01,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:01,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:01,807 INFO L87 Difference]: Start difference. First operand 22418 states and 67554 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:04,569 INFO L93 Difference]: Finished difference Result 26491 states and 78659 transitions. [2021-07-13 20:15:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:15:04,570 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:04,623 INFO L225 Difference]: With dead ends: 26491 [2021-07-13 20:15:04,624 INFO L226 Difference]: Without dead ends: 26130 [2021-07-13 20:15:04,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1850.4ms TimeCoverageRelationStatistics Valid=316, Invalid=4240, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:15:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26130 states. [2021-07-13 20:15:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26130 to 22427. [2021-07-13 20:15:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22427 states, 22426 states have (on average 3.013466512084188) internal successors, (67580), 22426 states have internal predecessors, (67580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22427 states to 22427 states and 67580 transitions. [2021-07-13 20:15:05,031 INFO L78 Accepts]: Start accepts. Automaton has 22427 states and 67580 transitions. Word has length 54 [2021-07-13 20:15:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:05,031 INFO L482 AbstractCegarLoop]: Abstraction has 22427 states and 67580 transitions. [2021-07-13 20:15:05,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 22427 states and 67580 transitions. [2021-07-13 20:15:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:05,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:05,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:05,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:05,260 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:05,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1092522651, now seen corresponding path program 180 times [2021-07-13 20:15:05,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:05,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458219225] [2021-07-13 20:15:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:05,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:05,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458219225] [2021-07-13 20:15:05,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458219225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:05,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641177561] [2021-07-13 20:15:05,633 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:05,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:15:05,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:05,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:15:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:05,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:05,918 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 17 [2021-07-13 20:15:05,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:05,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:05,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:05,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:15:06,064 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:15:06,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:06,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:06,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:06,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:15:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:06,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641177561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:06,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:06,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:15:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889286836] [2021-07-13 20:15:06,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:06,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:06,225 INFO L87 Difference]: Start difference. First operand 22427 states and 67580 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:09,717 INFO L93 Difference]: Finished difference Result 26728 states and 79328 transitions. [2021-07-13 20:15:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:15:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:09,775 INFO L225 Difference]: With dead ends: 26728 [2021-07-13 20:15:09,775 INFO L226 Difference]: Without dead ends: 26402 [2021-07-13 20:15:09,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 2160.0ms TimeCoverageRelationStatistics Valid=375, Invalid=5175, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:15:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26402 states. [2021-07-13 20:15:10,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26402 to 22439. [2021-07-13 20:15:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22439 states, 22438 states have (on average 3.01332560834299) internal successors, (67613), 22438 states have internal predecessors, (67613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22439 states to 22439 states and 67613 transitions. [2021-07-13 20:15:10,192 INFO L78 Accepts]: Start accepts. Automaton has 22439 states and 67613 transitions. Word has length 54 [2021-07-13 20:15:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:10,192 INFO L482 AbstractCegarLoop]: Abstraction has 22439 states and 67613 transitions. [2021-07-13 20:15:10,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 22439 states and 67613 transitions. [2021-07-13 20:15:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:10,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:10,224 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:10,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-13 20:15:10,437 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:10,437 INFO L82 PathProgramCache]: Analyzing trace with hash 227933083, now seen corresponding path program 181 times [2021-07-13 20:15:10,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:10,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136032660] [2021-07-13 20:15:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:10,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136032660] [2021-07-13 20:15:10,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136032660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335580] [2021-07-13 20:15:10,828 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:15:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:11,094 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:11,094 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 17 [2021-07-13 20:15:11,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:11,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:15:11,205 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:15:11,205 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 29 treesize of output 13 [2021-07-13 20:15:11,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:11,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:15:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:11,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:11,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:15:11,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100670222] [2021-07-13 20:15:11,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:11,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:11,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:11,387 INFO L87 Difference]: Start difference. First operand 22439 states and 67613 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:14,558 INFO L93 Difference]: Finished difference Result 29166 states and 86513 transitions. [2021-07-13 20:15:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:15:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:14,626 INFO L225 Difference]: With dead ends: 29166 [2021-07-13 20:15:14,627 INFO L226 Difference]: Without dead ends: 28945 [2021-07-13 20:15:14,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1970.1ms TimeCoverageRelationStatistics Valid=354, Invalid=4758, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:15:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28945 states. [2021-07-13 20:15:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28945 to 22443. [2021-07-13 20:15:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22443 states, 22442 states have (on average 3.013278673914981) internal successors, (67624), 22442 states have internal predecessors, (67624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22443 states to 22443 states and 67624 transitions. [2021-07-13 20:15:15,036 INFO L78 Accepts]: Start accepts. Automaton has 22443 states and 67624 transitions. Word has length 54 [2021-07-13 20:15:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:15,036 INFO L482 AbstractCegarLoop]: Abstraction has 22443 states and 67624 transitions. [2021-07-13 20:15:15,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 22443 states and 67624 transitions. [2021-07-13 20:15:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:15,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:15,065 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:15,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:15,266 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1822033279, now seen corresponding path program 182 times [2021-07-13 20:15:15,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:15,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069322081] [2021-07-13 20:15:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:15,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:15,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069322081] [2021-07-13 20:15:15,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069322081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:15,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134329882] [2021-07-13 20:15:15,636 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:15,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:15,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:15,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:15:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:15,934 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:15:15,934 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 37 treesize of output 17 [2021-07-13 20:15:15,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:15,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:15,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:15,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-07-13 20:15:16,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:16,083 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 27 treesize of output 13 [2021-07-13 20:15:16,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:16,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:16,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:16,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:15:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:16,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134329882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:16,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:16,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:15:16,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553122618] [2021-07-13 20:15:16,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:16,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:16,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:16,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:16,266 INFO L87 Difference]: Start difference. First operand 22443 states and 67624 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:19,835 INFO L93 Difference]: Finished difference Result 29734 states and 88061 transitions. [2021-07-13 20:15:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:15:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:19,896 INFO L225 Difference]: With dead ends: 29734 [2021-07-13 20:15:19,897 INFO L226 Difference]: Without dead ends: 29548 [2021-07-13 20:15:19,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2187.5ms TimeCoverageRelationStatistics Valid=377, Invalid=5323, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:15:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29548 states. [2021-07-13 20:15:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29548 to 22427. [2021-07-13 20:15:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22427 states, 22426 states have (on average 3.013466512084188) internal successors, (67580), 22426 states have internal predecessors, (67580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22427 states to 22427 states and 67580 transitions. [2021-07-13 20:15:20,328 INFO L78 Accepts]: Start accepts. Automaton has 22427 states and 67580 transitions. Word has length 54 [2021-07-13 20:15:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:20,328 INFO L482 AbstractCegarLoop]: Abstraction has 22427 states and 67580 transitions. [2021-07-13 20:15:20,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 22427 states and 67580 transitions. [2021-07-13 20:15:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:20,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:20,359 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:20,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:20,560 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:20,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2056709489, now seen corresponding path program 183 times [2021-07-13 20:15:20,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:20,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867267263] [2021-07-13 20:15:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:20,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:20,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867267263] [2021-07-13 20:15:20,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867267263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:20,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797532965] [2021-07-13 20:15:20,929 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:20,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:15:20,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:15:20,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:21,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:21,241 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 27 treesize of output 27 [2021-07-13 20:15:21,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:21,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:21,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:21,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:37 [2021-07-13 20:15:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:21,627 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 20 treesize of output 10 [2021-07-13 20:15:21,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:21,631 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:21,631 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 25 treesize of output 13 [2021-07-13 20:15:21,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:21,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:21,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:15:21,646 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:68, output treesize:34 [2021-07-13 20:15:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:21,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797532965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:21,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:21,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 41 [2021-07-13 20:15:21,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218728039] [2021-07-13 20:15:21,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:15:21,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:15:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:15:21,875 INFO L87 Difference]: Start difference. First operand 22427 states and 67580 transitions. Second operand has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:26,558 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 20:15:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:28,640 INFO L93 Difference]: Finished difference Result 26382 states and 78155 transitions. [2021-07-13 20:15:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:15:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:28,696 INFO L225 Difference]: With dead ends: 26382 [2021-07-13 20:15:28,696 INFO L226 Difference]: Without dead ends: 25913 [2021-07-13 20:15:28,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 4720.8ms TimeCoverageRelationStatistics Valid=856, Invalid=13424, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:15:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25913 states. [2021-07-13 20:15:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25913 to 22610. [2021-07-13 20:15:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22610 states, 22609 states have (on average 3.0103498606749524) internal successors, (68061), 22609 states have internal predecessors, (68061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22610 states to 22610 states and 68061 transitions. [2021-07-13 20:15:29,095 INFO L78 Accepts]: Start accepts. Automaton has 22610 states and 68061 transitions. Word has length 54 [2021-07-13 20:15:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:29,095 INFO L482 AbstractCegarLoop]: Abstraction has 22610 states and 68061 transitions. [2021-07-13 20:15:29,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 22610 states and 68061 transitions. [2021-07-13 20:15:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:29,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:29,125 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:29,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-13 20:15:29,329 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1500382865, now seen corresponding path program 184 times [2021-07-13 20:15:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:29,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627460975] [2021-07-13 20:15:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:29,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:29,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627460975] [2021-07-13 20:15:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627460975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:29,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350438638] [2021-07-13 20:15:29,691 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:29,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:29,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:15:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:29,927 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:29,927 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 31 treesize of output 15 [2021-07-13 20:15:29,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:29,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-07-13 20:15:30,098 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:30,098 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 25 treesize of output 13 [2021-07-13 20:15:30,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:30,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:30,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:30,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:15:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350438638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:30,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:30,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:15:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577339492] [2021-07-13 20:15:30,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:30,246 INFO L87 Difference]: Start difference. First operand 22610 states and 68061 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:32,582 INFO L93 Difference]: Finished difference Result 26610 states and 78954 transitions. [2021-07-13 20:15:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:15:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:32,645 INFO L225 Difference]: With dead ends: 26610 [2021-07-13 20:15:32,645 INFO L226 Difference]: Without dead ends: 26320 [2021-07-13 20:15:32,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1695.3ms TimeCoverageRelationStatistics Valid=331, Invalid=4091, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:15:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26320 states. [2021-07-13 20:15:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26320 to 22625. [2021-07-13 20:15:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22625 states, 22624 states have (on average 3.010342998585573) internal successors, (68106), 22624 states have internal predecessors, (68106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22625 states to 22625 states and 68106 transitions. [2021-07-13 20:15:33,053 INFO L78 Accepts]: Start accepts. Automaton has 22625 states and 68106 transitions. Word has length 54 [2021-07-13 20:15:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:33,054 INFO L482 AbstractCegarLoop]: Abstraction has 22625 states and 68106 transitions. [2021-07-13 20:15:33,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22625 states and 68106 transitions. [2021-07-13 20:15:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:33,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:33,084 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:33,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:33,289 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:33,289 INFO L82 PathProgramCache]: Analyzing trace with hash -170047767, now seen corresponding path program 185 times [2021-07-13 20:15:33,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:33,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647210988] [2021-07-13 20:15:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:33,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647210988] [2021-07-13 20:15:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647210988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690925065] [2021-07-13 20:15:33,651 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:33,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:15:33,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:33,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:15:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:34,098 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 25 treesize of output 17 [2021-07-13 20:15:34,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:34,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:25 [2021-07-13 20:15:34,327 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:15:34,328 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 29 treesize of output 13 [2021-07-13 20:15:34,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:34,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:34,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:15:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:34,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690925065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:34,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:34,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-07-13 20:15:34,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377310241] [2021-07-13 20:15:34,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:15:34,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:15:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:15:34,551 INFO L87 Difference]: Start difference. First operand 22625 states and 68106 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:40,548 INFO L93 Difference]: Finished difference Result 27499 states and 81589 transitions. [2021-07-13 20:15:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:15:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:40,614 INFO L225 Difference]: With dead ends: 27499 [2021-07-13 20:15:40,614 INFO L226 Difference]: Without dead ends: 27256 [2021-07-13 20:15:40,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 4196.9ms TimeCoverageRelationStatistics Valid=890, Invalid=13152, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:15:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27256 states. [2021-07-13 20:15:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27256 to 22840. [2021-07-13 20:15:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22840 states, 22839 states have (on average 3.008231533779938) internal successors, (68705), 22839 states have internal predecessors, (68705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22840 states to 22840 states and 68705 transitions. [2021-07-13 20:15:41,057 INFO L78 Accepts]: Start accepts. Automaton has 22840 states and 68705 transitions. Word has length 54 [2021-07-13 20:15:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:41,058 INFO L482 AbstractCegarLoop]: Abstraction has 22840 states and 68705 transitions. [2021-07-13 20:15:41,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 22840 states and 68705 transitions. [2021-07-13 20:15:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:41,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:41,090 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:41,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-07-13 20:15:41,290 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash -726374391, now seen corresponding path program 186 times [2021-07-13 20:15:41,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:41,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596240235] [2021-07-13 20:15:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:41,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596240235] [2021-07-13 20:15:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596240235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451032658] [2021-07-13 20:15:41,642 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:41,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:15:41,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:41,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:15:41,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:42,024 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 29 treesize of output 15 [2021-07-13 20:15:42,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:42,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:42,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:42,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-07-13 20:15:42,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:42,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:42,314 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 13 [2021-07-13 20:15:42,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:42,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:42,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:42,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:16 [2021-07-13 20:15:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:42,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451032658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:42,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:42,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2021-07-13 20:15:42,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998459879] [2021-07-13 20:15:42,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:15:42,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:42,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:15:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:15:42,618 INFO L87 Difference]: Start difference. First operand 22840 states and 68705 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:50,210 INFO L93 Difference]: Finished difference Result 27456 states and 81476 transitions. [2021-07-13 20:15:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-13 20:15:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:50,269 INFO L225 Difference]: With dead ends: 27456 [2021-07-13 20:15:50,270 INFO L226 Difference]: Without dead ends: 27266 [2021-07-13 20:15:50,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 5004.3ms TimeCoverageRelationStatistics Valid=1014, Invalid=15242, Unknown=0, NotChecked=0, Total=16256 [2021-07-13 20:15:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27266 states. [2021-07-13 20:15:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27266 to 22892. [2021-07-13 20:15:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22892 states, 22891 states have (on average 3.0068149054213444) internal successors, (68829), 22891 states have internal predecessors, (68829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22892 states to 22892 states and 68829 transitions. [2021-07-13 20:15:50,682 INFO L78 Accepts]: Start accepts. Automaton has 22892 states and 68829 transitions. Word has length 54 [2021-07-13 20:15:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:50,682 INFO L482 AbstractCegarLoop]: Abstraction has 22892 states and 68829 transitions. [2021-07-13 20:15:50,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22892 states and 68829 transitions. [2021-07-13 20:15:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:50,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:50,715 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:50,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-13 20:15:50,915 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:50,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1972134019, now seen corresponding path program 187 times [2021-07-13 20:15:50,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:50,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273397961] [2021-07-13 20:15:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:51,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:51,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273397961] [2021-07-13 20:15:51,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273397961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:51,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135468424] [2021-07-13 20:15:51,267 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:15:51,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:51,504 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:51,504 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 17 [2021-07-13 20:15:51,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:51,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:15:51,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:51,690 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 29 treesize of output 13 [2021-07-13 20:15:51,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:51,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:15:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:51,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135468424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:51,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:51,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:15:51,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234001269] [2021-07-13 20:15:51,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:51,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:51,833 INFO L87 Difference]: Start difference. First operand 22892 states and 68829 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:54,581 INFO L93 Difference]: Finished difference Result 26868 states and 79650 transitions. [2021-07-13 20:15:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:15:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:54,642 INFO L225 Difference]: With dead ends: 26868 [2021-07-13 20:15:54,642 INFO L226 Difference]: Without dead ends: 26567 [2021-07-13 20:15:54,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1690.8ms TimeCoverageRelationStatistics Valid=318, Invalid=3972, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:15:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26567 states. [2021-07-13 20:15:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26567 to 22892. [2021-07-13 20:15:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22892 states, 22891 states have (on average 3.006640164256695) internal successors, (68825), 22891 states have internal predecessors, (68825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22892 states to 22892 states and 68825 transitions. [2021-07-13 20:15:55,039 INFO L78 Accepts]: Start accepts. Automaton has 22892 states and 68825 transitions. Word has length 54 [2021-07-13 20:15:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:55,039 INFO L482 AbstractCegarLoop]: Abstraction has 22892 states and 68825 transitions. [2021-07-13 20:15:55,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22892 states and 68825 transitions. [2021-07-13 20:15:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:55,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:55,070 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:55,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:55,270 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1688272603, now seen corresponding path program 188 times [2021-07-13 20:15:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279701844] [2021-07-13 20:15:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:55,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:55,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279701844] [2021-07-13 20:15:55,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279701844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:55,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189485291] [2021-07-13 20:15:55,676 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:55,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:55,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:15:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:55,967 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:15:55,968 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 37 treesize of output 17 [2021-07-13 20:15:55,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:55,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:55,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:55,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-07-13 20:15:56,226 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:15:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:15:56,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:56,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:56,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:56,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:15:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:15:56,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189485291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:56,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:56,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:15:56,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075985967] [2021-07-13 20:15:56,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:15:56,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:56,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:15:56,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:15:56,382 INFO L87 Difference]: Start difference. First operand 22892 states and 68825 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:59,428 INFO L93 Difference]: Finished difference Result 26649 states and 79051 transitions. [2021-07-13 20:15:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:15:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:59,486 INFO L225 Difference]: With dead ends: 26649 [2021-07-13 20:15:59,487 INFO L226 Difference]: Without dead ends: 26288 [2021-07-13 20:15:59,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1976.6ms TimeCoverageRelationStatistics Valid=338, Invalid=4632, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:15:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26288 states. [2021-07-13 20:15:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26288 to 22880. [2021-07-13 20:15:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22880 states, 22879 states have (on average 3.0069496044407535) internal successors, (68796), 22879 states have internal predecessors, (68796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22880 states to 22880 states and 68796 transitions. [2021-07-13 20:15:59,917 INFO L78 Accepts]: Start accepts. Automaton has 22880 states and 68796 transitions. Word has length 54 [2021-07-13 20:15:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:59,917 INFO L482 AbstractCegarLoop]: Abstraction has 22880 states and 68796 transitions. [2021-07-13 20:15:59,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 22880 states and 68796 transitions. [2021-07-13 20:15:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:59,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:59,948 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:00,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:00,149 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -422516523, now seen corresponding path program 189 times [2021-07-13 20:16:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:00,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811981995] [2021-07-13 20:16:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:00,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:00,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811981995] [2021-07-13 20:16:00,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811981995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:00,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782827902] [2021-07-13 20:16:00,526 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:00,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:16:00,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:00,766 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:00,766 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 31 treesize of output 15 [2021-07-13 20:16:00,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:00,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-07-13 20:16:00,939 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:00,940 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 25 treesize of output 13 [2021-07-13 20:16:00,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:00,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:16:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:01,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782827902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:01,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:01,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:01,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095278975] [2021-07-13 20:16:01,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:01,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:01,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:01,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:01,088 INFO L87 Difference]: Start difference. First operand 22880 states and 68796 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:03,694 INFO L93 Difference]: Finished difference Result 26847 states and 79618 transitions. [2021-07-13 20:16:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:16:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:03,752 INFO L225 Difference]: With dead ends: 26847 [2021-07-13 20:16:03,752 INFO L226 Difference]: Without dead ends: 26509 [2021-07-13 20:16:03,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1827.0ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:16:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26509 states. [2021-07-13 20:16:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26509 to 22881. [2021-07-13 20:16:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22881 states, 22880 states have (on average 3.006993006993007) internal successors, (68800), 22880 states have internal predecessors, (68800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22881 states to 22881 states and 68800 transitions. [2021-07-13 20:16:04,143 INFO L78 Accepts]: Start accepts. Automaton has 22881 states and 68800 transitions. Word has length 54 [2021-07-13 20:16:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:04,143 INFO L482 AbstractCegarLoop]: Abstraction has 22881 states and 68800 transitions. [2021-07-13 20:16:04,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 22881 states and 68800 transitions. [2021-07-13 20:16:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:04,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:04,172 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:04,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:04,372 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1645693517, now seen corresponding path program 190 times [2021-07-13 20:16:04,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:04,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133373736] [2021-07-13 20:16:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:04,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:04,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133373736] [2021-07-13 20:16:04,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133373736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:04,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880983582] [2021-07-13 20:16:04,732 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:04,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:04,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:16:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:04,967 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:04,967 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 31 treesize of output 15 [2021-07-13 20:16:04,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:04,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:04,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:04,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:16:05,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:05,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:16:05,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:05,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:05,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:05,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:16:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:05,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880983582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:05,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:05,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:05,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874960377] [2021-07-13 20:16:05,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:05,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:05,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:05,292 INFO L87 Difference]: Start difference. First operand 22881 states and 68800 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:08,229 INFO L93 Difference]: Finished difference Result 26943 states and 79869 transitions. [2021-07-13 20:16:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:16:08,229 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:08,282 INFO L225 Difference]: With dead ends: 26943 [2021-07-13 20:16:08,282 INFO L226 Difference]: Without dead ends: 26578 [2021-07-13 20:16:08,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1771.1ms TimeCoverageRelationStatistics Valid=327, Invalid=4229, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:16:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26578 states. [2021-07-13 20:16:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26578 to 22881. [2021-07-13 20:16:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22881 states, 22880 states have (on average 3.0069493006993007) internal successors, (68799), 22880 states have internal predecessors, (68799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22881 states to 22881 states and 68799 transitions. [2021-07-13 20:16:08,674 INFO L78 Accepts]: Start accepts. Automaton has 22881 states and 68799 transitions. Word has length 54 [2021-07-13 20:16:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:08,674 INFO L482 AbstractCegarLoop]: Abstraction has 22881 states and 68799 transitions. [2021-07-13 20:16:08,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22881 states and 68799 transitions. [2021-07-13 20:16:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:08,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:08,705 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:08,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-07-13 20:16:08,905 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash 721120625, now seen corresponding path program 191 times [2021-07-13 20:16:08,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:08,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269024737] [2021-07-13 20:16:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:09,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:09,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269024737] [2021-07-13 20:16:09,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269024737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:09,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888645471] [2021-07-13 20:16:09,291 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:09,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:16:09,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:09,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:16:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:09,531 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:09,531 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 31 treesize of output 15 [2021-07-13 20:16:09,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:09,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:16:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:09,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:09,730 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 29 treesize of output 13 [2021-07-13 20:16:09,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:09,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:16:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:09,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888645471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:09,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:09,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:09,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233950605] [2021-07-13 20:16:09,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:09,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:09,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:09,892 INFO L87 Difference]: Start difference. First operand 22881 states and 68799 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:13,518 INFO L93 Difference]: Finished difference Result 27204 states and 80474 transitions. [2021-07-13 20:16:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:16:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:13,580 INFO L225 Difference]: With dead ends: 27204 [2021-07-13 20:16:13,580 INFO L226 Difference]: Without dead ends: 26967 [2021-07-13 20:16:13,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2357.9ms TimeCoverageRelationStatistics Valid=401, Invalid=5451, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:16:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26967 states. [2021-07-13 20:16:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26967 to 22970. [2021-07-13 20:16:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22970 states, 22969 states have (on average 3.004963211284775) internal successors, (69021), 22969 states have internal predecessors, (69021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22970 states to 22970 states and 69021 transitions. [2021-07-13 20:16:14,019 INFO L78 Accepts]: Start accepts. Automaton has 22970 states and 69021 transitions. Word has length 54 [2021-07-13 20:16:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:14,019 INFO L482 AbstractCegarLoop]: Abstraction has 22970 states and 69021 transitions. [2021-07-13 20:16:14,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 22970 states and 69021 transitions. [2021-07-13 20:16:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:14,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:14,053 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:14,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 20:16:14,253 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash -228212303, now seen corresponding path program 192 times [2021-07-13 20:16:14,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:14,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747571614] [2021-07-13 20:16:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:14,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747571614] [2021-07-13 20:16:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747571614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920343252] [2021-07-13 20:16:14,621 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:14,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:16:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:16:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:14,862 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:14,862 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 17 [2021-07-13 20:16:14,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:14,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:14,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:14,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:16:15,045 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:15,045 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 25 treesize of output 13 [2021-07-13 20:16:15,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:15,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:15,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:15,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:16:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:15,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920343252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:15,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:15,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:16:15,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110889716] [2021-07-13 20:16:15,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:16:15,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:15,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:16:15,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:16:15,237 INFO L87 Difference]: Start difference. First operand 22970 states and 69021 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:18,178 INFO L93 Difference]: Finished difference Result 27337 states and 80809 transitions. [2021-07-13 20:16:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:16:18,178 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:18,241 INFO L225 Difference]: With dead ends: 27337 [2021-07-13 20:16:18,242 INFO L226 Difference]: Without dead ends: 26958 [2021-07-13 20:16:18,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1990.0ms TimeCoverageRelationStatistics Valid=397, Invalid=5455, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:16:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26958 states. [2021-07-13 20:16:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26958 to 22893. [2021-07-13 20:16:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22893 states, 22892 states have (on average 3.006858291106063) internal successors, (68833), 22892 states have internal predecessors, (68833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22893 states to 22893 states and 68833 transitions. [2021-07-13 20:16:18,696 INFO L78 Accepts]: Start accepts. Automaton has 22893 states and 68833 transitions. Word has length 54 [2021-07-13 20:16:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:18,696 INFO L482 AbstractCegarLoop]: Abstraction has 22893 states and 68833 transitions. [2021-07-13 20:16:18,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 22893 states and 68833 transitions. [2021-07-13 20:16:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:18,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:18,727 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:18,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-13 20:16:18,928 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:18,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1106733457, now seen corresponding path program 193 times [2021-07-13 20:16:18,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:18,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927753297] [2021-07-13 20:16:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:19,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927753297] [2021-07-13 20:16:19,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927753297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:19,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219737575] [2021-07-13 20:16:19,287 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:19,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:16:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:19,525 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:19,525 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 31 treesize of output 15 [2021-07-13 20:16:19,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:19,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:19,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:19,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-07-13 20:16:19,698 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:19,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:16:19,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:19,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:19,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:19,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:16:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:19,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219737575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:19,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:19,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:19,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410438042] [2021-07-13 20:16:19,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:19,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:19,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:19,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:19,851 INFO L87 Difference]: Start difference. First operand 22893 states and 68833 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:23,539 INFO L93 Difference]: Finished difference Result 27953 states and 82510 transitions. [2021-07-13 20:16:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:16:23,539 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:23,606 INFO L225 Difference]: With dead ends: 27953 [2021-07-13 20:16:23,606 INFO L226 Difference]: Without dead ends: 27506 [2021-07-13 20:16:23,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2364.1ms TimeCoverageRelationStatistics Valid=474, Invalid=6666, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:16:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27506 states. [2021-07-13 20:16:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27506 to 22927. [2021-07-13 20:16:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22927 states, 22926 states have (on average 3.006673645642502) internal successors, (68931), 22926 states have internal predecessors, (68931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22927 states to 22927 states and 68931 transitions. [2021-07-13 20:16:24,066 INFO L78 Accepts]: Start accepts. Automaton has 22927 states and 68931 transitions. Word has length 54 [2021-07-13 20:16:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:24,066 INFO L482 AbstractCegarLoop]: Abstraction has 22927 states and 68931 transitions. [2021-07-13 20:16:24,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22927 states and 68931 transitions. [2021-07-13 20:16:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:24,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:24,099 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:24,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 20:16:24,301 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:24,301 INFO L82 PathProgramCache]: Analyzing trace with hash 400152493, now seen corresponding path program 194 times [2021-07-13 20:16:24,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:24,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370832222] [2021-07-13 20:16:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:24,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:24,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370832222] [2021-07-13 20:16:24,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370832222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:24,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745393430] [2021-07-13 20:16:24,665 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:24,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:24,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:16:24,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:24,912 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:16:24,913 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 37 treesize of output 17 [2021-07-13 20:16:24,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:24,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:24,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:24,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-07-13 20:16:25,053 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:25,053 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 25 treesize of output 13 [2021-07-13 20:16:25,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:25,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:16:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:25,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745393430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:25,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:25,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:25,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776774495] [2021-07-13 20:16:25,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:25,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:25,241 INFO L87 Difference]: Start difference. First operand 22927 states and 68931 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:28,834 INFO L93 Difference]: Finished difference Result 30384 states and 89669 transitions. [2021-07-13 20:16:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:16:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:28,911 INFO L225 Difference]: With dead ends: 30384 [2021-07-13 20:16:28,911 INFO L226 Difference]: Without dead ends: 30081 [2021-07-13 20:16:28,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 2372.1ms TimeCoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:16:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30081 states. [2021-07-13 20:16:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30081 to 22924. [2021-07-13 20:16:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22924 states, 22923 states have (on average 3.0067181433494743) internal successors, (68923), 22923 states have internal predecessors, (68923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22924 states to 22924 states and 68923 transitions. [2021-07-13 20:16:29,486 INFO L78 Accepts]: Start accepts. Automaton has 22924 states and 68923 transitions. Word has length 54 [2021-07-13 20:16:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:29,486 INFO L482 AbstractCegarLoop]: Abstraction has 22924 states and 68923 transitions. [2021-07-13 20:16:29,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 22924 states and 68923 transitions. [2021-07-13 20:16:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:29,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:29,520 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:29,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:29,721 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:29,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1994252689, now seen corresponding path program 195 times [2021-07-13 20:16:29,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:29,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634997853] [2021-07-13 20:16:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:30,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:30,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634997853] [2021-07-13 20:16:30,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634997853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:30,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944207545] [2021-07-13 20:16:30,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:30,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:16:30,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:30,335 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:30,336 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 31 treesize of output 15 [2021-07-13 20:16:30,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:30,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:30,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:30,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:16:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:30,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:30,534 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 13 [2021-07-13 20:16:30,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:30,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:30,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:30,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:13 [2021-07-13 20:16:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:30,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944207545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:30,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:30,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:30,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557537848] [2021-07-13 20:16:30,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:30,731 INFO L87 Difference]: Start difference. First operand 22924 states and 68923 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:35,196 INFO L93 Difference]: Finished difference Result 30370 states and 89557 transitions. [2021-07-13 20:16:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:16:35,196 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:35,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:35,260 INFO L225 Difference]: With dead ends: 30370 [2021-07-13 20:16:35,261 INFO L226 Difference]: Without dead ends: 30130 [2021-07-13 20:16:35,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2961.2ms TimeCoverageRelationStatistics Valid=606, Invalid=8324, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:16:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30130 states. [2021-07-13 20:16:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30130 to 23030. [2021-07-13 20:16:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23030 states, 23029 states have (on average 3.0054713621954927) internal successors, (69213), 23029 states have internal predecessors, (69213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23030 states to 23030 states and 69213 transitions. [2021-07-13 20:16:35,690 INFO L78 Accepts]: Start accepts. Automaton has 23030 states and 69213 transitions. Word has length 54 [2021-07-13 20:16:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:35,690 INFO L482 AbstractCegarLoop]: Abstraction has 23030 states and 69213 transitions. [2021-07-13 20:16:35,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 23030 states and 69213 transitions. [2021-07-13 20:16:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:35,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:35,722 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:35,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-07-13 20:16:35,922 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1542890213, now seen corresponding path program 196 times [2021-07-13 20:16:35,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:35,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488589245] [2021-07-13 20:16:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:36,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:36,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488589245] [2021-07-13 20:16:36,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488589245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:36,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100627923] [2021-07-13 20:16:36,278 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:36,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:16:36,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:36,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:36,517 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 17 [2021-07-13 20:16:36,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:36,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:36,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:36,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:16:36,692 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:16:36,693 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 13 [2021-07-13 20:16:36,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:36,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:36,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:36,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:16:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:36,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100627923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:36,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:36,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:36,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633597087] [2021-07-13 20:16:36,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:36,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:36,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:36,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:36,845 INFO L87 Difference]: Start difference. First operand 23030 states and 69213 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:40,078 INFO L93 Difference]: Finished difference Result 27119 states and 80359 transitions. [2021-07-13 20:16:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:16:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:40,137 INFO L225 Difference]: With dead ends: 27119 [2021-07-13 20:16:40,138 INFO L226 Difference]: Without dead ends: 26758 [2021-07-13 20:16:40,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1875.2ms TimeCoverageRelationStatistics Valid=341, Invalid=4489, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:16:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26758 states. [2021-07-13 20:16:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26758 to 23035. [2021-07-13 20:16:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23035 states, 23034 states have (on average 3.005426760441087) internal successors, (69227), 23034 states have internal predecessors, (69227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23035 states to 23035 states and 69227 transitions. [2021-07-13 20:16:40,530 INFO L78 Accepts]: Start accepts. Automaton has 23035 states and 69227 transitions. Word has length 54 [2021-07-13 20:16:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:40,530 INFO L482 AbstractCegarLoop]: Abstraction has 23035 states and 69227 transitions. [2021-07-13 20:16:40,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23035 states and 69227 transitions. [2021-07-13 20:16:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:40,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:40,561 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:40,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:40,762 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1819137279, now seen corresponding path program 197 times [2021-07-13 20:16:40,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:40,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405209573] [2021-07-13 20:16:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:41,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:41,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405209573] [2021-07-13 20:16:41,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405209573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:41,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979014406] [2021-07-13 20:16:41,113 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:41,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:16:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:41,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:16:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:41,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:41,485 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 29 treesize of output 15 [2021-07-13 20:16:41,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:41,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-07-13 20:16:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:41,729 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 25 treesize of output 13 [2021-07-13 20:16:41,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:41,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-13 20:16:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979014406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:41,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:41,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-07-13 20:16:41,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959065853] [2021-07-13 20:16:41,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:16:41,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:16:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:16:41,955 INFO L87 Difference]: Start difference. First operand 23035 states and 69227 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:49,520 INFO L93 Difference]: Finished difference Result 28497 states and 84262 transitions. [2021-07-13 20:16:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-07-13 20:16:49,520 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:49,582 INFO L225 Difference]: With dead ends: 28497 [2021-07-13 20:16:49,583 INFO L226 Difference]: Without dead ends: 28254 [2021-07-13 20:16:49,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5655 ImplicationChecksByTransitivity, 5126.7ms TimeCoverageRelationStatistics Valid=1098, Invalid=17262, Unknown=0, NotChecked=0, Total=18360 [2021-07-13 20:16:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28254 states. [2021-07-13 20:16:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28254 to 23192. [2021-07-13 20:16:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23192 states, 23191 states have (on average 3.0050450605838472) internal successors, (69690), 23191 states have internal predecessors, (69690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23192 states to 23192 states and 69690 transitions. [2021-07-13 20:16:50,011 INFO L78 Accepts]: Start accepts. Automaton has 23192 states and 69690 transitions. Word has length 54 [2021-07-13 20:16:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:50,011 INFO L482 AbstractCegarLoop]: Abstraction has 23192 states and 69690 transitions. [2021-07-13 20:16:50,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 23192 states and 69690 transitions. [2021-07-13 20:16:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:50,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:50,041 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:50,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-13 20:16:50,242 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1262810655, now seen corresponding path program 198 times [2021-07-13 20:16:50,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:50,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728148715] [2021-07-13 20:16:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:50,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:50,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728148715] [2021-07-13 20:16:50,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728148715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:50,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139648690] [2021-07-13 20:16:50,586 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:50,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:16:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:50,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:50,820 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:50,821 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 31 treesize of output 15 [2021-07-13 20:16:50,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:50,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:50,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:50,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:16:50,993 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:50,994 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 29 treesize of output 13 [2021-07-13 20:16:50,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:50,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:50,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:50,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:16:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:51,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139648690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:51,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:51,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:51,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100094590] [2021-07-13 20:16:51,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:51,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:51,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:51,144 INFO L87 Difference]: Start difference. First operand 23192 states and 69690 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:54,386 INFO L93 Difference]: Finished difference Result 27449 states and 81315 transitions. [2021-07-13 20:16:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:16:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:54,446 INFO L225 Difference]: With dead ends: 27449 [2021-07-13 20:16:54,446 INFO L226 Difference]: Without dead ends: 27171 [2021-07-13 20:16:54,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2051.9ms TimeCoverageRelationStatistics Valid=397, Invalid=5303, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:16:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27171 states. [2021-07-13 20:16:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27171 to 23204. [2021-07-13 20:16:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23204 states, 23203 states have (on average 3.0049131577813215) internal successors, (69723), 23203 states have internal predecessors, (69723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23204 states to 23204 states and 69723 transitions. [2021-07-13 20:16:54,875 INFO L78 Accepts]: Start accepts. Automaton has 23204 states and 69723 transitions. Word has length 54 [2021-07-13 20:16:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:54,876 INFO L482 AbstractCegarLoop]: Abstraction has 23204 states and 69723 transitions. [2021-07-13 20:16:54,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 23204 states and 69723 transitions. [2021-07-13 20:16:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:54,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:54,908 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:55,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:55,108 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:55,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1155374283, now seen corresponding path program 199 times [2021-07-13 20:16:55,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:55,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114147529] [2021-07-13 20:16:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:55,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:55,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114147529] [2021-07-13 20:16:55,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114147529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:55,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053072781] [2021-07-13 20:16:55,461 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:16:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:55,842 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-13 20:16:55,853 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:16:55,853 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 17 [2021-07-13 20:16:55,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:55,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:55,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:55,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:16:55,992 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:16:55,992 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 29 treesize of output 13 [2021-07-13 20:16:55,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:55,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:55,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:55,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:16:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:56,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053072781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:56,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:56,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:16:56,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10370423] [2021-07-13 20:16:56,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:56,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:56,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:56,174 INFO L87 Difference]: Start difference. First operand 23204 states and 69723 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:59,286 INFO L93 Difference]: Finished difference Result 29971 states and 88732 transitions. [2021-07-13 20:16:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:16:59,286 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:59,353 INFO L225 Difference]: With dead ends: 29971 [2021-07-13 20:16:59,353 INFO L226 Difference]: Without dead ends: 29750 [2021-07-13 20:16:59,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2151.1ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:16:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29750 states. [2021-07-13 20:16:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29750 to 23208. [2021-07-13 20:16:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23208 states, 23207 states have (on average 3.0048692204938163) internal successors, (69734), 23207 states have internal predecessors, (69734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23208 states to 23208 states and 69734 transitions. [2021-07-13 20:16:59,794 INFO L78 Accepts]: Start accepts. Automaton has 23208 states and 69734 transitions. Word has length 54 [2021-07-13 20:16:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:59,794 INFO L482 AbstractCegarLoop]: Abstraction has 23208 states and 69734 transitions. [2021-07-13 20:16:59,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 23208 states and 69734 transitions. [2021-07-13 20:16:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:59,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:59,824 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:00,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:00,025 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash 438725913, now seen corresponding path program 200 times [2021-07-13 20:17:00,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:00,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360981666] [2021-07-13 20:17:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:00,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:00,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360981666] [2021-07-13 20:17:00,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360981666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:00,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130837359] [2021-07-13 20:17:00,377 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:00,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:17:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:00,614 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:17:00,614 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 37 treesize of output 17 [2021-07-13 20:17:00,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:00,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:00,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:00,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-07-13 20:17:00,755 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:00,755 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 27 treesize of output 13 [2021-07-13 20:17:00,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:00,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:00,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:00,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:17:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:00,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130837359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:00,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:00,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:17:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130625932] [2021-07-13 20:17:00,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:00,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:00,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:00,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:00,937 INFO L87 Difference]: Start difference. First operand 23208 states and 69734 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:04,692 INFO L93 Difference]: Finished difference Result 30547 states and 90298 transitions. [2021-07-13 20:17:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:17:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:04,762 INFO L225 Difference]: With dead ends: 30547 [2021-07-13 20:17:04,762 INFO L226 Difference]: Without dead ends: 30361 [2021-07-13 20:17:04,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 2111.8ms TimeCoverageRelationStatistics Valid=402, Invalid=5604, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:17:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30361 states. [2021-07-13 20:17:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30361 to 23187. [2021-07-13 20:17:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.0050892780125937) internal successors, (69676), 23186 states have internal predecessors, (69676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 69676 transitions. [2021-07-13 20:17:05,206 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 69676 transitions. Word has length 54 [2021-07-13 20:17:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:05,206 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 69676 transitions. [2021-07-13 20:17:05,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 69676 transitions. [2021-07-13 20:17:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:05,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:05,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:05,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:05,436 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -237071215, now seen corresponding path program 201 times [2021-07-13 20:17:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:05,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562599361] [2021-07-13 20:17:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:05,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:05,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562599361] [2021-07-13 20:17:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562599361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:05,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874515099] [2021-07-13 20:17:05,793 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:05,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:17:05,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:17:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:06,030 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:17:06,031 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 15 [2021-07-13 20:17:06,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:06,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:06,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:06,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-07-13 20:17:06,270 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:06,270 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 29 treesize of output 13 [2021-07-13 20:17:06,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:06,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:06,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:06,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:17:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:06,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874515099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:06,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:06,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 40 [2021-07-13 20:17:06,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914922214] [2021-07-13 20:17:06,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:17:06,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:17:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:17:06,489 INFO L87 Difference]: Start difference. First operand 23187 states and 69676 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:09,646 INFO L93 Difference]: Finished difference Result 27180 states and 80545 transitions. [2021-07-13 20:17:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:17:09,646 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:09,704 INFO L225 Difference]: With dead ends: 27180 [2021-07-13 20:17:09,704 INFO L226 Difference]: Without dead ends: 26819 [2021-07-13 20:17:09,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2076.9ms TimeCoverageRelationStatistics Valid=375, Invalid=5477, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:17:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26819 states. [2021-07-13 20:17:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26819 to 23199. [2021-07-13 20:17:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23199 states, 23198 states have (on average 3.005474609880162) internal successors, (69721), 23198 states have internal predecessors, (69721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23199 states to 23199 states and 69721 transitions. [2021-07-13 20:17:10,157 INFO L78 Accepts]: Start accepts. Automaton has 23199 states and 69721 transitions. Word has length 54 [2021-07-13 20:17:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:10,157 INFO L482 AbstractCegarLoop]: Abstraction has 23199 states and 69721 transitions. [2021-07-13 20:17:10,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 23199 states and 69721 transitions. [2021-07-13 20:17:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:10,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:10,189 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:10,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-13 20:17:10,390 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash 375690413, now seen corresponding path program 202 times [2021-07-13 20:17:10,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:10,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012806350] [2021-07-13 20:17:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012806350] [2021-07-13 20:17:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012806350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021764636] [2021-07-13 20:17:10,744 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:10,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:17:10,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:10,983 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:17:10,983 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 15 [2021-07-13 20:17:10,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:10,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:10,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:10,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-07-13 20:17:11,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:11,159 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 29 treesize of output 13 [2021-07-13 20:17:11,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:11,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:11,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:11,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:17:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:11,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021764636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:11,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:11,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:17:11,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377002581] [2021-07-13 20:17:11,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:11,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:11,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:11,313 INFO L87 Difference]: Start difference. First operand 23199 states and 69721 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:14,529 INFO L93 Difference]: Finished difference Result 27285 states and 80957 transitions. [2021-07-13 20:17:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:17:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:14,593 INFO L225 Difference]: With dead ends: 27285 [2021-07-13 20:17:14,593 INFO L226 Difference]: Without dead ends: 26924 [2021-07-13 20:17:14,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1884.5ms TimeCoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:17:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26924 states. [2021-07-13 20:17:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26924 to 23203. [2021-07-13 20:17:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23203 states, 23202 states have (on average 3.0054305663304888) internal successors, (69732), 23202 states have internal predecessors, (69732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23203 states to 23203 states and 69732 transitions. [2021-07-13 20:17:15,040 INFO L78 Accepts]: Start accepts. Automaton has 23203 states and 69732 transitions. Word has length 54 [2021-07-13 20:17:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:15,041 INFO L482 AbstractCegarLoop]: Abstraction has 23203 states and 69732 transitions. [2021-07-13 20:17:15,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23203 states and 69732 transitions. [2021-07-13 20:17:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:15,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:15,074 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:15,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-13 20:17:15,274 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash -557249391, now seen corresponding path program 203 times [2021-07-13 20:17:15,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:15,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498547105] [2021-07-13 20:17:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:15,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498547105] [2021-07-13 20:17:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498547105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172554935] [2021-07-13 20:17:15,682 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:15,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:17:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-13 20:17:15,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:16,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:16,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:16,218 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 29 treesize of output 15 [2021-07-13 20:17:16,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:16,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:16,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:16,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-07-13 20:17:16,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:16,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:16,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:16,481 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 25 treesize of output 13 [2021-07-13 20:17:16,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:16,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:16,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:16,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-13 20:17:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:16,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172554935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:16,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:16,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2021-07-13 20:17:16,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187620244] [2021-07-13 20:17:16,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:17:16,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:17:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:17:16,728 INFO L87 Difference]: Start difference. First operand 23203 states and 69732 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:22,167 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 20:17:27,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:27,981 INFO L93 Difference]: Finished difference Result 30591 states and 90287 transitions. [2021-07-13 20:17:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-07-13 20:17:27,981 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:28,042 INFO L225 Difference]: With dead ends: 30591 [2021-07-13 20:17:28,042 INFO L226 Difference]: Without dead ends: 30348 [2021-07-13 20:17:28,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8486 ImplicationChecksByTransitivity, 7569.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=25858, Unknown=0, NotChecked=0, Total=27390 [2021-07-13 20:17:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30348 states. [2021-07-13 20:17:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30348 to 23322. [2021-07-13 20:17:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23322 states, 23321 states have (on average 3.0053599759873078) internal successors, (70088), 23321 states have internal predecessors, (70088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23322 states to 23322 states and 70088 transitions. [2021-07-13 20:17:28,470 INFO L78 Accepts]: Start accepts. Automaton has 23322 states and 70088 transitions. Word has length 54 [2021-07-13 20:17:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:28,470 INFO L482 AbstractCegarLoop]: Abstraction has 23322 states and 70088 transitions. [2021-07-13 20:17:28,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 23322 states and 70088 transitions. [2021-07-13 20:17:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:28,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:28,501 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:28,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 20:17:28,701 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:28,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1113576015, now seen corresponding path program 204 times [2021-07-13 20:17:28,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:28,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226578986] [2021-07-13 20:17:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:29,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:29,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226578986] [2021-07-13 20:17:29,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226578986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:29,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503841849] [2021-07-13 20:17:29,037 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:29,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:17:29,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:17:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:29,273 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:29,273 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 31 treesize of output 15 [2021-07-13 20:17:29,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:29,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:29,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:29,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-07-13 20:17:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:29,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:29,515 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 27 treesize of output 13 [2021-07-13 20:17:29,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:29,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:29,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:29,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:17:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:29,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503841849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:29,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:29,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:17:29,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319213716] [2021-07-13 20:17:29,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:29,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:29,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:29,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:29,677 INFO L87 Difference]: Start difference. First operand 23322 states and 70088 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:31,762 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-07-13 20:17:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:33,819 INFO L93 Difference]: Finished difference Result 28311 states and 84010 transitions. [2021-07-13 20:17:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:17:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:33,881 INFO L225 Difference]: With dead ends: 28311 [2021-07-13 20:17:33,881 INFO L226 Difference]: Without dead ends: 28138 [2021-07-13 20:17:33,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2513.5ms TimeCoverageRelationStatistics Valid=428, Invalid=5892, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:17:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28138 states. [2021-07-13 20:17:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28138 to 23334. [2021-07-13 20:17:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23334 states, 23333 states have (on average 3.0057429391848456) internal successors, (70133), 23333 states have internal predecessors, (70133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23334 states to 23334 states and 70133 transitions. [2021-07-13 20:17:34,291 INFO L78 Accepts]: Start accepts. Automaton has 23334 states and 70133 transitions. Word has length 54 [2021-07-13 20:17:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:34,291 INFO L482 AbstractCegarLoop]: Abstraction has 23334 states and 70133 transitions. [2021-07-13 20:17:34,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23334 states and 70133 transitions. [2021-07-13 20:17:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:34,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:34,321 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:34,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-13 20:17:34,522 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1506582319, now seen corresponding path program 205 times [2021-07-13 20:17:34,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:34,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381103349] [2021-07-13 20:17:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:34,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:34,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381103349] [2021-07-13 20:17:34,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381103349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:34,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777015531] [2021-07-13 20:17:34,857 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:17:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:35,090 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:17:35,090 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 37 treesize of output 17 [2021-07-13 20:17:35,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:35,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:35,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:35,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-07-13 20:17:35,270 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:17:35,270 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 13 [2021-07-13 20:17:35,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:35,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:35,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:35,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:17:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:35,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777015531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:35,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:35,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:17:35,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629844933] [2021-07-13 20:17:35,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:35,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:35,413 INFO L87 Difference]: Start difference. First operand 23334 states and 70133 transitions. Second operand has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:38,509 INFO L93 Difference]: Finished difference Result 27580 states and 81819 transitions. [2021-07-13 20:17:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:17:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:38,567 INFO L225 Difference]: With dead ends: 27580 [2021-07-13 20:17:38,567 INFO L226 Difference]: Without dead ends: 27330 [2021-07-13 20:17:38,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 2000.5ms TimeCoverageRelationStatistics Valid=383, Invalid=5317, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:17:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27330 states. [2021-07-13 20:17:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27330 to 23334. [2021-07-13 20:17:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23334 states, 23333 states have (on average 3.0052286461235163) internal successors, (70121), 23333 states have internal predecessors, (70121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23334 states to 23334 states and 70121 transitions. [2021-07-13 20:17:39,020 INFO L78 Accepts]: Start accepts. Automaton has 23334 states and 70121 transitions. Word has length 54 [2021-07-13 20:17:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:39,020 INFO L482 AbstractCegarLoop]: Abstraction has 23334 states and 70121 transitions. [2021-07-13 20:17:39,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 23334 states and 70121 transitions. [2021-07-13 20:17:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:39,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:39,054 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:39,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-07-13 20:17:39,255 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 763206343, now seen corresponding path program 206 times [2021-07-13 20:17:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:39,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936075171] [2021-07-13 20:17:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:39,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936075171] [2021-07-13 20:17:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936075171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811660932] [2021-07-13 20:17:39,597 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:39,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:39,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:17:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:39,833 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:17:39,833 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 37 treesize of output 17 [2021-07-13 20:17:39,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:39,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:39,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:39,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-07-13 20:17:39,972 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:39,972 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 27 treesize of output 13 [2021-07-13 20:17:39,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:39,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:39,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:39,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-13 20:17:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:40,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811660932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:40,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:40,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:17:40,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618996813] [2021-07-13 20:17:40,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:40,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:40,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:40,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:40,319 INFO L87 Difference]: Start difference. First operand 23334 states and 70121 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:43,612 INFO L93 Difference]: Finished difference Result 29244 states and 86766 transitions. [2021-07-13 20:17:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:17:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:43,676 INFO L225 Difference]: With dead ends: 29244 [2021-07-13 20:17:43,676 INFO L226 Difference]: Without dead ends: 29023 [2021-07-13 20:17:43,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 2168.2ms TimeCoverageRelationStatistics Valid=368, Invalid=5182, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:17:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29023 states. [2021-07-13 20:17:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29023 to 23338. [2021-07-13 20:17:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23338 states, 23337 states have (on average 3.0051848995157906) internal successors, (70132), 23337 states have internal predecessors, (70132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23338 states to 23338 states and 70132 transitions. [2021-07-13 20:17:44,112 INFO L78 Accepts]: Start accepts. Automaton has 23338 states and 70132 transitions. Word has length 54 [2021-07-13 20:17:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:44,113 INFO L482 AbstractCegarLoop]: Abstraction has 23338 states and 70132 transitions. [2021-07-13 20:17:44,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 23338 states and 70132 transitions. [2021-07-13 20:17:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:44,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:44,145 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:44,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:44,346 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:44,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1937660757, now seen corresponding path program 207 times [2021-07-13 20:17:44,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:44,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682793357] [2021-07-13 20:17:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:44,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682793357] [2021-07-13 20:17:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682793357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939752766] [2021-07-13 20:17:44,685 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:44,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:17:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:44,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:17:44,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:44,919 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:44,920 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 31 treesize of output 15 [2021-07-13 20:17:44,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:44,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:44,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:44,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-07-13 20:17:45,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:45,073 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 31 treesize of output 13 [2021-07-13 20:17:45,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:45,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:45,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:45,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-07-13 20:17:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:45,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939752766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:45,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:45,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:17:45,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183410039] [2021-07-13 20:17:45,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:45,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:45,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:45,335 INFO L87 Difference]: Start difference. First operand 23338 states and 70132 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:50,026 INFO L93 Difference]: Finished difference Result 30917 states and 91609 transitions. [2021-07-13 20:17:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:17:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:50,089 INFO L225 Difference]: With dead ends: 30917 [2021-07-13 20:17:50,089 INFO L226 Difference]: Without dead ends: 30629 [2021-07-13 20:17:50,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 2586.2ms TimeCoverageRelationStatistics Valid=472, Invalid=6838, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:17:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30629 states. [2021-07-13 20:17:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30629 to 23350. [2021-07-13 20:17:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23350 states, 23349 states have (on average 3.004882436078633) internal successors, (70161), 23349 states have internal predecessors, (70161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23350 states to 23350 states and 70161 transitions. [2021-07-13 20:17:50,532 INFO L78 Accepts]: Start accepts. Automaton has 23350 states and 70161 transitions. Word has length 54 [2021-07-13 20:17:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:50,532 INFO L482 AbstractCegarLoop]: Abstraction has 23350 states and 70161 transitions. [2021-07-13 20:17:50,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23350 states and 70161 transitions. [2021-07-13 20:17:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:50,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:50,563 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:50,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-13 20:17:50,764 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash -171894853, now seen corresponding path program 208 times [2021-07-13 20:17:50,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:50,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064240175] [2021-07-13 20:17:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:51,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:51,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064240175] [2021-07-13 20:17:51,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064240175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:51,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256708825] [2021-07-13 20:17:51,177 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:51,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:51,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:17:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:51,525 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:17:51,526 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 17 [2021-07-13 20:17:51,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:51,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:51,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:51,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:17:51,601 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:51,601 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 25 treesize of output 13 [2021-07-13 20:17:51,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:51,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:51,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:51,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:17:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:17:51,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256708825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:51,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:51,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:17:51,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470225020] [2021-07-13 20:17:51,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:51,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:51,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:51,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:51,750 INFO L87 Difference]: Start difference. First operand 23350 states and 70161 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:53,732 INFO L93 Difference]: Finished difference Result 24675 states and 73756 transitions. [2021-07-13 20:17:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:17:53,733 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:53,790 INFO L225 Difference]: With dead ends: 24675 [2021-07-13 20:17:53,790 INFO L226 Difference]: Without dead ends: 24289 [2021-07-13 20:17:53,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1453.4ms TimeCoverageRelationStatistics Valid=257, Invalid=3283, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:17:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24289 states. [2021-07-13 20:17:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24289 to 23431. [2021-07-13 20:17:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23431 states, 23430 states have (on average 3.003371745625267) internal successors, (70369), 23430 states have internal predecessors, (70369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23431 states to 23431 states and 70369 transitions. [2021-07-13 20:17:54,225 INFO L78 Accepts]: Start accepts. Automaton has 23431 states and 70369 transitions. Word has length 54 [2021-07-13 20:17:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:54,225 INFO L482 AbstractCegarLoop]: Abstraction has 23431 states and 70369 transitions. [2021-07-13 20:17:54,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 23431 states and 70369 transitions. [2021-07-13 20:17:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:54,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:54,260 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:54,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:54,460 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash -645055845, now seen corresponding path program 209 times [2021-07-13 20:17:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:54,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088142139] [2021-07-13 20:17:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:54,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:54,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088142139] [2021-07-13 20:17:54,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088142139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:54,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146543215] [2021-07-13 20:17:54,880 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:54,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:17:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:17:54,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:55,191 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:55,191 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 29 treesize of output 17 [2021-07-13 20:17:55,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:55,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:55,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:55,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-07-13 20:17:55,304 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:55,304 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 25 treesize of output 13 [2021-07-13 20:17:55,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:55,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:55,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:55,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:17:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:55,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146543215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:55,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:55,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-07-13 20:17:55,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760736346] [2021-07-13 20:17:55,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:17:55,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:55,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:17:55,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:17:55,507 INFO L87 Difference]: Start difference. First operand 23431 states and 70369 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:57,551 INFO L93 Difference]: Finished difference Result 24688 states and 73775 transitions. [2021-07-13 20:17:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:17:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:57,600 INFO L225 Difference]: With dead ends: 24688 [2021-07-13 20:17:57,600 INFO L226 Difference]: Without dead ends: 24445 [2021-07-13 20:17:57,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1522.8ms TimeCoverageRelationStatistics Valid=267, Invalid=3393, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:17:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24445 states. [2021-07-13 20:17:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24445 to 23435. [2021-07-13 20:17:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23435 states, 23434 states have (on average 3.0033284970555605) internal successors, (70380), 23434 states have internal predecessors, (70380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23435 states to 23435 states and 70380 transitions. [2021-07-13 20:17:58,011 INFO L78 Accepts]: Start accepts. Automaton has 23435 states and 70380 transitions. Word has length 54 [2021-07-13 20:17:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:58,011 INFO L482 AbstractCegarLoop]: Abstraction has 23435 states and 70380 transitions. [2021-07-13 20:17:58,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 23435 states and 70380 transitions. [2021-07-13 20:17:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:58,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:58,041 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:58,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:58,242 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1365057163, now seen corresponding path program 210 times [2021-07-13 20:17:58,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:58,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68603585] [2021-07-13 20:17:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:58,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:58,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68603585] [2021-07-13 20:17:58,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68603585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:58,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973154921] [2021-07-13 20:17:58,631 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:58,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:17:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:58,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:17:58,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:59,063 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 31 treesize of output 17 [2021-07-13 20:17:59,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:59,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:59,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:59,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:30 [2021-07-13 20:17:59,176 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:17:59,176 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 25 treesize of output 13 [2021-07-13 20:17:59,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:59,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:59,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:59,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:17:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:59,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973154921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:59,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:59,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-07-13 20:17:59,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239558069] [2021-07-13 20:17:59,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:17:59,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:17:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:17:59,378 INFO L87 Difference]: Start difference. First operand 23435 states and 70380 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:02,231 INFO L93 Difference]: Finished difference Result 24987 states and 74544 transitions. [2021-07-13 20:18:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:18:02,232 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:02,279 INFO L225 Difference]: With dead ends: 24987 [2021-07-13 20:18:02,279 INFO L226 Difference]: Without dead ends: 24573 [2021-07-13 20:18:02,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 2114.7ms TimeCoverageRelationStatistics Valid=428, Invalid=5578, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:18:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24573 states. [2021-07-13 20:18:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24573 to 23501. [2021-07-13 20:18:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23501 states, 23500 states have (on average 3.0033617021276595) internal successors, (70579), 23500 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23501 states to 23501 states and 70579 transitions. [2021-07-13 20:18:02,686 INFO L78 Accepts]: Start accepts. Automaton has 23501 states and 70579 transitions. Word has length 54 [2021-07-13 20:18:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:02,686 INFO L482 AbstractCegarLoop]: Abstraction has 23501 states and 70579 transitions. [2021-07-13 20:18:02,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 23501 states and 70579 transitions. [2021-07-13 20:18:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:02,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:02,716 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:02,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:02,917 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1548170717, now seen corresponding path program 211 times [2021-07-13 20:18:02,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:02,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170751244] [2021-07-13 20:18:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:03,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:03,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170751244] [2021-07-13 20:18:03,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170751244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:03,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437983639] [2021-07-13 20:18:03,315 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:03,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:18:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:03,638 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:03,638 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 33 treesize of output 17 [2021-07-13 20:18:03,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:03,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:03,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:03,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:18:03,752 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:03,752 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 25 treesize of output 13 [2021-07-13 20:18:03,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:03,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:03,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:03,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:03,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437983639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:03,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:03,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:18:03,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134755740] [2021-07-13 20:18:03,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:03,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:03,903 INFO L87 Difference]: Start difference. First operand 23501 states and 70579 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:05,951 INFO L93 Difference]: Finished difference Result 24735 states and 73916 transitions. [2021-07-13 20:18:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:18:05,952 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:06,003 INFO L225 Difference]: With dead ends: 24735 [2021-07-13 20:18:06,003 INFO L226 Difference]: Without dead ends: 24354 [2021-07-13 20:18:06,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1484.2ms TimeCoverageRelationStatistics Valid=257, Invalid=3403, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:18:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24354 states. [2021-07-13 20:18:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24354 to 23501. [2021-07-13 20:18:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23501 states, 23500 states have (on average 3.00268085106383) internal successors, (70563), 23500 states have internal predecessors, (70563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23501 states to 23501 states and 70563 transitions. [2021-07-13 20:18:06,410 INFO L78 Accepts]: Start accepts. Automaton has 23501 states and 70563 transitions. Word has length 54 [2021-07-13 20:18:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:06,410 INFO L482 AbstractCegarLoop]: Abstraction has 23501 states and 70563 transitions. [2021-07-13 20:18:06,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23501 states and 70563 transitions. [2021-07-13 20:18:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:06,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:06,441 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:06,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:06,641 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -886297759, now seen corresponding path program 212 times [2021-07-13 20:18:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:06,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895066245] [2021-07-13 20:18:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:07,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895066245] [2021-07-13 20:18:07,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895066245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459561832] [2021-07-13 20:18:07,126 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:07,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:18:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:07,442 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:07,442 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 17 [2021-07-13 20:18:07,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:07,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:07,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:07,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:18:07,662 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:07,662 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 25 treesize of output 13 [2021-07-13 20:18:07,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:07,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:07,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:07,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:07,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459561832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:07,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:07,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-07-13 20:18:07,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320560087] [2021-07-13 20:18:07,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:18:07,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:07,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:18:07,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:18:07,811 INFO L87 Difference]: Start difference. First operand 23501 states and 70563 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:09,872 INFO L93 Difference]: Finished difference Result 24747 states and 73948 transitions. [2021-07-13 20:18:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:18:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:09,919 INFO L225 Difference]: With dead ends: 24747 [2021-07-13 20:18:09,919 INFO L226 Difference]: Without dead ends: 24409 [2021-07-13 20:18:09,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1631.9ms TimeCoverageRelationStatistics Valid=281, Invalid=3625, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:18:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24409 states. [2021-07-13 20:18:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24409 to 23513. [2021-07-13 20:18:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23513 states, 23512 states have (on average 3.0025518883974143) internal successors, (70596), 23512 states have internal predecessors, (70596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23513 states to 23513 states and 70596 transitions. [2021-07-13 20:18:10,318 INFO L78 Accepts]: Start accepts. Automaton has 23513 states and 70596 transitions. Word has length 54 [2021-07-13 20:18:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:10,318 INFO L482 AbstractCegarLoop]: Abstraction has 23513 states and 70596 transitions. [2021-07-13 20:18:10,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 23513 states and 70596 transitions. [2021-07-13 20:18:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:10,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:10,349 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:10,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-13 20:18:10,549 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:10,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1789412631, now seen corresponding path program 213 times [2021-07-13 20:18:10,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:10,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954192315] [2021-07-13 20:18:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:10,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:10,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954192315] [2021-07-13 20:18:10,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954192315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:10,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427878505] [2021-07-13 20:18:10,939 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:10,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:10,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:10,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:18:10,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:11,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:11,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:11,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:11,325 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 31 treesize of output 17 [2021-07-13 20:18:11,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:11,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:11,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:11,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:25 [2021-07-13 20:18:11,472 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:11,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:18:11,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:11,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:11,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:11,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:11,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427878505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:11,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:11,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-07-13 20:18:11,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837533401] [2021-07-13 20:18:11,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:18:11,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:18:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:18:11,624 INFO L87 Difference]: Start difference. First operand 23513 states and 70596 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:14,801 INFO L93 Difference]: Finished difference Result 24990 states and 74563 transitions. [2021-07-13 20:18:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:18:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:14,858 INFO L225 Difference]: With dead ends: 24990 [2021-07-13 20:18:14,858 INFO L226 Difference]: Without dead ends: 24625 [2021-07-13 20:18:14,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2222.8ms TimeCoverageRelationStatistics Valid=432, Invalid=5730, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:18:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24625 states. [2021-07-13 20:18:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24625 to 23529. [2021-07-13 20:18:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23529 states, 23528 states have (on average 3.0018701122067326) internal successors, (70628), 23528 states have internal predecessors, (70628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23529 states to 23529 states and 70628 transitions. [2021-07-13 20:18:15,250 INFO L78 Accepts]: Start accepts. Automaton has 23529 states and 70628 transitions. Word has length 54 [2021-07-13 20:18:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:15,251 INFO L482 AbstractCegarLoop]: Abstraction has 23529 states and 70628 transitions. [2021-07-13 20:18:15,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 23529 states and 70628 transitions. [2021-07-13 20:18:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:15,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:15,283 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:15,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 20:18:15,483 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash 286362491, now seen corresponding path program 214 times [2021-07-13 20:18:15,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:15,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974365432] [2021-07-13 20:18:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:15,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:15,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974365432] [2021-07-13 20:18:15,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974365432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:15,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326030] [2021-07-13 20:18:15,855 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:15,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:18:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:16,132 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:16,132 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 17 [2021-07-13 20:18:16,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:16,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:16,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:16,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:25 [2021-07-13 20:18:16,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:16,272 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 25 treesize of output 13 [2021-07-13 20:18:16,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:16,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:16,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:16,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:16,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:16,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:18:16,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878901794] [2021-07-13 20:18:16,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:16,425 INFO L87 Difference]: Start difference. First operand 23529 states and 70628 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:18,644 INFO L93 Difference]: Finished difference Result 24923 states and 74381 transitions. [2021-07-13 20:18:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:18:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:18,692 INFO L225 Difference]: With dead ends: 24923 [2021-07-13 20:18:18,692 INFO L226 Difference]: Without dead ends: 24562 [2021-07-13 20:18:18,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1562.0ms TimeCoverageRelationStatistics Valid=277, Invalid=3755, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:18:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24562 states. [2021-07-13 20:18:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24562 to 23457. [2021-07-13 20:18:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23457 states, 23456 states have (on average 3.0036664392905865) internal successors, (70454), 23456 states have internal predecessors, (70454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23457 states to 23457 states and 70454 transitions. [2021-07-13 20:18:19,090 INFO L78 Accepts]: Start accepts. Automaton has 23457 states and 70454 transitions. Word has length 54 [2021-07-13 20:18:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:19,090 INFO L482 AbstractCegarLoop]: Abstraction has 23457 states and 70454 transitions. [2021-07-13 20:18:19,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 23457 states and 70454 transitions. [2021-07-13 20:18:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:19,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:19,120 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:19,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-13 20:18:19,321 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1622498363, now seen corresponding path program 215 times [2021-07-13 20:18:19,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:19,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465808931] [2021-07-13 20:18:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:19,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:19,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465808931] [2021-07-13 20:18:19,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465808931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:19,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527179000] [2021-07-13 20:18:19,740 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:19,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:18:19,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:18:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,432 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:18:20,432 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 46 [2021-07-13 20:18:20,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:20,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:48 [2021-07-13 20:18:20,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,574 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 25 treesize of output 13 [2021-07-13 20:18:20,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,579 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 25 treesize of output 13 [2021-07-13 20:18:20,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,584 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:20,584 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 25 treesize of output 13 [2021-07-13 20:18:20,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:20,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:18:20,608 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:115, output treesize:61 [2021-07-13 20:18:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:21,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527179000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:21,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:21,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 46 [2021-07-13 20:18:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324252633] [2021-07-13 20:18:21,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:18:21,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:18:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2044, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:18:21,175 INFO L87 Difference]: Start difference. First operand 23457 states and 70454 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:28,473 INFO L93 Difference]: Finished difference Result 26052 states and 77272 transitions. [2021-07-13 20:18:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:18:28,473 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:28,535 INFO L225 Difference]: With dead ends: 26052 [2021-07-13 20:18:28,535 INFO L226 Difference]: Without dead ends: 25526 [2021-07-13 20:18:28,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 5469.3ms TimeCoverageRelationStatistics Valid=815, Invalid=14685, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:18:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25526 states. [2021-07-13 20:18:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25526 to 23632. [2021-07-13 20:18:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23632 states, 23631 states have (on average 3.0015657399179045) internal successors, (70930), 23631 states have internal predecessors, (70930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23632 states to 23632 states and 70930 transitions. [2021-07-13 20:18:28,988 INFO L78 Accepts]: Start accepts. Automaton has 23632 states and 70930 transitions. Word has length 54 [2021-07-13 20:18:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:28,988 INFO L482 AbstractCegarLoop]: Abstraction has 23632 states and 70930 transitions. [2021-07-13 20:18:28,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 23632 states and 70930 transitions. [2021-07-13 20:18:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:29,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:29,020 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:29,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-13 20:18:29,220 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:29,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1952467615, now seen corresponding path program 216 times [2021-07-13 20:18:29,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:29,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832641190] [2021-07-13 20:18:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:29,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:29,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832641190] [2021-07-13 20:18:29,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832641190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:29,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962517847] [2021-07-13 20:18:29,679 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:29,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:18:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:30,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:30,035 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 29 treesize of output 17 [2021-07-13 20:18:30,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:30,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:30,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:30,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:18:30,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:30,131 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 27 treesize of output 13 [2021-07-13 20:18:30,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:30,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:30,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:30,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:13 [2021-07-13 20:18:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:30,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962517847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:30,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:30,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:18:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13027930] [2021-07-13 20:18:30,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:30,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:30,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:30,297 INFO L87 Difference]: Start difference. First operand 23632 states and 70930 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:32,547 INFO L93 Difference]: Finished difference Result 25230 states and 75220 transitions. [2021-07-13 20:18:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:18:32,547 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:32,601 INFO L225 Difference]: With dead ends: 25230 [2021-07-13 20:18:32,601 INFO L226 Difference]: Without dead ends: 25057 [2021-07-13 20:18:32,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1580.9ms TimeCoverageRelationStatistics Valid=254, Invalid=3168, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:18:32,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25057 states. [2021-07-13 20:18:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25057 to 23756. [2021-07-13 20:18:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23756 states, 23755 states have (on average 3.0002104820037885) internal successors, (71270), 23755 states have internal predecessors, (71270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23756 states to 23756 states and 71270 transitions. [2021-07-13 20:18:32,999 INFO L78 Accepts]: Start accepts. Automaton has 23756 states and 71270 transitions. Word has length 54 [2021-07-13 20:18:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:32,999 INFO L482 AbstractCegarLoop]: Abstraction has 23756 states and 71270 transitions. [2021-07-13 20:18:33,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 23756 states and 71270 transitions. [2021-07-13 20:18:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:33,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:33,029 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:33,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:33,230 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1203975317, now seen corresponding path program 217 times [2021-07-13 20:18:33,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:33,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632118884] [2021-07-13 20:18:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:33,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:33,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632118884] [2021-07-13 20:18:33,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632118884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:33,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996657292] [2021-07-13 20:18:33,664 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:18:33,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:34,010 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:34,010 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 17 [2021-07-13 20:18:34,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:34,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-07-13 20:18:34,092 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:34,092 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 29 treesize of output 13 [2021-07-13 20:18:34,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:34,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:18:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:34,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996657292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:34,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:34,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:18:34,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185333754] [2021-07-13 20:18:34,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:34,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:34,230 INFO L87 Difference]: Start difference. First operand 23756 states and 71270 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:36,057 INFO L93 Difference]: Finished difference Result 25186 states and 75106 transitions. [2021-07-13 20:18:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:18:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:36,110 INFO L225 Difference]: With dead ends: 25186 [2021-07-13 20:18:36,110 INFO L226 Difference]: Without dead ends: 24876 [2021-07-13 20:18:36,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1405.5ms TimeCoverageRelationStatistics Valid=245, Invalid=3061, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:18:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24876 states. [2021-07-13 20:18:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24876 to 23708. [2021-07-13 20:18:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23708 states, 23707 states have (on average 3.0007170877799805) internal successors, (71138), 23707 states have internal predecessors, (71138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23708 states to 23708 states and 71138 transitions. [2021-07-13 20:18:36,499 INFO L78 Accepts]: Start accepts. Automaton has 23708 states and 71138 transitions. Word has length 54 [2021-07-13 20:18:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:36,499 INFO L482 AbstractCegarLoop]: Abstraction has 23708 states and 71138 transitions. [2021-07-13 20:18:36,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 23708 states and 71138 transitions. [2021-07-13 20:18:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:36,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:36,532 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:36,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 20:18:36,732 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:36,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2095659355, now seen corresponding path program 218 times [2021-07-13 20:18:36,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:36,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405404852] [2021-07-13 20:18:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:37,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:37,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405404852] [2021-07-13 20:18:37,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405404852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:37,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949526577] [2021-07-13 20:18:37,146 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:37,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:37,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:37,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:18:37,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:37,459 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:37,459 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 17 [2021-07-13 20:18:37,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:37,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-07-13 20:18:37,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:37,571 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 25 treesize of output 13 [2021-07-13 20:18:37,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:37,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:37,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:37,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949526577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:37,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:37,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:18:37,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286786804] [2021-07-13 20:18:37,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:37,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:37,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:37,719 INFO L87 Difference]: Start difference. First operand 23708 states and 71138 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:39,808 INFO L93 Difference]: Finished difference Result 25262 states and 75290 transitions. [2021-07-13 20:18:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:18:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:39,862 INFO L225 Difference]: With dead ends: 25262 [2021-07-13 20:18:39,862 INFO L226 Difference]: Without dead ends: 24879 [2021-07-13 20:18:39,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=260, Invalid=3400, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:18:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24879 states. [2021-07-13 20:18:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24879 to 23692. [2021-07-13 20:18:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23692 states, 23691 states have (on average 3.001561774513528) internal successors, (71110), 23691 states have internal predecessors, (71110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23692 states to 23692 states and 71110 transitions. [2021-07-13 20:18:40,341 INFO L78 Accepts]: Start accepts. Automaton has 23692 states and 71110 transitions. Word has length 54 [2021-07-13 20:18:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:40,341 INFO L482 AbstractCegarLoop]: Abstraction has 23692 states and 71110 transitions. [2021-07-13 20:18:40,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 23692 states and 71110 transitions. [2021-07-13 20:18:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:40,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:40,374 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:40,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:40,575 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1296193069, now seen corresponding path program 219 times [2021-07-13 20:18:40,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:40,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093502125] [2021-07-13 20:18:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:40,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:40,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093502125] [2021-07-13 20:18:40,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093502125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:40,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66658730] [2021-07-13 20:18:40,977 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:41,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:41,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:18:41,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:41,384 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:41,384 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 29 treesize of output 17 [2021-07-13 20:18:41,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:41,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:41,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:41,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-07-13 20:18:41,496 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:41,496 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 25 treesize of output 13 [2021-07-13 20:18:41,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:41,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:41,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:41,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:41,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66658730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:41,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:41,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-07-13 20:18:41,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792473241] [2021-07-13 20:18:41,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:18:41,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:41,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:18:41,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:18:41,645 INFO L87 Difference]: Start difference. First operand 23692 states and 71110 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:43,976 INFO L93 Difference]: Finished difference Result 26351 states and 78476 transitions. [2021-07-13 20:18:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:18:43,977 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:43,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:44,033 INFO L225 Difference]: With dead ends: 26351 [2021-07-13 20:18:44,034 INFO L226 Difference]: Without dead ends: 25962 [2021-07-13 20:18:44,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1669.7ms TimeCoverageRelationStatistics Valid=301, Invalid=3859, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:18:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25962 states. [2021-07-13 20:18:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25962 to 23692. [2021-07-13 20:18:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23692 states, 23691 states have (on average 3.0008864125617323) internal successors, (71094), 23691 states have internal predecessors, (71094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23692 states to 23692 states and 71094 transitions. [2021-07-13 20:18:44,431 INFO L78 Accepts]: Start accepts. Automaton has 23692 states and 71094 transitions. Word has length 54 [2021-07-13 20:18:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:44,432 INFO L482 AbstractCegarLoop]: Abstraction has 23692 states and 71094 transitions. [2021-07-13 20:18:44,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 23692 states and 71094 transitions. [2021-07-13 20:18:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:44,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:44,464 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:44,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-07-13 20:18:44,665 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash 286026671, now seen corresponding path program 220 times [2021-07-13 20:18:44,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:44,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768022434] [2021-07-13 20:18:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:45,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:45,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768022434] [2021-07-13 20:18:45,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768022434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:45,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297356603] [2021-07-13 20:18:45,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:45,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:45,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:18:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:45,351 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:18:45,351 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 17 [2021-07-13 20:18:45,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:45,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:45,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:45,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-07-13 20:18:45,493 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:45,493 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 25 treesize of output 13 [2021-07-13 20:18:45,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:45,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:45,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:45,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:18:45,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297356603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:45,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:45,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:18:45,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985322545] [2021-07-13 20:18:45,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:45,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:45,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:45,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:45,641 INFO L87 Difference]: Start difference. First operand 23692 states and 71094 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:47,894 INFO L93 Difference]: Finished difference Result 25252 states and 75275 transitions. [2021-07-13 20:18:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:18:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:47,949 INFO L225 Difference]: With dead ends: 25252 [2021-07-13 20:18:47,950 INFO L226 Difference]: Without dead ends: 24914 [2021-07-13 20:18:47,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1514.4ms TimeCoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:18:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2021-07-13 20:18:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 23704. [2021-07-13 20:18:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23704 states, 23703 states have (on average 3.0007593975446145) internal successors, (71127), 23703 states have internal predecessors, (71127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23704 states to 23704 states and 71127 transitions. [2021-07-13 20:18:48,465 INFO L78 Accepts]: Start accepts. Automaton has 23704 states and 71127 transitions. Word has length 54 [2021-07-13 20:18:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:48,465 INFO L482 AbstractCegarLoop]: Abstraction has 23704 states and 71127 transitions. [2021-07-13 20:18:48,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 23704 states and 71127 transitions. [2021-07-13 20:18:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:48,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:48,498 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:48,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-13 20:18:48,699 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash -617088201, now seen corresponding path program 221 times [2021-07-13 20:18:48,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:48,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898631603] [2021-07-13 20:18:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:49,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:49,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898631603] [2021-07-13 20:18:49,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898631603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496114309] [2021-07-13 20:18:49,087 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:49,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:18:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:49,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:18:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:49,367 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:49,367 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 27 treesize of output 15 [2021-07-13 20:18:49,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:49,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-07-13 20:18:49,510 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:49,510 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 25 treesize of output 13 [2021-07-13 20:18:49,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:49,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:49,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:18:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496114309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:49,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-07-13 20:18:49,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889288136] [2021-07-13 20:18:49,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:18:49,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:18:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:18:49,729 INFO L87 Difference]: Start difference. First operand 23704 states and 71127 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:51,656 INFO L93 Difference]: Finished difference Result 25262 states and 75292 transitions. [2021-07-13 20:18:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:18:51,657 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:51,716 INFO L225 Difference]: With dead ends: 25262 [2021-07-13 20:18:51,717 INFO L226 Difference]: Without dead ends: 25019 [2021-07-13 20:18:51,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1484.1ms TimeCoverageRelationStatistics Valid=285, Invalid=3621, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:18:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25019 states. [2021-07-13 20:18:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25019 to 23704. [2021-07-13 20:18:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23704 states, 23703 states have (on average 3.0007593975446145) internal successors, (71127), 23703 states have internal predecessors, (71127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23704 states to 23704 states and 71127 transitions. [2021-07-13 20:18:52,140 INFO L78 Accepts]: Start accepts. Automaton has 23704 states and 71127 transitions. Word has length 54 [2021-07-13 20:18:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:52,140 INFO L482 AbstractCegarLoop]: Abstraction has 23704 states and 71127 transitions. [2021-07-13 20:18:52,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23704 states and 71127 transitions. [2021-07-13 20:18:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:52,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:52,171 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:52,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-07-13 20:18:52,371 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1337089519, now seen corresponding path program 222 times [2021-07-13 20:18:52,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:52,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471762453] [2021-07-13 20:18:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:52,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:52,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471762453] [2021-07-13 20:18:52,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471762453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115749840] [2021-07-13 20:18:52,765 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:52,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:52,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:18:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:53,041 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:53,042 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:18:53,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:53,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-07-13 20:18:53,181 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:18:53,181 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 25 treesize of output 13 [2021-07-13 20:18:53,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:53,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:18:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115749840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:53,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:18:53,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60578701] [2021-07-13 20:18:53,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:18:53,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:18:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:18:53,385 INFO L87 Difference]: Start difference. First operand 23704 states and 71127 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:55,634 INFO L93 Difference]: Finished difference Result 25176 states and 75070 transitions. [2021-07-13 20:18:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:18:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:55,690 INFO L225 Difference]: With dead ends: 25176 [2021-07-13 20:18:55,690 INFO L226 Difference]: Without dead ends: 24859 [2021-07-13 20:18:55,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1588.2ms TimeCoverageRelationStatistics Valid=296, Invalid=3864, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:18:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24859 states. [2021-07-13 20:18:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24859 to 23704. [2021-07-13 20:18:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23704 states, 23703 states have (on average 3.0005906425347004) internal successors, (71123), 23703 states have internal predecessors, (71123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23704 states to 23704 states and 71123 transitions. [2021-07-13 20:18:56,215 INFO L78 Accepts]: Start accepts. Automaton has 23704 states and 71123 transitions. Word has length 54 [2021-07-13 20:18:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:56,215 INFO L482 AbstractCegarLoop]: Abstraction has 23704 states and 71123 transitions. [2021-07-13 20:18:56,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 23704 states and 71123 transitions. [2021-07-13 20:18:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:56,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:56,248 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:56,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:56,448 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1458686921, now seen corresponding path program 223 times [2021-07-13 20:18:56,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:56,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636377605] [2021-07-13 20:18:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:56,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636377605] [2021-07-13 20:18:56,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636377605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315516949] [2021-07-13 20:18:56,823 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:18:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-07-13 20:18:57,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:57,174 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:18:57,175 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:18:57,177 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:18:57,177 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:18:57 BasicIcfg [2021-07-13 20:18:57,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:18:57,177 INFO L168 Benchmark]: Toolchain (without parser) took 734640.25 ms. Allocated memory was 187.7 MB in the beginning and 5.4 GB in the end (delta: 5.3 GB). Free memory was 167.2 MB in the beginning and 3.0 GB in the end (delta: -2.8 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:57,177 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:18:57,177 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.16 ms. Allocated memory is still 187.7 MB. Free memory was 167.1 MB in the beginning and 165.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:57,177 INFO L168 Benchmark]: Boogie Preprocessor took 24.77 ms. Allocated memory is still 187.7 MB. Free memory was 165.6 MB in the beginning and 164.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:57,177 INFO L168 Benchmark]: RCFGBuilder took 330.54 ms. Allocated memory is still 187.7 MB. Free memory was 164.5 MB in the beginning and 148.7 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:57,177 INFO L168 Benchmark]: TraceAbstraction took 734253.60 ms. Allocated memory was 187.7 MB in the beginning and 5.4 GB in the end (delta: 5.3 GB). Free memory was 148.3 MB in the beginning and 3.0 GB in the end (delta: -2.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:57,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.16 ms. Allocated memory is still 187.7 MB. Free memory was 167.1 MB in the beginning and 165.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.77 ms. Allocated memory is still 187.7 MB. Free memory was 165.6 MB in the beginning and 164.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 330.54 ms. Allocated memory is still 187.7 MB. Free memory was 164.5 MB in the beginning and 148.7 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 734253.60 ms. Allocated memory was 187.7 MB in the beginning and 5.4 GB in the end (delta: 5.3 GB). Free memory was 148.3 MB in the beginning and 3.0 GB in the end (delta: -2.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 55 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 63 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 734129.1ms, OverallIterations: 231, TraceHistogramMax: 3, EmptinessCheckTime: 4537.0ms, AutomataDifference: 451437.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38167 SDtfs, 83663 SDslu, 640568 SDs, 0 SdLazy, 552155 SolverSat, 12525 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 187665.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21041 GetRequests, 7598 SyntacticMatches, 646 SemanticMatches, 12797 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202164 ImplicationChecksByTransitivity, 314495.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23756occurred in iteration=224, InterpolantAutomatonStates: 9379, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57831.3ms AutomataMinimizationTime, 230 MinimizatonAttempts, 621288 StatesRemovedByMinimization, 226 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1155.1ms SsaConstructionTime, 3571.7ms SatisfiabilityAnalysisTime, 163550.4ms InterpolantComputationTime, 21670 NumberOfCodeBlocks, 21663 NumberOfCodeBlocksAsserted, 718 NumberOfCheckSat, 21214 ConstructedInterpolants, 281 QuantifiedInterpolants, 329198 SizeOfPredicates, 2522 NumberOfNonLiveVariables, 26140 ConjunctsInSsa, 8674 ConjunctsInUnsatCore, 456 InterpolantComputations, 5 PerfectInterpolantSequences, 1252/11589 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