/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-bad/ring-nondet.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:33:39,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:33:39,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:33:39,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:33:39,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 21:33:39,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:33:39,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:33:39,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:33:39,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:33:39,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:33:39,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:33:39,475 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:33:39,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:33:39,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:33:39,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:33:39,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:33:39,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:33:39,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:33:39,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:33:39,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:33:39,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:33:39,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:33:39,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:33:39,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:33:39,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:33:39,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:33:39,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:33:39,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:33:39,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:33:39,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:33:39,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:33:39,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:33:39,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:33:39,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:33:39,479 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:33:39,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:33:39,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:33:39,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:33:39,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:33:39,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:33:39,798 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:33:39,799 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:33:39,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl [2021-06-12 21:33:39,800 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring-nondet.wvr.bpl' [2021-06-12 21:33:39,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:33:39,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:33:39,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:33:39,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:33:39,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:33:39,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:33:39,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:33:39,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:33:39,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:33:39,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... [2021-06-12 21:33:39,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:33:39,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:33:39,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:33:39,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:33:39,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:33:39,984 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:33:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:33:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:33:39,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:33:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:33:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:33:39,986 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:33:39,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:33:39,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:33:39,987 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:33:39,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:33:39,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:33:39,988 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:33:40,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:33:40,288 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:33:40,290 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:33:40 BoogieIcfgContainer [2021-06-12 21:33:40,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:33:40,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:33:40,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:33:40,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:33:40,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:33:39" (1/2) ... [2021-06-12 21:33:40,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14962bc8 and model type ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:33:40, skipping insertion in model container [2021-06-12 21:33:40,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:33:40" (2/2) ... [2021-06-12 21:33:40,296 INFO L111 eAbstractionObserver]: Analyzing ICFG ring-nondet.wvr.bpl [2021-06-12 21:33:40,301 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:33:40,301 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:33:40,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:33:40,302 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:33:40,332 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 21:33:40,351 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 21:33:40,367 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:33:40,368 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:33:40,368 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:33:40,368 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:33:40,368 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:33:40,368 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:33:40,368 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:33:40,368 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:33:40,376 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-12 21:33:40,436 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:33:40,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:40,453 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:40,453 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1495535584, now seen corresponding path program 1 times [2021-06-12 21:33:40,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:40,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132121951] [2021-06-12 21:33:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:40,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:40,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132121951] [2021-06-12 21:33:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132121951] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:33:40,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:33:40,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:33:40,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676887940] [2021-06-12 21:33:40,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:33:40,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:40,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:33:40,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:40,640 INFO L87 Difference]: Start difference. First operand has 348 states, 346 states have (on average 2.9421965317919074) internal successors, (1018), 347 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:40,688 INFO L93 Difference]: Finished difference Result 393 states and 1157 transitions. [2021-06-12 21:33:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:33:40,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 21:33:40,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:40,713 INFO L225 Difference]: With dead ends: 393 [2021-06-12 21:33:40,713 INFO L226 Difference]: Without dead ends: 393 [2021-06-12 21:33:40,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-12 21:33:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2021-06-12 21:33:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.951530612244898) internal successors, (1157), 392 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1157 transitions. [2021-06-12 21:33:40,781 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1157 transitions. Word has length 16 [2021-06-12 21:33:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:40,781 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1157 transitions. [2021-06-12 21:33:40,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1157 transitions. [2021-06-12 21:33:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:33:40,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:40,785 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:40,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:33:40,786 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1760185073, now seen corresponding path program 1 times [2021-06-12 21:33:40,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:40,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597955210] [2021-06-12 21:33:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:40,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:40,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597955210] [2021-06-12 21:33:40,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597955210] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:33:40,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:33:40,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:33:40,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346686340] [2021-06-12 21:33:40,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:33:40,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:33:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:40,839 INFO L87 Difference]: Start difference. First operand 393 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2021-06-12 21:33:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:40,864 INFO L93 Difference]: Finished difference Result 442 states and 1303 transitions. [2021-06-12 21:33:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:33:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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 [2021-06-12 21:33:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:40,871 INFO L225 Difference]: With dead ends: 442 [2021-06-12 21:33:40,871 INFO L226 Difference]: Without dead ends: 442 [2021-06-12 21:33:40,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-12 21:33:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-06-12 21:33:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.9546485260770976) internal successors, (1303), 441 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1303 transitions. [2021-06-12 21:33:40,909 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1303 transitions. Word has length 21 [2021-06-12 21:33:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:40,910 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1303 transitions. [2021-06-12 21:33:40,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2021-06-12 21:33:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1303 transitions. [2021-06-12 21:33:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:33:40,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:40,916 INFO L472 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] [2021-06-12 21:33:40,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:33:40,917 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash 992917241, now seen corresponding path program 1 times [2021-06-12 21:33:40,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:40,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284140333] [2021-06-12 21:33:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:33:40,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:40,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284140333] [2021-06-12 21:33:40,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284140333] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:33:40,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:33:40,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:33:40,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924842986] [2021-06-12 21:33:40,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:33:40,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:40,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:33:40,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:41,000 INFO L87 Difference]: Start difference. First operand 442 states and 1303 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:41,015 INFO L93 Difference]: Finished difference Result 880 states and 2602 transitions. [2021-06-12 21:33:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:33:41,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:33:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:41,020 INFO L225 Difference]: With dead ends: 880 [2021-06-12 21:33:41,022 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 21:33:41,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 21:33:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 515. [2021-06-12 21:33:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.9591439688715955) internal successors, (1521), 514 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1521 transitions. [2021-06-12 21:33:41,055 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1521 transitions. Word has length 26 [2021-06-12 21:33:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:41,055 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1521 transitions. [2021-06-12 21:33:41,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1521 transitions. [2021-06-12 21:33:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:33:41,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:41,057 INFO L472 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] [2021-06-12 21:33:41,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 21:33:41,058 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:41,059 INFO L82 PathProgramCache]: Analyzing trace with hash -92913957, now seen corresponding path program 1 times [2021-06-12 21:33:41,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:41,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103504552] [2021-06-12 21:33:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:41,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103504552] [2021-06-12 21:33:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103504552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:41,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343605765] [2021-06-12 21:33:41,155 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 [2021-06-12 21:33:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:41,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:33:41,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:33:41,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343605765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:41,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:41,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-06-12 21:33:41,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288700007] [2021-06-12 21:33:41,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:33:41,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:41,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:33:41,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:33:41,415 INFO L87 Difference]: Start difference. First operand 515 states and 1521 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:41,594 INFO L93 Difference]: Finished difference Result 1639 states and 4869 transitions. [2021-06-12 21:33:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:33:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:33:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:41,604 INFO L225 Difference]: With dead ends: 1639 [2021-06-12 21:33:41,604 INFO L226 Difference]: Without dead ends: 1137 [2021-06-12 21:33:41,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:33:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-12 21:33:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 843. [2021-06-12 21:33:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.9631828978622328) internal successors, (2495), 842 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2495 transitions. [2021-06-12 21:33:41,631 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2495 transitions. Word has length 28 [2021-06-12 21:33:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:41,631 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2495 transitions. [2021-06-12 21:33:41,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2495 transitions. [2021-06-12 21:33:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:33:41,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:41,634 INFO L472 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] [2021-06-12 21:33:41,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:41,849 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash -121778885, now seen corresponding path program 2 times [2021-06-12 21:33:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:41,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167556045] [2021-06-12 21:33:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167556045] [2021-06-12 21:33:41,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167556045] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:33:41,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:33:41,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:33:41,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512353667] [2021-06-12 21:33:41,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:33:41,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:33:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:41,878 INFO L87 Difference]: Start difference. First operand 843 states and 2495 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:41,888 INFO L93 Difference]: Finished difference Result 713 states and 2082 transitions. [2021-06-12 21:33:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:33:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 21:33:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:41,894 INFO L225 Difference]: With dead ends: 713 [2021-06-12 21:33:41,894 INFO L226 Difference]: Without dead ends: 713 [2021-06-12 21:33:41,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:33:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-12 21:33:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-06-12 21:33:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.9241573033707864) internal successors, (2082), 712 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2082 transitions. [2021-06-12 21:33:41,913 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2082 transitions. Word has length 28 [2021-06-12 21:33:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:41,913 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2082 transitions. [2021-06-12 21:33:41,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2082 transitions. [2021-06-12 21:33:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:33:41,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:41,916 INFO L472 BasicCegarLoop]: trace histogram [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] [2021-06-12 21:33:41,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 21:33:41,917 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash -643643710, now seen corresponding path program 3 times [2021-06-12 21:33:41,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:41,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013671170] [2021-06-12 21:33:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:33:42,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013671170] [2021-06-12 21:33:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013671170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932472831] [2021-06-12 21:33:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:42,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:33:42,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:33:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 21:33:42,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932472831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:42,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:42,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-12 21:33:42,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623068300] [2021-06-12 21:33:42,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:33:42,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:42,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:33:42,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:33:42,365 INFO L87 Difference]: Start difference. First operand 713 states and 2082 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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) [2021-06-12 21:33:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:43,194 INFO L93 Difference]: Finished difference Result 2300 states and 6794 transitions. [2021-06-12 21:33:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:33:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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 35 [2021-06-12 21:33:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:43,204 INFO L225 Difference]: With dead ends: 2300 [2021-06-12 21:33:43,204 INFO L226 Difference]: Without dead ends: 1648 [2021-06-12 21:33:43,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 530.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:33:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-06-12 21:33:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1168. [2021-06-12 21:33:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.942587832047986) internal successors, (3434), 1167 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3434 transitions. [2021-06-12 21:33:43,235 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3434 transitions. Word has length 35 [2021-06-12 21:33:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:43,235 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3434 transitions. [2021-06-12 21:33:43,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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) [2021-06-12 21:33:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3434 transitions. [2021-06-12 21:33:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 21:33:43,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:43,239 INFO L472 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] [2021-06-12 21:33:43,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:43,458 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:43,458 INFO L82 PathProgramCache]: Analyzing trace with hash 407150600, now seen corresponding path program 4 times [2021-06-12 21:33:43,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:43,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052820084] [2021-06-12 21:33:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:33:43,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:43,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052820084] [2021-06-12 21:33:43,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052820084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:43,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082876157] [2021-06-12 21:33:43,504 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 [2021-06-12 21:33:43,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:43,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:43,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:33:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:43,604 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 7 treesize of output 3 [2021-06-12 21:33:43,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:43,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:43,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:43,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-12 21:33:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:33:43,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082876157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:43,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:43,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 21:33:43,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779273701] [2021-06-12 21:33:43,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:33:43,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:33:43,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:33:43,664 INFO L87 Difference]: Start difference. First operand 1168 states and 3434 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:43,692 INFO L93 Difference]: Finished difference Result 2636 states and 7723 transitions. [2021-06-12 21:33:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:33:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-12 21:33:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:43,703 INFO L225 Difference]: With dead ends: 2636 [2021-06-12 21:33:43,703 INFO L226 Difference]: Without dead ends: 2595 [2021-06-12 21:33:43,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:33:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-06-12 21:33:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2203. [2021-06-12 21:33:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 3.022706630336058) internal successors, (6656), 2202 states have internal predecessors, (6656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6656 transitions. [2021-06-12 21:33:43,775 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6656 transitions. Word has length 40 [2021-06-12 21:33:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:43,775 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6656 transitions. [2021-06-12 21:33:43,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6656 transitions. [2021-06-12 21:33:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 21:33:43,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:43,780 INFO L472 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] [2021-06-12 21:33:44,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:44,004 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1457932716, now seen corresponding path program 5 times [2021-06-12 21:33:44,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:44,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347345301] [2021-06-12 21:33:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:33:44,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:44,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347345301] [2021-06-12 21:33:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347345301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559536047] [2021-06-12 21:33:44,076 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:44,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:33:44,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:33:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:44,244 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 7 treesize of output 3 [2021-06-12 21:33:44,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:44,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:44,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:33:44,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-12 21:33:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:33:44,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559536047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:44,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:44,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-12 21:33:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358759324] [2021-06-12 21:33:44,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:33:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:33:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:33:44,312 INFO L87 Difference]: Start difference. First operand 2203 states and 6656 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 21:33:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:44,594 INFO L93 Difference]: Finished difference Result 4689 states and 14236 transitions. [2021-06-12 21:33:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:33:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 40 [2021-06-12 21:33:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:44,608 INFO L225 Difference]: With dead ends: 4689 [2021-06-12 21:33:44,608 INFO L226 Difference]: Without dead ends: 2889 [2021-06-12 21:33:44,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:33:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-06-12 21:33:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2233. [2021-06-12 21:33:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.027329749103943) internal successors, (6757), 2232 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 6757 transitions. [2021-06-12 21:33:44,665 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 6757 transitions. Word has length 40 [2021-06-12 21:33:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:44,665 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 6757 transitions. [2021-06-12 21:33:44,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 21:33:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 6757 transitions. [2021-06-12 21:33:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 21:33:44,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:44,670 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-12 21:33:44,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:44,887 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash -337432434, now seen corresponding path program 6 times [2021-06-12 21:33:44,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:44,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762031091] [2021-06-12 21:33:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:45,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:45,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762031091] [2021-06-12 21:33:45,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762031091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861435406] [2021-06-12 21:33:45,082 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:45,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:33:45,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:45,393 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_1], 1=[v_prenex_3]} [2021-06-12 21:33:45,399 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 [2021-06-12 21:33:45,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:45,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:45,436 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 7 treesize of output 3 [2021-06-12 21:33:45,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:45,499 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-12 21:33:45,505 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:33:45,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 5 [2021-06-12 21:33:45,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:45,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:45,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:33:45,535 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:105, output treesize:63 [2021-06-12 21:33:45,644 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:33:45,644 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 18 treesize of output 10 [2021-06-12 21:33:45,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:45,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:45,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:45,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-12 21:33:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:45,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861435406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:45,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:45,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-06-12 21:33:45,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334123996] [2021-06-12 21:33:45,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:45,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:45,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:45,704 INFO L87 Difference]: Start difference. First operand 2233 states and 6757 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 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) [2021-06-12 21:33:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:52,924 INFO L93 Difference]: Finished difference Result 11042 states and 32715 transitions. [2021-06-12 21:33:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-06-12 21:33:52,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 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 42 [2021-06-12 21:33:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:52,975 INFO L225 Difference]: With dead ends: 11042 [2021-06-12 21:33:52,975 INFO L226 Difference]: Without dead ends: 9556 [2021-06-12 21:33:52,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11392 ImplicationChecksByTransitivity, 5924.1ms TimeCoverageRelationStatistics Valid=3926, Invalid=22806, Unknown=0, NotChecked=0, Total=26732 [2021-06-12 21:33:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-06-12 21:33:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 3753. [2021-06-12 21:33:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.0285181236673773) internal successors, (11363), 3752 states have internal predecessors, (11363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 11363 transitions. [2021-06-12 21:33:53,134 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 11363 transitions. Word has length 42 [2021-06-12 21:33:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:53,134 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 11363 transitions. [2021-06-12 21:33:53,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 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) [2021-06-12 21:33:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 11363 transitions. [2021-06-12 21:33:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 21:33:53,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:53,143 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-12 21:33:53,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 21:33:53,366 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1703826358, now seen corresponding path program 7 times [2021-06-12 21:33:53,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:53,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514163689] [2021-06-12 21:33:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:53,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:53,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514163689] [2021-06-12 21:33:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514163689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:53,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225670637] [2021-06-12 21:33:53,569 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:33:53,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:53,742 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 17 treesize of output 13 [2021-06-12 21:33:53,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:53,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:53,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:53,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-12 21:33:53,973 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_9, q3, v_prenex_12, v_prenex_5], 1=[q1, v_prenex_6], 3=[v_prenex_11]} [2021-06-12 21:33:53,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-12 21:33:53,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 21:33:54,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,082 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 7 treesize of output 5 [2021-06-12 21:33:54,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,133 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 17 treesize of output 9 [2021-06-12 21:33:54,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,182 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:33:54,182 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 24 treesize of output 12 [2021-06-12 21:33:54,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,221 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:33:54,221 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 21 treesize of output 11 [2021-06-12 21:33:54,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 21:33:54,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:33:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 12 [2021-06-12 21:33:54,273 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,304 INFO L628 ElimStorePlain]: treesize reduction 15, result has 74.1 percent of original size [2021-06-12 21:33:54,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 7 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:33:54,305 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 14 variables, input treesize:179, output treesize:43 [2021-06-12 21:33:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:54,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225670637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:54,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:54,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-12 21:33:54,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139912572] [2021-06-12 21:33:54,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:33:54,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:33:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:33:54,501 INFO L87 Difference]: Start difference. First operand 3753 states and 11363 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) [2021-06-12 21:33:56,544 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-12 21:33:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:57,272 INFO L93 Difference]: Finished difference Result 11827 states and 35204 transitions. [2021-06-12 21:33:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 21:33:57,273 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 [2021-06-12 21:33:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:57,299 INFO L225 Difference]: With dead ends: 11827 [2021-06-12 21:33:57,300 INFO L226 Difference]: Without dead ends: 10164 [2021-06-12 21:33:57,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2375.7ms TimeCoverageRelationStatistics Valid=728, Invalid=3694, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:33:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10164 states. [2021-06-12 21:33:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10164 to 3828. [2021-06-12 21:33:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.02874314084139) internal successors, (11591), 3827 states have internal predecessors, (11591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:33:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11591 transitions. [2021-06-12 21:33:57,464 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11591 transitions. Word has length 42 [2021-06-12 21:33:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:57,464 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11591 transitions. [2021-06-12 21:33:57,465 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) [2021-06-12 21:33:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11591 transitions. [2021-06-12 21:33:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 21:33:57,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:57,478 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-12 21:33:57,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:57,693 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1100727138, now seen corresponding path program 8 times [2021-06-12 21:33:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:57,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218485331] [2021-06-12 21:33:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:57,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218485331] [2021-06-12 21:33:57,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218485331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398321110] [2021-06-12 21:33:57,940 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:57,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:33:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:58,191 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_18], 1=[v_prenex_16]} [2021-06-12 21:33:58,194 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 [2021-06-12 21:33:58,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:58,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:58,225 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 7 treesize of output 3 [2021-06-12 21:33:58,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:58,266 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-12 21:33:58,270 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:33:58,270 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 11 treesize of output 5 [2021-06-12 21:33:58,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:58,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:58,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:33:58,288 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:105, output treesize:63 [2021-06-12 21:33:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:58,364 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 18 treesize of output 10 [2021-06-12 21:33:58,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:33:58,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:58,378 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:33:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:33:58,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:58,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:58,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:33:58,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:78, output treesize:31 [2021-06-12 21:33:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:58,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398321110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:58,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:58,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-06-12 21:33:58,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383456971] [2021-06-12 21:33:58,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:58,529 INFO L87 Difference]: Start difference. First operand 3828 states and 11591 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 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) [2021-06-12 21:34:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:08,375 INFO L93 Difference]: Finished difference Result 14066 states and 41923 transitions. [2021-06-12 21:34:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-06-12 21:34:08,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 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 42 [2021-06-12 21:34:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:08,408 INFO L225 Difference]: With dead ends: 14066 [2021-06-12 21:34:08,408 INFO L226 Difference]: Without dead ends: 12367 [2021-06-12 21:34:08,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13054 ImplicationChecksByTransitivity, 8732.3ms TimeCoverageRelationStatistics Valid=4398, Invalid=26402, Unknown=0, NotChecked=0, Total=30800 [2021-06-12 21:34:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12367 states. [2021-06-12 21:34:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12367 to 3970. [2021-06-12 21:34:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3969 states have (on average 3.0330057949105567) internal successors, (12038), 3969 states have internal predecessors, (12038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 12038 transitions. [2021-06-12 21:34:08,561 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 12038 transitions. Word has length 42 [2021-06-12 21:34:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:08,562 INFO L482 AbstractCegarLoop]: Abstraction has 3970 states and 12038 transitions. [2021-06-12 21:34:08,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 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) [2021-06-12 21:34:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 12038 transitions. [2021-06-12 21:34:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 21:34:08,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:08,570 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-12 21:34:08,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:08,794 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:08,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1161843202, now seen corresponding path program 9 times [2021-06-12 21:34:08,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:08,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303671178] [2021-06-12 21:34:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:08,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:08,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303671178] [2021-06-12 21:34:08,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303671178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:08,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478770027] [2021-06-12 21:34:08,974 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 [2021-06-12 21:34:09,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:34:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:34:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:09,229 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_19], 1=[v_prenex_21]} [2021-06-12 21:34:09,232 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 [2021-06-12 21:34:09,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,279 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 7 treesize of output 3 [2021-06-12 21:34:09,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,338 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.0 percent of original size [2021-06-12 21:34:09,343 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:34:09,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 5 [2021-06-12 21:34:09,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:34:09,367 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:117, output treesize:72 [2021-06-12 21:34:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:09,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-06-12 21:34:09,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:09,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:34:09,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,432 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:34:09,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:34:09,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:34:09,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:87, output treesize:40 [2021-06-12 21:34:09,727 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 5 treesize of output 3 [2021-06-12 21:34:09,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:09,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:09,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:34:09,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:09,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:34:09,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:09,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:09,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:34:09,822 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:31 [2021-06-12 21:34:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:09,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478770027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:09,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:09,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-12 21:34:09,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664538738] [2021-06-12 21:34:09,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:34:09,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:09,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:34:09,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:34:09,932 INFO L87 Difference]: Start difference. First operand 3970 states and 12038 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 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) [2021-06-12 21:34:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:18,745 INFO L93 Difference]: Finished difference Result 11155 states and 33205 transitions. [2021-06-12 21:34:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-12 21:34:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 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 42 [2021-06-12 21:34:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:18,765 INFO L225 Difference]: With dead ends: 11155 [2021-06-12 21:34:18,765 INFO L226 Difference]: Without dead ends: 8967 [2021-06-12 21:34:18,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9529 ImplicationChecksByTransitivity, 7732.2ms TimeCoverageRelationStatistics Valid=3798, Invalid=21008, Unknown=0, NotChecked=0, Total=24806 [2021-06-12 21:34:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2021-06-12 21:34:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 3852. [2021-06-12 21:34:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 2.9968839262529214) internal successors, (11541), 3851 states have internal predecessors, (11541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 11541 transitions. [2021-06-12 21:34:18,873 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 11541 transitions. Word has length 42 [2021-06-12 21:34:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:18,874 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 11541 transitions. [2021-06-12 21:34:18,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 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) [2021-06-12 21:34:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 11541 transitions. [2021-06-12 21:34:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 21:34:18,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:18,881 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-12 21:34:19,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 21:34:19,095 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash 610965756, now seen corresponding path program 10 times [2021-06-12 21:34:19,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:19,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32911328] [2021-06-12 21:34:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:19,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32911328] [2021-06-12 21:34:19,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32911328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694029883] [2021-06-12 21:34:19,334 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 [2021-06-12 21:34:19,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:19,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:19,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:34:19,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:19,466 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:34:19,466 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 18 treesize of output 10 [2021-06-12 21:34:19,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:19,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:19,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:19,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-12 21:34:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:34:19,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694029883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:19,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:19,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 22 [2021-06-12 21:34:19,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552258028] [2021-06-12 21:34:19,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:19,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:19,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:19,523 INFO L87 Difference]: Start difference. First operand 3852 states and 11541 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:23,260 INFO L93 Difference]: Finished difference Result 14466 states and 42669 transitions. [2021-06-12 21:34:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-12 21:34:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-12 21:34:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:23,276 INFO L225 Difference]: With dead ends: 14466 [2021-06-12 21:34:23,276 INFO L226 Difference]: Without dead ends: 14073 [2021-06-12 21:34:23,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9648 ImplicationChecksByTransitivity, 2989.8ms TimeCoverageRelationStatistics Valid=2981, Invalid=20581, Unknown=0, NotChecked=0, Total=23562 [2021-06-12 21:34:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2021-06-12 21:34:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 4774. [2021-06-12 21:34:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4774 states, 4773 states have (on average 2.9882673371045465) internal successors, (14263), 4773 states have internal predecessors, (14263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4774 states to 4774 states and 14263 transitions. [2021-06-12 21:34:23,422 INFO L78 Accepts]: Start accepts. Automaton has 4774 states and 14263 transitions. Word has length 44 [2021-06-12 21:34:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:23,423 INFO L482 AbstractCegarLoop]: Abstraction has 4774 states and 14263 transitions. [2021-06-12 21:34:23,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4774 states and 14263 transitions. [2021-06-12 21:34:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 21:34:23,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:23,431 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-06-12 21:34:23,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:34:23,654 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash 893511408, now seen corresponding path program 11 times [2021-06-12 21:34:23,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:23,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288565238] [2021-06-12 21:34:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:23,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:23,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288565238] [2021-06-12 21:34:23,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288565238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:23,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576317992] [2021-06-12 21:34:23,899 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 [2021-06-12 21:34:23,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:34:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:24,131 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:34:24,131 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 18 treesize of output 10 [2021-06-12 21:34:24,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:24,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:24,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:24,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:3 [2021-06-12 21:34:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:34:24,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576317992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:24,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:24,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-06-12 21:34:24,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955540787] [2021-06-12 21:34:24,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:24,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:24,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:24,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:24,177 INFO L87 Difference]: Start difference. First operand 4774 states and 14263 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2021-06-12 21:34:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:30,141 INFO L93 Difference]: Finished difference Result 18190 states and 53987 transitions. [2021-06-12 21:34:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-12 21:34:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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 44 [2021-06-12 21:34:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:30,162 INFO L225 Difference]: With dead ends: 18190 [2021-06-12 21:34:30,162 INFO L226 Difference]: Without dead ends: 15389 [2021-06-12 21:34:30,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13726 ImplicationChecksByTransitivity, 4933.3ms TimeCoverageRelationStatistics Valid=4181, Invalid=28039, Unknown=0, NotChecked=0, Total=32220 [2021-06-12 21:34:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15389 states. [2021-06-12 21:34:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15389 to 5222. [2021-06-12 21:34:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 2.981421183681287) internal successors, (15566), 5221 states have internal predecessors, (15566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 15566 transitions. [2021-06-12 21:34:30,364 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 15566 transitions. Word has length 44 [2021-06-12 21:34:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:30,364 INFO L482 AbstractCegarLoop]: Abstraction has 5222 states and 15566 transitions. [2021-06-12 21:34:30,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2021-06-12 21:34:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 15566 transitions. [2021-06-12 21:34:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:34:30,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:30,374 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:34:30,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 21:34:30,596 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:30,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1369693409, now seen corresponding path program 12 times [2021-06-12 21:34:30,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:30,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257555861] [2021-06-12 21:34:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:34:30,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257555861] [2021-06-12 21:34:30,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257555861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18413347] [2021-06-12 21:34:30,668 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 [2021-06-12 21:34:30,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:34:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:34:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 21:34:30,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:30,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:30,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:30,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 21:34:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:34:30,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18413347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:30,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:30,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-06-12 21:34:30,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090843245] [2021-06-12 21:34:30,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:34:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:34:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:34:30,818 INFO L87 Difference]: Start difference. First operand 5222 states and 15566 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:30,881 INFO L93 Difference]: Finished difference Result 10571 states and 31484 transitions. [2021-06-12 21:34:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:34:30,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-12 21:34:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:30,893 INFO L225 Difference]: With dead ends: 10571 [2021-06-12 21:34:30,893 INFO L226 Difference]: Without dead ends: 10541 [2021-06-12 21:34:30,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:34:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10541 states. [2021-06-12 21:34:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10541 to 8733. [2021-06-12 21:34:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 8732 states have (on average 3.02370590929913) internal successors, (26403), 8732 states have internal predecessors, (26403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 26403 transitions. [2021-06-12 21:34:31,072 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 26403 transitions. Word has length 49 [2021-06-12 21:34:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:31,072 INFO L482 AbstractCegarLoop]: Abstraction has 8733 states and 26403 transitions. [2021-06-12 21:34:31,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 26403 transitions. [2021-06-12 21:34:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:34:31,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:31,088 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:34:31,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 21:34:31,301 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2045512635, now seen corresponding path program 13 times [2021-06-12 21:34:31,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:31,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008715260] [2021-06-12 21:34:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:31,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:31,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008715260] [2021-06-12 21:34:31,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008715260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:31,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085804847] [2021-06-12 21:34:31,493 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 [2021-06-12 21:34:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:34:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:31,635 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:34:31,636 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 22 treesize of output 10 [2021-06-12 21:34:31,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:31,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:31,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:31,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-12 21:34:31,713 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 [2021-06-12 21:34:31,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:31,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:31,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:31,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:34:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:34:31,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085804847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:31,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:31,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-12 21:34:31,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766003610] [2021-06-12 21:34:31,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:31,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:31,762 INFO L87 Difference]: Start difference. First operand 8733 states and 26403 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 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) [2021-06-12 21:34:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:33,631 INFO L93 Difference]: Finished difference Result 23995 states and 72339 transitions. [2021-06-12 21:34:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 21:34:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 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 49 [2021-06-12 21:34:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:33,661 INFO L225 Difference]: With dead ends: 23995 [2021-06-12 21:34:33,661 INFO L226 Difference]: Without dead ends: 22434 [2021-06-12 21:34:33,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 1390.9ms TimeCoverageRelationStatistics Valid=652, Invalid=4750, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 21:34:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22434 states. [2021-06-12 21:34:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22434 to 12965. [2021-06-12 21:34:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12965 states, 12964 states have (on average 3.03139463128664) internal successors, (39299), 12964 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 39299 transitions. [2021-06-12 21:34:33,999 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 39299 transitions. Word has length 49 [2021-06-12 21:34:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:34,000 INFO L482 AbstractCegarLoop]: Abstraction has 12965 states and 39299 transitions. [2021-06-12 21:34:34,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 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) [2021-06-12 21:34:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 39299 transitions. [2021-06-12 21:34:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:34:34,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:34,027 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:34:34,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:34,241 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:34,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:34,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1639678941, now seen corresponding path program 14 times [2021-06-12 21:34:34,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:34,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388418277] [2021-06-12 21:34:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:34,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388418277] [2021-06-12 21:34:34,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388418277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651420624] [2021-06-12 21:34:34,350 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 [2021-06-12 21:34:34,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:34,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:34:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:34,477 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:34:34,478 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 18 treesize of output 10 [2021-06-12 21:34:34,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:34,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:34,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:34,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-12 21:34:34,545 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 [2021-06-12 21:34:34,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:34,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:34,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:34,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:34:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:34:34,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651420624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:34,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:34,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-12 21:34:34,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475299033] [2021-06-12 21:34:34,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:34:34,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:34:34,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:34:34,584 INFO L87 Difference]: Start difference. First operand 12965 states and 39299 transitions. Second operand has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 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) [2021-06-12 21:34:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:37,917 INFO L93 Difference]: Finished difference Result 29303 states and 86448 transitions. [2021-06-12 21:34:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-12 21:34:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 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 49 [2021-06-12 21:34:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:37,962 INFO L225 Difference]: With dead ends: 29303 [2021-06-12 21:34:37,962 INFO L226 Difference]: Without dead ends: 26445 [2021-06-12 21:34:37,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7651 ImplicationChecksByTransitivity, 2250.2ms TimeCoverageRelationStatistics Valid=2807, Invalid=15825, Unknown=0, NotChecked=0, Total=18632 [2021-06-12 21:34:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26445 states. [2021-06-12 21:34:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26445 to 13262. [2021-06-12 21:34:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13261 states have (on average 3.0076163185280147) internal successors, (39884), 13261 states have internal predecessors, (39884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 39884 transitions. [2021-06-12 21:34:38,254 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 39884 transitions. Word has length 49 [2021-06-12 21:34:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:38,254 INFO L482 AbstractCegarLoop]: Abstraction has 13262 states and 39884 transitions. [2021-06-12 21:34:38,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 21 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) [2021-06-12 21:34:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 39884 transitions. [2021-06-12 21:34:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:34:38,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:38,277 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:34:38,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 21:34:38,501 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1094414023, now seen corresponding path program 15 times [2021-06-12 21:34:38,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:38,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97414319] [2021-06-12 21:34:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:38,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:38,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97414319] [2021-06-12 21:34:38,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97414319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:38,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722626357] [2021-06-12 21:34:38,686 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 [2021-06-12 21:34:38,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:34:38,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:34:38,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:38,849 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:34:38,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:34:38,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:38,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:38,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:38,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-12 21:34:38,919 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 [2021-06-12 21:34:38,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:38,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:38,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:38,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-12 21:34:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:38,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722626357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:38,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:38,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-06-12 21:34:38,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830425813] [2021-06-12 21:34:38,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:34:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:38,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:34:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:34:38,965 INFO L87 Difference]: Start difference. First operand 13262 states and 39884 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 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) [2021-06-12 21:34:39,631 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-12 21:34:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:45,243 INFO L93 Difference]: Finished difference Result 35518 states and 106381 transitions. [2021-06-12 21:34:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-12 21:34:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 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 49 [2021-06-12 21:34:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:45,289 INFO L225 Difference]: With dead ends: 35518 [2021-06-12 21:34:45,289 INFO L226 Difference]: Without dead ends: 33568 [2021-06-12 21:34:45,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13705 ImplicationChecksByTransitivity, 4738.2ms TimeCoverageRelationStatistics Valid=4855, Invalid=29555, Unknown=0, NotChecked=0, Total=34410 [2021-06-12 21:34:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33568 states. [2021-06-12 21:34:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33568 to 17682. [2021-06-12 21:34:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 3.0209264181890165) internal successors, (53413), 17681 states have internal predecessors, (53413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 53413 transitions. [2021-06-12 21:34:45,599 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 53413 transitions. Word has length 49 [2021-06-12 21:34:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:45,599 INFO L482 AbstractCegarLoop]: Abstraction has 17682 states and 53413 transitions. [2021-06-12 21:34:45,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 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) [2021-06-12 21:34:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 53413 transitions. [2021-06-12 21:34:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:34:45,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:45,729 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:34:45,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:45,929 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:45,930 INFO L82 PathProgramCache]: Analyzing trace with hash -857147075, now seen corresponding path program 16 times [2021-06-12 21:34:45,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:45,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378079279] [2021-06-12 21:34:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:46,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:46,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378079279] [2021-06-12 21:34:46,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378079279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:46,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260267149] [2021-06-12 21:34:46,192 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 [2021-06-12 21:34:46,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:46,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 21:34:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:46,411 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 21 treesize of output 13 [2021-06-12 21:34:46,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:46,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:33 [2021-06-12 21:34:46,707 INFO L446 ElimStorePlain]: Different costs {0=[q3], 1=[v_prenex_28], 3=[q1, v_prenex_27]} [2021-06-12 21:34:46,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 21:34:46,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:46,762 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 21 treesize of output 13 [2021-06-12 21:34:46,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,769 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:34:46,770 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 15 [2021-06-12 21:34:46,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:46,819 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:34:46,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-06-12 21:34:46,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:46,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:46,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:46,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 21:34:46,854 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,858 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:34:46,858 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 15 treesize of output 7 [2021-06-12 21:34:46,859 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:46,884 INFO L628 ElimStorePlain]: treesize reduction 12, result has 71.4 percent of original size [2021-06-12 21:34:46,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:34:46,885 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:146, output treesize:28 [2021-06-12 21:34:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:46,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260267149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:46,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:46,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-12 21:34:46,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87922658] [2021-06-12 21:34:46,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:34:46,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:46,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:34:46,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:34:46,941 INFO L87 Difference]: Start difference. First operand 17682 states and 53413 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:49,969 INFO L93 Difference]: Finished difference Result 32635 states and 97607 transitions. [2021-06-12 21:34:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 21:34:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-12 21:34:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:50,015 INFO L225 Difference]: With dead ends: 32635 [2021-06-12 21:34:50,015 INFO L226 Difference]: Without dead ends: 29107 [2021-06-12 21:34:50,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2491.3ms TimeCoverageRelationStatistics Valid=817, Invalid=6323, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 21:34:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29107 states. [2021-06-12 21:34:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29107 to 19560. [2021-06-12 21:34:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19560 states, 19559 states have (on average 3.0155427169078175) internal successors, (58981), 19559 states have internal predecessors, (58981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 58981 transitions. [2021-06-12 21:34:50,356 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 58981 transitions. Word has length 49 [2021-06-12 21:34:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:50,356 INFO L482 AbstractCegarLoop]: Abstraction has 19560 states and 58981 transitions. [2021-06-12 21:34:50,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 58981 transitions. [2021-06-12 21:34:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:34:50,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:50,381 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:34:50,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 21:34:50,594 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:50,594 INFO L82 PathProgramCache]: Analyzing trace with hash 939243943, now seen corresponding path program 17 times [2021-06-12 21:34:50,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:50,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176979745] [2021-06-12 21:34:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:50,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:50,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176979745] [2021-06-12 21:34:50,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176979745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:50,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370367472] [2021-06-12 21:34:50,814 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:50,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:34:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:34:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:50,970 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:34:50,971 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 18 treesize of output 10 [2021-06-12 21:34:50,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:50,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:50,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:50,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-12 21:34:51,043 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 [2021-06-12 21:34:51,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:51,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:51,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:51,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:34:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:51,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370367472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:51,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:51,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-06-12 21:34:51,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767769167] [2021-06-12 21:34:51,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:34:51,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:51,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:34:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:34:51,092 INFO L87 Difference]: Start difference. First operand 19560 states and 58981 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 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) [2021-06-12 21:34:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:54,728 INFO L93 Difference]: Finished difference Result 49644 states and 149422 transitions. [2021-06-12 21:34:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 21:34:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 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 49 [2021-06-12 21:34:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:54,795 INFO L225 Difference]: With dead ends: 49644 [2021-06-12 21:34:54,795 INFO L226 Difference]: Without dead ends: 46702 [2021-06-12 21:34:54,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 2615.3ms TimeCoverageRelationStatistics Valid=2056, Invalid=10826, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 21:34:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46702 states. [2021-06-12 21:34:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46702 to 28803. [2021-06-12 21:34:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28803 states, 28802 states have (on average 3.0261440177765433) internal successors, (87159), 28802 states have internal predecessors, (87159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:34:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28803 states to 28803 states and 87159 transitions. [2021-06-12 21:34:55,305 INFO L78 Accepts]: Start accepts. Automaton has 28803 states and 87159 transitions. Word has length 49 [2021-06-12 21:34:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:55,305 INFO L482 AbstractCegarLoop]: Abstraction has 28803 states and 87159 transitions. [2021-06-12 21:34:55,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 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) [2021-06-12 21:34:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 28803 states and 87159 transitions. [2021-06-12 21:34:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:34:55,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:55,505 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:34:55,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:55,729 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1482469265, now seen corresponding path program 18 times [2021-06-12 21:34:55,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:55,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522648546] [2021-06-12 21:34:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:34:56,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522648546] [2021-06-12 21:34:56,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522648546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256346762] [2021-06-12 21:34:56,039 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:56,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:34:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:34:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:56,491 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 7 treesize of output 3 [2021-06-12 21:34:56,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:56,553 INFO L628 ElimStorePlain]: treesize reduction 34, result has 68.2 percent of original size [2021-06-12 21:34:56,554 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-12 21:34:56,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:34:56,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:114, output treesize:71 [2021-06-12 21:34:56,660 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:34:56,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:34:56,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:56,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:56,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:56,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-12 21:34:56,726 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 [2021-06-12 21:34:56,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:56,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:56,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:56,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:34:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:34:56,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256346762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:56,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:56,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-06-12 21:34:56,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409122990] [2021-06-12 21:34:56,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:34:56,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:56,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:34:56,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:34:56,777 INFO L87 Difference]: Start difference. First operand 28803 states and 87159 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 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) [2021-06-12 21:35:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:02,596 INFO L93 Difference]: Finished difference Result 62509 states and 189125 transitions. [2021-06-12 21:35:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-12 21:35:02,597 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 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 49 [2021-06-12 21:35:02,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:02,692 INFO L225 Difference]: With dead ends: 62509 [2021-06-12 21:35:02,692 INFO L226 Difference]: Without dead ends: 55884 [2021-06-12 21:35:02,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 4513.1ms TimeCoverageRelationStatistics Valid=2397, Invalid=13605, Unknown=0, NotChecked=0, Total=16002 [2021-06-12 21:35:02,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55884 states. [2021-06-12 21:35:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55884 to 36502. [2021-06-12 21:35:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36502 states, 36501 states have (on average 3.0240541355031367) internal successors, (110381), 36501 states have internal predecessors, (110381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36502 states to 36502 states and 110381 transitions. [2021-06-12 21:35:03,541 INFO L78 Accepts]: Start accepts. Automaton has 36502 states and 110381 transitions. Word has length 49 [2021-06-12 21:35:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:03,541 INFO L482 AbstractCegarLoop]: Abstraction has 36502 states and 110381 transitions. [2021-06-12 21:35:03,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 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) [2021-06-12 21:35:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 36502 states and 110381 transitions. [2021-06-12 21:35:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:35:03,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:03,582 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:35:03,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 21:35:03,785 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:03,785 INFO L82 PathProgramCache]: Analyzing trace with hash -742740465, now seen corresponding path program 19 times [2021-06-12 21:35:03,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:03,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533040550] [2021-06-12 21:35:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:04,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533040550] [2021-06-12 21:35:04,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533040550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425203520] [2021-06-12 21:35:04,137 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 21:35:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:04,271 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 21 treesize of output 13 [2021-06-12 21:35:04,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:04,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:26 [2021-06-12 21:35:04,530 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_40], 1=[v_prenex_34, v_prenex_33], 3=[q1, v_prenex_39]} [2021-06-12 21:35:04,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 21:35:04,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:04,578 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 21 treesize of output 13 [2021-06-12 21:35:04,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,687 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 21:35:04,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:04,693 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:35:04,694 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 15 [2021-06-12 21:35:04,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:04,729 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:35:04,729 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 15 treesize of output 7 [2021-06-12 21:35:04,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:04,766 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:35:04,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2021-06-12 21:35:04,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:04,793 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:35:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 21:35:04,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:04,820 INFO L628 ElimStorePlain]: treesize reduction 12, result has 73.9 percent of original size [2021-06-12 21:35:04,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:35:04,826 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:150, output treesize:32 [2021-06-12 21:35:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:35:04,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425203520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:04,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:04,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-06-12 21:35:04,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036039053] [2021-06-12 21:35:04,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:35:04,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:04,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:35:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:35:04,876 INFO L87 Difference]: Start difference. First operand 36502 states and 110381 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 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) [2021-06-12 21:35:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:07,195 INFO L93 Difference]: Finished difference Result 48359 states and 145089 transitions. [2021-06-12 21:35:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:35:07,195 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 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 49 [2021-06-12 21:35:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:07,276 INFO L225 Difference]: With dead ends: 48359 [2021-06-12 21:35:07,276 INFO L226 Difference]: Without dead ends: 46710 [2021-06-12 21:35:07,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1812.4ms TimeCoverageRelationStatistics Valid=565, Invalid=3341, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:35:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46710 states. [2021-06-12 21:35:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46710 to 36654. [2021-06-12 21:35:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36654 states, 36653 states have (on average 3.0235178566556624) internal successors, (110821), 36653 states have internal predecessors, (110821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36654 states to 36654 states and 110821 transitions. [2021-06-12 21:35:08,120 INFO L78 Accepts]: Start accepts. Automaton has 36654 states and 110821 transitions. Word has length 49 [2021-06-12 21:35:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:08,120 INFO L482 AbstractCegarLoop]: Abstraction has 36654 states and 110821 transitions. [2021-06-12 21:35:08,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 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) [2021-06-12 21:35:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 36654 states and 110821 transitions. [2021-06-12 21:35:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:35:08,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:08,160 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:35:08,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-12 21:35:08,361 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash -549490785, now seen corresponding path program 20 times [2021-06-12 21:35:08,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:08,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718126850] [2021-06-12 21:35:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:35:08,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:08,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718126850] [2021-06-12 21:35:08,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718126850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:08,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363087440] [2021-06-12 21:35:08,469 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:08,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:35:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:08,613 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:35:08,614 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 18 treesize of output 10 [2021-06-12 21:35:08,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:08,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:08,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:08,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:9 [2021-06-12 21:35:08,664 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 [2021-06-12 21:35:08,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:08,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:08,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:08,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:35:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:08,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363087440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:08,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:08,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-12 21:35:08,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8288593] [2021-06-12 21:35:08,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:35:08,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:08,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:35:08,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:35:08,706 INFO L87 Difference]: Start difference. First operand 36654 states and 110821 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 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) [2021-06-12 21:35:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:11,406 INFO L93 Difference]: Finished difference Result 103049 states and 309241 transitions. [2021-06-12 21:35:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 21:35:11,406 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 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 51 [2021-06-12 21:35:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:11,604 INFO L225 Difference]: With dead ends: 103049 [2021-06-12 21:35:11,604 INFO L226 Difference]: Without dead ends: 102356 [2021-06-12 21:35:11,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4810 ImplicationChecksByTransitivity, 1794.4ms TimeCoverageRelationStatistics Valid=2216, Invalid=10216, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 21:35:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102356 states. [2021-06-12 21:35:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102356 to 42498. [2021-06-12 21:35:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42498 states, 42497 states have (on average 3.0068946043250113) internal successors, (127784), 42497 states have internal predecessors, (127784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42498 states to 42498 states and 127784 transitions. [2021-06-12 21:35:13,149 INFO L78 Accepts]: Start accepts. Automaton has 42498 states and 127784 transitions. Word has length 51 [2021-06-12 21:35:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:13,149 INFO L482 AbstractCegarLoop]: Abstraction has 42498 states and 127784 transitions. [2021-06-12 21:35:13,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 21 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) [2021-06-12 21:35:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 42498 states and 127784 transitions. [2021-06-12 21:35:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 21:35:13,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:13,202 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:35:13,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:13,403 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1690828025, now seen corresponding path program 21 times [2021-06-12 21:35:13,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:13,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123988214] [2021-06-12 21:35:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:13,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:13,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123988214] [2021-06-12 21:35:13,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123988214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:13,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854404434] [2021-06-12 21:35:13,624 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:13,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:35:13,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:35:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:14,090 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_43, v_prenex_45], 1=[q3]} [2021-06-12 21:35:14,093 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 7 treesize of output 3 [2021-06-12 21:35:14,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:14,154 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.4 percent of original size [2021-06-12 21:35:14,155 INFO L518 ElimStorePlain]: Eliminatee v_prenex_45 vanished before elimination [2021-06-12 21:35:14,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:35:14,159 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 11 treesize of output 5 [2021-06-12 21:35:14,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:14,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:14,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:35:14,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:133, output treesize:84 [2021-06-12 21:35:14,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:35:14,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:14,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:14,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:35:14,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:14,280 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:35:14,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:35:14,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:14,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:14,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:35:14,295 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:99, output treesize:31 [2021-06-12 21:35:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:14,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854404434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:14,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:14,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-06-12 21:35:14,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775391404] [2021-06-12 21:35:14,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:35:14,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:35:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:35:14,411 INFO L87 Difference]: Start difference. First operand 42498 states and 127784 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:25,854 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-12 21:35:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:29,649 INFO L93 Difference]: Finished difference Result 63536 states and 189082 transitions. [2021-06-12 21:35:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-06-12 21:35:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 [2021-06-12 21:35:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:29,741 INFO L225 Difference]: With dead ends: 63536 [2021-06-12 21:35:29,741 INFO L226 Difference]: Without dead ends: 62627 [2021-06-12 21:35:29,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25551 ImplicationChecksByTransitivity, 13204.4ms TimeCoverageRelationStatistics Valid=6397, Invalid=54859, Unknown=0, NotChecked=0, Total=61256 [2021-06-12 21:35:29,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62627 states. [2021-06-12 21:35:30,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62627 to 43408. [2021-06-12 21:35:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43408 states, 43407 states have (on average 3.008708272859216) internal successors, (130599), 43407 states have internal predecessors, (130599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43408 states to 43408 states and 130599 transitions. [2021-06-12 21:35:30,506 INFO L78 Accepts]: Start accepts. Automaton has 43408 states and 130599 transitions. Word has length 54 [2021-06-12 21:35:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:30,506 INFO L482 AbstractCegarLoop]: Abstraction has 43408 states and 130599 transitions. [2021-06-12 21:35:30,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 43408 states and 130599 transitions. [2021-06-12 21:35:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 21:35:30,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:30,562 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:35:30,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-12 21:35:30,763 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:30,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1977773629, now seen corresponding path program 22 times [2021-06-12 21:35:30,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:30,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246344271] [2021-06-12 21:35:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:30,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246344271] [2021-06-12 21:35:30,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246344271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:30,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286127356] [2021-06-12 21:35:30,953 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 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 [2021-06-12 21:35:30,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:35:30,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 21:35:31,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:31,502 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-12 21:35:31,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:31,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:31,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-12 21:35:31,776 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_48], 1=[q3], 3=[q1, v_prenex_47]} [2021-06-12 21:35:31,780 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 21 treesize of output 13 [2021-06-12 21:35:31,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:32,004 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-12 21:35:32,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:32,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,009 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 27 treesize of output 15 [2021-06-12 21:35:32,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:32,013 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 21 treesize of output 13 [2021-06-12 21:35:32,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:32,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:32,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 21:35:32,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:32,059 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:35:32,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 21:35:32,061 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:32,090 INFO L628 ElimStorePlain]: treesize reduction 37, result has 44.8 percent of original size [2021-06-12 21:35:32,090 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-06-12 21:35:32,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:35:32,091 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:152, output treesize:28 [2021-06-12 21:35:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:32,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286127356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:32,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:32,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:35:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785553948] [2021-06-12 21:35:32,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:35:32,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:35:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:35:32,154 INFO L87 Difference]: Start difference. First operand 43408 states and 130599 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 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) [2021-06-12 21:35:37,382 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-12 21:35:37,967 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-12 21:35:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:38,845 INFO L93 Difference]: Finished difference Result 57791 states and 173149 transitions. [2021-06-12 21:35:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-12 21:35:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 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 [2021-06-12 21:35:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:38,934 INFO L225 Difference]: With dead ends: 57791 [2021-06-12 21:35:38,934 INFO L226 Difference]: Without dead ends: 55664 [2021-06-12 21:35:38,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8232 ImplicationChecksByTransitivity, 5407.4ms TimeCoverageRelationStatistics Valid=2289, Invalid=19173, Unknown=0, NotChecked=0, Total=21462 [2021-06-12 21:35:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55664 states. [2021-06-12 21:35:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55664 to 42854. [2021-06-12 21:35:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42854 states, 42853 states have (on average 3.0055772057965604) internal successors, (128798), 42853 states have internal predecessors, (128798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42854 states to 42854 states and 128798 transitions. [2021-06-12 21:35:39,660 INFO L78 Accepts]: Start accepts. Automaton has 42854 states and 128798 transitions. Word has length 54 [2021-06-12 21:35:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:39,660 INFO L482 AbstractCegarLoop]: Abstraction has 42854 states and 128798 transitions. [2021-06-12 21:35:39,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 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) [2021-06-12 21:35:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 42854 states and 128798 transitions. [2021-06-12 21:35:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 21:35:39,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:39,710 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:35:39,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 21:35:39,911 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1049833869, now seen corresponding path program 23 times [2021-06-12 21:35:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:39,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186507078] [2021-06-12 21:35:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:40,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:40,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186507078] [2021-06-12 21:35:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186507078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:40,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882226571] [2021-06-12 21:35:40,011 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:40,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:35:40,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:40,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:35:40,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:35:40,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882226571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:40,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:40,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-12 21:35:40,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073882703] [2021-06-12 21:35:40,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:35:40,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:40,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:35:40,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:35:40,442 INFO L87 Difference]: Start difference. First operand 42854 states and 128798 transitions. Second operand has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 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) [2021-06-12 21:35:41,120 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-12 21:35:41,651 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-12 21:35:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:41,997 INFO L93 Difference]: Finished difference Result 74433 states and 223524 transitions. [2021-06-12 21:35:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:35:42,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 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 [2021-06-12 21:35:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:42,223 INFO L225 Difference]: With dead ends: 74433 [2021-06-12 21:35:42,223 INFO L226 Difference]: Without dead ends: 73438 [2021-06-12 21:35:42,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1353.7ms TimeCoverageRelationStatistics Valid=493, Invalid=1763, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:35:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73438 states. [2021-06-12 21:35:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73438 to 51632. [2021-06-12 21:35:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51632 states, 51631 states have (on average 3.0211307160426877) internal successors, (155984), 51631 states have internal predecessors, (155984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51632 states to 51632 states and 155984 transitions. [2021-06-12 21:35:43,301 INFO L78 Accepts]: Start accepts. Automaton has 51632 states and 155984 transitions. Word has length 54 [2021-06-12 21:35:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:43,301 INFO L482 AbstractCegarLoop]: Abstraction has 51632 states and 155984 transitions. [2021-06-12 21:35:43,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 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) [2021-06-12 21:35:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 51632 states and 155984 transitions. [2021-06-12 21:35:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 21:35:43,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:43,369 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:35:43,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:43,573 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:43,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1128532211, now seen corresponding path program 24 times [2021-06-12 21:35:43,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:43,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414494167] [2021-06-12 21:35:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:44,080 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-12 21:35:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:44,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:44,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414494167] [2021-06-12 21:35:44,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414494167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:44,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342052238] [2021-06-12 21:35:44,123 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:44,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:35:44,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:44,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 21:35:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:44,260 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 17 treesize of output 13 [2021-06-12 21:35:44,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:44,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:44,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:44,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-12 21:35:44,911 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_53, v_prenex_55], 1=[v_prenex_51]} [2021-06-12 21:35:44,915 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 24 treesize of output 18 [2021-06-12 21:35:44,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:44,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:44,978 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 19 treesize of output 15 [2021-06-12 21:35:44,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:45,079 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-12 21:35:45,080 INFO L628 ElimStorePlain]: treesize reduction 7, result has 96.5 percent of original size [2021-06-12 21:35:45,084 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 30 treesize of output 18 [2021-06-12 21:35:45,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:45,168 INFO L628 ElimStorePlain]: treesize reduction 40, result has 77.7 percent of original size [2021-06-12 21:35:45,173 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:35:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 20 [2021-06-12 21:35:45,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:45,237 INFO L628 ElimStorePlain]: treesize reduction 7, result has 93.8 percent of original size [2021-06-12 21:35:45,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:35:45,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:221, output treesize:102 [2021-06-12 21:35:45,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:35:45,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:45,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:35:45,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:45,343 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:35:45,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-12 21:35:45,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:45,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:45,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:35:45,367 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:117, output treesize:43 [2021-06-12 21:35:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:45,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342052238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:45,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:45,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-12 21:35:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333497575] [2021-06-12 21:35:45,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:35:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:35:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:35:45,530 INFO L87 Difference]: Start difference. First operand 51632 states and 155984 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 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) [2021-06-12 21:35:46,794 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-12 21:35:47,087 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-12 21:35:47,294 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2021-06-12 21:35:47,428 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-12 21:35:47,649 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-06-12 21:35:47,979 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-06-12 21:35:48,332 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2021-06-12 21:35:48,795 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-12 21:35:49,257 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2021-06-12 21:35:49,414 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-06-12 21:35:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:51,971 INFO L93 Difference]: Finished difference Result 61707 states and 185313 transitions. [2021-06-12 21:35:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-12 21:35:51,971 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 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 [2021-06-12 21:35:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:52,071 INFO L225 Difference]: With dead ends: 61707 [2021-06-12 21:35:52,072 INFO L226 Difference]: Without dead ends: 60214 [2021-06-12 21:35:52,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 6227.6ms TimeCoverageRelationStatistics Valid=1318, Invalid=9188, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 21:35:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60214 states. [2021-06-12 21:35:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60214 to 51802. [2021-06-12 21:35:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51802 states, 51801 states have (on average 3.0208297137120903) internal successors, (156482), 51801 states have internal predecessors, (156482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51802 states to 51802 states and 156482 transitions. [2021-06-12 21:35:52,959 INFO L78 Accepts]: Start accepts. Automaton has 51802 states and 156482 transitions. Word has length 54 [2021-06-12 21:35:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:52,960 INFO L482 AbstractCegarLoop]: Abstraction has 51802 states and 156482 transitions. [2021-06-12 21:35:52,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 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) [2021-06-12 21:35:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 51802 states and 156482 transitions. [2021-06-12 21:35:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 21:35:53,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:53,466 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-06-12 21:35:53,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-12 21:35:53,667 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1974397899, now seen corresponding path program 25 times [2021-06-12 21:35:53,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:53,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542523875] [2021-06-12 21:35:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:35:54,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:54,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542523875] [2021-06-12 21:35:54,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542523875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:54,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947053496] [2021-06-12 21:35:54,062 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 21:35:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:54,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:35:54,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:54,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:54,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:54,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-06-12 21:35:54,777 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-12 21:35:55,212 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_58], 1=[q3], 3=[q1, v_prenex_57]} [2021-06-12 21:35:55,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 21:35:55,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:55,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,263 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 21 treesize of output 13 [2021-06-12 21:35:55,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:55,270 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:35:55,270 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 25 treesize of output 15 [2021-06-12 21:35:55,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:55,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,311 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 15 treesize of output 7 [2021-06-12 21:35:55,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:55,318 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:35:55,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 21:35:55,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:55,348 INFO L628 ElimStorePlain]: treesize reduction 37, result has 44.8 percent of original size [2021-06-12 21:35:55,348 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-06-12 21:35:55,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:35:55,349 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:146, output treesize:28 [2021-06-12 21:35:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:35:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947053496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:55,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:55,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 21:35:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711505601] [2021-06-12 21:35:55,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:35:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:35:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:35:55,435 INFO L87 Difference]: Start difference. First operand 51802 states and 156482 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 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) [2021-06-12 21:35:56,667 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 21:35:57,451 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-06-12 21:35:57,618 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-12 21:35:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:58,972 INFO L93 Difference]: Finished difference Result 67435 states and 201565 transitions. [2021-06-12 21:35:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 21:35:58,973 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 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 [2021-06-12 21:35:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:59,072 INFO L225 Difference]: With dead ends: 67435 [2021-06-12 21:35:59,072 INFO L226 Difference]: Without dead ends: 65786 [2021-06-12 21:35:59,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 3420.0ms TimeCoverageRelationStatistics Valid=789, Invalid=4613, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 21:35:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65786 states. [2021-06-12 21:35:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65786 to 51838. [2021-06-12 21:35:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51838 states, 51837 states have (on average 3.020603044157648) internal successors, (156579), 51837 states have internal predecessors, (156579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:59,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51838 states to 51838 states and 156579 transitions. [2021-06-12 21:35:59,959 INFO L78 Accepts]: Start accepts. Automaton has 51838 states and 156579 transitions. Word has length 54 [2021-06-12 21:35:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:59,959 INFO L482 AbstractCegarLoop]: Abstraction has 51838 states and 156579 transitions. [2021-06-12 21:35:59,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 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) [2021-06-12 21:35:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51838 states and 156579 transitions. [2021-06-12 21:36:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:36:00,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:00,034 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:36:00,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:00,235 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1518754715, now seen corresponding path program 26 times [2021-06-12 21:36:00,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:00,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564528372] [2021-06-12 21:36:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:36:00,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564528372] [2021-06-12 21:36:00,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564528372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019860290] [2021-06-12 21:36:00,459 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:00,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:36:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:00,657 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 21 treesize of output 13 [2021-06-12 21:36:00,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:00,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:00,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:00,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:40 [2021-06-12 21:36:00,929 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-12 21:36:01,294 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_65], 1=[v_prenex_63], 3=[v_prenex_61], 6=[q1, v_prenex_67]} [2021-06-12 21:36:01,298 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 24 treesize of output 18 [2021-06-12 21:36:01,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:01,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:01,349 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 30 treesize of output 18 [2021-06-12 21:36:01,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:01,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:01,395 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:36:01,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 20 [2021-06-12 21:36:01,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:01,468 INFO L628 ElimStorePlain]: treesize reduction 7, result has 95.2 percent of original size [2021-06-12 21:36:01,473 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:36:01,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:36:01,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:01,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:01,509 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-12 21:36:01,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2021-06-12 21:36:01,510 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:01,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:01,538 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:36:01,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:36:01,670 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:01,703 INFO L628 ElimStorePlain]: treesize reduction 15, result has 71.2 percent of original size [2021-06-12 21:36:01,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:36:01,705 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:196, output treesize:37 [2021-06-12 21:36:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-12 21:36:01,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019860290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:01,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:01,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 21:36:01,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364955162] [2021-06-12 21:36:01,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:01,779 INFO L87 Difference]: Start difference. First operand 51838 states and 156579 transitions. Second operand has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 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) [2021-06-12 21:36:04,873 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-12 21:36:05,223 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 21:36:05,368 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-12 21:36:05,631 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-12 21:36:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:07,750 INFO L93 Difference]: Finished difference Result 63014 states and 189832 transitions. [2021-06-12 21:36:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-12 21:36:07,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 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 56 [2021-06-12 21:36:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:07,852 INFO L225 Difference]: With dead ends: 63014 [2021-06-12 21:36:07,853 INFO L226 Difference]: Without dead ends: 62505 [2021-06-12 21:36:07,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 4843.3ms TimeCoverageRelationStatistics Valid=1257, Invalid=11175, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 21:36:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62505 states. [2021-06-12 21:36:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62505 to 52176. [2021-06-12 21:36:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52176 states, 52175 states have (on average 3.020776233828462) internal successors, (157609), 52175 states have internal predecessors, (157609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52176 states to 52176 states and 157609 transitions. [2021-06-12 21:36:08,881 INFO L78 Accepts]: Start accepts. Automaton has 52176 states and 157609 transitions. Word has length 56 [2021-06-12 21:36:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:08,881 INFO L482 AbstractCegarLoop]: Abstraction has 52176 states and 157609 transitions. [2021-06-12 21:36:08,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 27 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) [2021-06-12 21:36:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 52176 states and 157609 transitions. [2021-06-12 21:36:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:36:08,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:08,960 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:36:09,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:09,161 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 384167611, now seen corresponding path program 27 times [2021-06-12 21:36:09,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:09,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339568647] [2021-06-12 21:36:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:36:09,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339568647] [2021-06-12 21:36:09,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339568647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097690016] [2021-06-12 21:36:09,354 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:09,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 21:36:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:36:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:09,768 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:36:09,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 21:36:09,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:09,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:09,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:09,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-12 21:36:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:36:09,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097690016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:09,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:09,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2021-06-12 21:36:09,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190385219] [2021-06-12 21:36:09,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:36:09,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:09,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:36:09,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:36:09,811 INFO L87 Difference]: Start difference. First operand 52176 states and 157609 transitions. Second operand has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:17,741 INFO L93 Difference]: Finished difference Result 158134 states and 474113 transitions. [2021-06-12 21:36:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-06-12 21:36:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:36:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:18,005 INFO L225 Difference]: With dead ends: 158134 [2021-06-12 21:36:18,005 INFO L226 Difference]: Without dead ends: 156093 [2021-06-12 21:36:18,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18881 ImplicationChecksByTransitivity, 6459.1ms TimeCoverageRelationStatistics Valid=6475, Invalid=37415, Unknown=0, NotChecked=0, Total=43890 [2021-06-12 21:36:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156093 states. [2021-06-12 21:36:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156093 to 72800. [2021-06-12 21:36:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72800 states, 72799 states have (on average 3.02181348644899) internal successors, (219985), 72799 states have internal predecessors, (219985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72800 states to 72800 states and 219985 transitions. [2021-06-12 21:36:20,153 INFO L78 Accepts]: Start accepts. Automaton has 72800 states and 219985 transitions. Word has length 56 [2021-06-12 21:36:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:20,154 INFO L482 AbstractCegarLoop]: Abstraction has 72800 states and 219985 transitions. [2021-06-12 21:36:20,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 72800 states and 219985 transitions. [2021-06-12 21:36:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:36:20,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:20,246 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:36:20,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:20,447 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1255614645, now seen corresponding path program 28 times [2021-06-12 21:36:20,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:20,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250093083] [2021-06-12 21:36:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:36:20,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:20,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250093083] [2021-06-12 21:36:20,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250093083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:20,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144876249] [2021-06-12 21:36:20,607 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:20,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:20,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:20,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:36:20,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:21,071 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 21 treesize of output 13 [2021-06-12 21:36:21,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:21,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:21,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:21,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:43 [2021-06-12 21:36:21,344 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_72], 1=[q3], 6=[q1, v_prenex_71]} [2021-06-12 21:36:21,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 21:36:21,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:21,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:21,398 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 21 treesize of output 13 [2021-06-12 21:36:21,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:21,404 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:36:21,404 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 15 [2021-06-12 21:36:21,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:21,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:21,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:36:21,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:21,460 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:36:21,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:36:21,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:21,491 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-12 21:36:21,491 INFO L518 ElimStorePlain]: Eliminatee v_prenex_71 vanished before elimination [2021-06-12 21:36:21,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:36:21,492 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-12 21:36:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:36:21,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144876249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:21,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:21,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 21:36:21,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247868327] [2021-06-12 21:36:21,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:36:21,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:36:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:36:21,555 INFO L87 Difference]: Start difference. First operand 72800 states and 219985 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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) [2021-06-12 21:36:25,400 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-06-12 21:36:25,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:25,509 INFO L93 Difference]: Finished difference Result 113403 states and 342039 transitions. [2021-06-12 21:36:25,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 21:36:25,510 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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 56 [2021-06-12 21:36:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:25,684 INFO L225 Difference]: With dead ends: 113403 [2021-06-12 21:36:25,685 INFO L226 Difference]: Without dead ends: 110881 [2021-06-12 21:36:25,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3469 ImplicationChecksByTransitivity, 2826.0ms TimeCoverageRelationStatistics Valid=1029, Invalid=9071, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 21:36:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110881 states. [2021-06-12 21:36:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110881 to 72688. [2021-06-12 21:36:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72688 states, 72687 states have (on average 3.0223974025616687) internal successors, (219689), 72687 states have internal predecessors, (219689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72688 states to 72688 states and 219689 transitions. [2021-06-12 21:36:27,358 INFO L78 Accepts]: Start accepts. Automaton has 72688 states and 219689 transitions. Word has length 56 [2021-06-12 21:36:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:27,358 INFO L482 AbstractCegarLoop]: Abstraction has 72688 states and 219689 transitions. [2021-06-12 21:36:27,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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) [2021-06-12 21:36:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 72688 states and 219689 transitions. [2021-06-12 21:36:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:36:27,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:27,456 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:36:27,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:27,665 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1957956279, now seen corresponding path program 29 times [2021-06-12 21:36:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079632304] [2021-06-12 21:36:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:36:27,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:27,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079632304] [2021-06-12 21:36:27,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079632304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:27,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182607652] [2021-06-12 21:36:27,823 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:27,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:36:27,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:36:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:28,424 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:36:28,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:36:28,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:28,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:28,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:28,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:36:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:36:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182607652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:28,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:28,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-06-12 21:36:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503522415] [2021-06-12 21:36:28,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:36:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:36:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:36:28,489 INFO L87 Difference]: Start difference. First operand 72688 states and 219689 transitions. Second operand has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 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) [2021-06-12 21:36:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:33,602 INFO L93 Difference]: Finished difference Result 170493 states and 513114 transitions. [2021-06-12 21:36:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-12 21:36:33,602 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 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 56 [2021-06-12 21:36:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:33,872 INFO L225 Difference]: With dead ends: 170493 [2021-06-12 21:36:33,872 INFO L226 Difference]: Without dead ends: 169553 [2021-06-12 21:36:33,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8291 ImplicationChecksByTransitivity, 3505.9ms TimeCoverageRelationStatistics Valid=3453, Invalid=17427, Unknown=0, NotChecked=0, Total=20880 [2021-06-12 21:36:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169553 states. [2021-06-12 21:36:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169553 to 74806. [2021-06-12 21:36:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74806 states, 74805 states have (on average 3.0193168905821803) internal successors, (225860), 74805 states have internal predecessors, (225860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74806 states to 74806 states and 225860 transitions. [2021-06-12 21:36:35,938 INFO L78 Accepts]: Start accepts. Automaton has 74806 states and 225860 transitions. Word has length 56 [2021-06-12 21:36:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:35,938 INFO L482 AbstractCegarLoop]: Abstraction has 74806 states and 225860 transitions. [2021-06-12 21:36:35,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 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) [2021-06-12 21:36:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 74806 states and 225860 transitions. [2021-06-12 21:36:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:36:36,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:36,046 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:36:36,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 21:36:36,247 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash 189610307, now seen corresponding path program 30 times [2021-06-12 21:36:36,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:36,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842611145] [2021-06-12 21:36:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:36:36,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:36,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842611145] [2021-06-12 21:36:36,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842611145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:36,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737861650] [2021-06-12 21:36:36,878 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:36,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:36:36,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:36:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:37,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:37,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:37,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:37,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:36:37,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:37,237 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:36:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:36:37,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:37,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:37,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:36:37,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-12 21:36:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:36:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737861650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:37,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:37,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-12 21:36:37,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744556256] [2021-06-12 21:36:37,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:37,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:37,327 INFO L87 Difference]: Start difference. First operand 74806 states and 225860 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:37,965 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 21:36:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:43,183 INFO L93 Difference]: Finished difference Result 187352 states and 562565 transitions. [2021-06-12 21:36:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-12 21:36:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:36:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:43,771 INFO L225 Difference]: With dead ends: 187352 [2021-06-12 21:36:43,772 INFO L226 Difference]: Without dead ends: 186098 [2021-06-12 21:36:43,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10262 ImplicationChecksByTransitivity, 4670.1ms TimeCoverageRelationStatistics Valid=3411, Invalid=22029, Unknown=0, NotChecked=0, Total=25440 [2021-06-12 21:36:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186098 states. [2021-06-12 21:36:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186098 to 91016. [2021-06-12 21:36:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91016 states, 91015 states have (on average 3.040839422073285) internal successors, (276762), 91015 states have internal predecessors, (276762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91016 states to 91016 states and 276762 transitions. [2021-06-12 21:36:46,454 INFO L78 Accepts]: Start accepts. Automaton has 91016 states and 276762 transitions. Word has length 56 [2021-06-12 21:36:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:46,454 INFO L482 AbstractCegarLoop]: Abstraction has 91016 states and 276762 transitions. [2021-06-12 21:36:46,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 91016 states and 276762 transitions. [2021-06-12 21:36:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:36:46,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:46,594 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:36:46,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:46,795 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1734125747, now seen corresponding path program 31 times [2021-06-12 21:36:46,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:46,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15883293] [2021-06-12 21:36:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:47,284 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-06-12 21:36:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:36:47,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:47,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15883293] [2021-06-12 21:36:47,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15883293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:47,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198169384] [2021-06-12 21:36:47,487 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 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 [2021-06-12 21:36:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 21:36:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:47,708 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 21 treesize of output 13 [2021-06-12 21:36:47,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:47,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:47,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:47,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-06-12 21:36:48,116 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_76], 6=[q1], 10=[v_prenex_75]} [2021-06-12 21:36:48,121 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 21 treesize of output 13 [2021-06-12 21:36:48,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:48,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:48,170 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 21 treesize of output 13 [2021-06-12 21:36:48,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:48,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 21:36:48,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:48,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:48,216 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:36:48,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:36:48,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:48,257 INFO L628 ElimStorePlain]: treesize reduction 45, result has 57.9 percent of original size [2021-06-12 21:36:48,261 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-12 21:36:48,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:36:48,263 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:48,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:48,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:36:48,273 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:172, output treesize:25 [2021-06-12 21:36:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:36:48,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198169384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:48,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:48,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-12 21:36:48,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424129057] [2021-06-12 21:36:48,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:36:48,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:48,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:36:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:36:48,373 INFO L87 Difference]: Start difference. First operand 91016 states and 276762 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 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) [2021-06-12 21:36:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:52,332 INFO L93 Difference]: Finished difference Result 133556 states and 405201 transitions. [2021-06-12 21:36:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-12 21:36:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 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 56 [2021-06-12 21:36:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:52,746 INFO L225 Difference]: With dead ends: 133556 [2021-06-12 21:36:52,747 INFO L226 Difference]: Without dead ends: 130250 [2021-06-12 21:36:52,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 3292.6ms TimeCoverageRelationStatistics Valid=1210, Invalid=8102, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 21:36:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130250 states. [2021-06-12 21:36:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130250 to 96219. [2021-06-12 21:36:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96219 states, 96218 states have (on average 3.0401899852418466) internal successors, (292521), 96218 states have internal predecessors, (292521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96219 states to 96219 states and 292521 transitions. [2021-06-12 21:36:54,770 INFO L78 Accepts]: Start accepts. Automaton has 96219 states and 292521 transitions. Word has length 56 [2021-06-12 21:36:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:54,770 INFO L482 AbstractCegarLoop]: Abstraction has 96219 states and 292521 transitions. [2021-06-12 21:36:54,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 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) [2021-06-12 21:36:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 96219 states and 292521 transitions. [2021-06-12 21:36:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:36:54,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:54,904 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:36:55,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:55,109 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash -210435843, now seen corresponding path program 32 times [2021-06-12 21:36:55,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:55,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844429121] [2021-06-12 21:36:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:36:55,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:55,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844429121] [2021-06-12 21:36:55,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844429121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:55,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861820581] [2021-06-12 21:36:55,332 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 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 [2021-06-12 21:36:55,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:36:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:55,893 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-12 21:36:55,944 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 21 treesize of output 13 [2021-06-12 21:36:55,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:55,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:55,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:55,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:36 [2021-06-12 21:36:56,423 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_85], 1=[v_prenex_79], 3=[v_prenex_78], 6=[q1, v_prenex_84]} [2021-06-12 21:36:56,427 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 24 treesize of output 18 [2021-06-12 21:36:56,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:56,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,487 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 30 treesize of output 18 [2021-06-12 21:36:56,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:56,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,545 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:36:56,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 20 [2021-06-12 21:36:56,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:56,622 INFO L628 ElimStorePlain]: treesize reduction 7, result has 95.2 percent of original size [2021-06-12 21:36:56,628 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:36:56,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:36:56,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:56,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,664 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-12 21:36:56,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2021-06-12 21:36:56,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:56,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:56,693 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:36:56,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:36:56,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:56,722 INFO L628 ElimStorePlain]: treesize reduction 15, result has 71.2 percent of original size [2021-06-12 21:36:56,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:36:56,722 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:196, output treesize:37 [2021-06-12 21:36:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:36:56,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861820581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:56,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:56,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:36:56,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854618856] [2021-06-12 21:36:56,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:36:56,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:56,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:36:56,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:36:56,792 INFO L87 Difference]: Start difference. First operand 96219 states and 292521 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 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) [2021-06-12 21:36:57,158 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-06-12 21:37:01,619 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-06-12 21:37:03,157 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-12 21:37:03,397 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-12 21:37:07,239 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-06-12 21:37:07,770 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-12 21:37:08,040 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-12 21:37:09,098 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-12 21:37:09,263 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-12 21:37:09,424 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2021-06-12 21:37:10,133 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-12 21:37:11,660 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-06-12 21:37:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:13,880 INFO L93 Difference]: Finished difference Result 118761 states and 358389 transitions. [2021-06-12 21:37:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-06-12 21:37:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 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 56 [2021-06-12 21:37:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:14,072 INFO L225 Difference]: With dead ends: 118761 [2021-06-12 21:37:14,072 INFO L226 Difference]: Without dead ends: 116293 [2021-06-12 21:37:14,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28935 ImplicationChecksByTransitivity, 14837.9ms TimeCoverageRelationStatistics Valid=9125, Invalid=57181, Unknown=0, NotChecked=0, Total=66306 [2021-06-12 21:37:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116293 states. [2021-06-12 21:37:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116293 to 96441. [2021-06-12 21:37:15,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96441 states, 96440 states have (on average 3.04013894649523) internal successors, (293191), 96440 states have internal predecessors, (293191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96441 states to 96441 states and 293191 transitions. [2021-06-12 21:37:16,325 INFO L78 Accepts]: Start accepts. Automaton has 96441 states and 293191 transitions. Word has length 56 [2021-06-12 21:37:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:16,325 INFO L482 AbstractCegarLoop]: Abstraction has 96441 states and 293191 transitions. [2021-06-12 21:37:16,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 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) [2021-06-12 21:37:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 96441 states and 293191 transitions. [2021-06-12 21:37:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:37:16,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:16,536 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:37:16,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 21:37:16,753 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash -150730999, now seen corresponding path program 33 times [2021-06-12 21:37:16,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:16,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395490528] [2021-06-12 21:37:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:17,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:17,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395490528] [2021-06-12 21:37:17,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395490528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:17,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267688817] [2021-06-12 21:37:17,644 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 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 [2021-06-12 21:37:17,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 21:37:17,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:37:17,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:18,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:37:18,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:18,174 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:37:18,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:37:18,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:18,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:18,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:37:18,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-12 21:37:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267688817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:18,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:18,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-12 21:37:18,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850689843] [2021-06-12 21:37:18,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:37:18,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:18,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:37:18,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:37:18,250 INFO L87 Difference]: Start difference. First operand 96441 states and 293191 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:27,532 INFO L93 Difference]: Finished difference Result 182758 states and 548785 transitions. [2021-06-12 21:37:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-06-12 21:37:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:37:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:27,856 INFO L225 Difference]: With dead ends: 182758 [2021-06-12 21:37:27,856 INFO L226 Difference]: Without dead ends: 182224 [2021-06-12 21:37:27,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18105 ImplicationChecksByTransitivity, 7157.5ms TimeCoverageRelationStatistics Valid=8177, Invalid=34053, Unknown=0, NotChecked=0, Total=42230 [2021-06-12 21:37:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182224 states. [2021-06-12 21:37:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182224 to 87933. [2021-06-12 21:37:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87933 states, 87932 states have (on average 3.0219601510257927) internal successors, (265727), 87932 states have internal predecessors, (265727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87933 states to 87933 states and 265727 transitions. [2021-06-12 21:37:30,438 INFO L78 Accepts]: Start accepts. Automaton has 87933 states and 265727 transitions. Word has length 56 [2021-06-12 21:37:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:30,439 INFO L482 AbstractCegarLoop]: Abstraction has 87933 states and 265727 transitions. [2021-06-12 21:37:30,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 87933 states and 265727 transitions. [2021-06-12 21:37:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:37:30,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:30,572 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:37:30,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 21:37:30,773 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1534591291, now seen corresponding path program 34 times [2021-06-12 21:37:30,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:30,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985803729] [2021-06-12 21:37:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:37:31,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985803729] [2021-06-12 21:37:31,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985803729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:31,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424576253] [2021-06-12 21:37:31,016 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 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 [2021-06-12 21:37:31,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:37:31,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:37:31,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:31,166 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 21 treesize of output 13 [2021-06-12 21:37:31,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:31,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:31,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:37:31,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-12 21:37:31,542 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_90], 1=[q3], 6=[q1, v_prenex_88]} [2021-06-12 21:37:31,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 21:37:31,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:31,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:31,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:31,830 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 15 [2021-06-12 21:37:31,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:31,833 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 21 treesize of output 13 [2021-06-12 21:37:31,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:31,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:31,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:31,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:31,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:37:31,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:31,885 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:37:31,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:37:31,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:31,913 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-12 21:37:31,913 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-12 21:37:31,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:37:31,913 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-12 21:37:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:37:31,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424576253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:31,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:31,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 21:37:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985012186] [2021-06-12 21:37:31,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:37:31,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:31,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:37:31,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:37:31,963 INFO L87 Difference]: Start difference. First operand 87933 states and 265727 transitions. Second operand has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 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) [2021-06-12 21:37:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:34,704 INFO L93 Difference]: Finished difference Result 103575 states and 312132 transitions. [2021-06-12 21:37:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 21:37:34,705 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 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 56 [2021-06-12 21:37:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:34,859 INFO L225 Difference]: With dead ends: 103575 [2021-06-12 21:37:34,859 INFO L226 Difference]: Without dead ends: 102231 [2021-06-12 21:37:34,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1822.9ms TimeCoverageRelationStatistics Valid=787, Invalid=3905, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 21:37:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102231 states. [2021-06-12 21:37:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102231 to 88331. [2021-06-12 21:37:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88331 states, 88330 states have (on average 3.0222461224951886) internal successors, (266955), 88330 states have internal predecessors, (266955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88331 states to 88331 states and 266955 transitions. [2021-06-12 21:37:36,684 INFO L78 Accepts]: Start accepts. Automaton has 88331 states and 266955 transitions. Word has length 56 [2021-06-12 21:37:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:36,685 INFO L482 AbstractCegarLoop]: Abstraction has 88331 states and 266955 transitions. [2021-06-12 21:37:36,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 28 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) [2021-06-12 21:37:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 88331 states and 266955 transitions. [2021-06-12 21:37:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:37:36,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:36,827 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:37:37,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:37,029 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash -446962657, now seen corresponding path program 35 times [2021-06-12 21:37:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:37,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108697422] [2021-06-12 21:37:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:37,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:37,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108697422] [2021-06-12 21:37:37,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108697422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:37,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70836963] [2021-06-12 21:37:37,362 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 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 [2021-06-12 21:37:37,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:37:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:37:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:38,086 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_92, q3], 1=[v_prenex_94, v_prenex_96], 3=[v_prenex_98]} [2021-06-12 21:37:38,095 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 7 treesize of output 3 [2021-06-12 21:37:38,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:38,194 INFO L628 ElimStorePlain]: treesize reduction 38, result has 83.3 percent of original size [2021-06-12 21:37:38,194 INFO L518 ElimStorePlain]: Eliminatee q3 vanished before elimination [2021-06-12 21:37:38,200 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:37:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 5 [2021-06-12 21:37:38,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:38,274 INFO L628 ElimStorePlain]: treesize reduction 37, result has 79.1 percent of original size [2021-06-12 21:37:38,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-12 21:37:38,278 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:37:38,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-12 21:37:38,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:38,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:37:38,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:235, output treesize:124 [2021-06-12 21:37:38,414 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:37:38,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:37:38,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:38,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:38,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:37:38,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:37:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:38,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70836963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:38,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:38,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-12 21:37:38,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932414347] [2021-06-12 21:37:38,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:37:38,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:37:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:37:38,460 INFO L87 Difference]: Start difference. First operand 88331 states and 266955 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:44,858 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-12 21:37:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:47,092 INFO L93 Difference]: Finished difference Result 135112 states and 404915 transitions. [2021-06-12 21:37:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-06-12 21:37:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:37:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:47,328 INFO L225 Difference]: With dead ends: 135112 [2021-06-12 21:37:47,328 INFO L226 Difference]: Without dead ends: 134978 [2021-06-12 21:37:47,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10563 ImplicationChecksByTransitivity, 6250.9ms TimeCoverageRelationStatistics Valid=4484, Invalid=22576, Unknown=0, NotChecked=0, Total=27060 [2021-06-12 21:37:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134978 states. [2021-06-12 21:37:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134978 to 88414. [2021-06-12 21:37:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88414 states, 88413 states have (on average 3.0223044122470677) internal successors, (267211), 88413 states have internal predecessors, (267211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88414 states to 88414 states and 267211 transitions. [2021-06-12 21:37:49,362 INFO L78 Accepts]: Start accepts. Automaton has 88414 states and 267211 transitions. Word has length 56 [2021-06-12 21:37:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:49,363 INFO L482 AbstractCegarLoop]: Abstraction has 88414 states and 267211 transitions. [2021-06-12 21:37:49,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 88414 states and 267211 transitions. [2021-06-12 21:37:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:37:49,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:49,487 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:37:49,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 21:37:49,687 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:49,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1594296135, now seen corresponding path program 36 times [2021-06-12 21:37:49,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:49,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456707356] [2021-06-12 21:37:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:49,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:49,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456707356] [2021-06-12 21:37:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456707356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:49,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121407339] [2021-06-12 21:37:49,974 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 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 [2021-06-12 21:37:50,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:37:50,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:50,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:37:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:50,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:37:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:37:50,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:50,410 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:37:50,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:37:50,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:37:50,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:37:50,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:37:50,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-12 21:37:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:50,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121407339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:50,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:50,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-12 21:37:50,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395718912] [2021-06-12 21:37:50,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:37:50,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:37:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:37:50,483 INFO L87 Difference]: Start difference. First operand 88414 states and 267211 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:50,769 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-12 21:38:02,701 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-12 21:38:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:04,061 INFO L93 Difference]: Finished difference Result 210505 states and 628873 transitions. [2021-06-12 21:38:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-12 21:38:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:38:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:04,481 INFO L225 Difference]: With dead ends: 210505 [2021-06-12 21:38:04,481 INFO L226 Difference]: Without dead ends: 210505 [2021-06-12 21:38:04,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26802 ImplicationChecksByTransitivity, 10542.3ms TimeCoverageRelationStatistics Valid=10131, Invalid=51125, Unknown=0, NotChecked=0, Total=61256 [2021-06-12 21:38:04,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210505 states. [2021-06-12 21:38:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210505 to 94167. [2021-06-12 21:38:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94167 states, 94166 states have (on average 3.0259541660471934) internal successors, (284942), 94166 states have internal predecessors, (284942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94167 states to 94167 states and 284942 transitions. [2021-06-12 21:38:07,295 INFO L78 Accepts]: Start accepts. Automaton has 94167 states and 284942 transitions. Word has length 56 [2021-06-12 21:38:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:07,295 INFO L482 AbstractCegarLoop]: Abstraction has 94167 states and 284942 transitions. [2021-06-12 21:38:07,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 94167 states and 284942 transitions. [2021-06-12 21:38:07,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:38:07,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:07,424 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:38:07,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:07,626 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1648612163, now seen corresponding path program 37 times [2021-06-12 21:38:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:07,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713690187] [2021-06-12 21:38:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:38:07,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:07,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713690187] [2021-06-12 21:38:07,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713690187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:07,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817157083] [2021-06-12 21:38:07,916 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 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 [2021-06-12 21:38:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:38:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:08,065 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 21 treesize of output 13 [2021-06-12 21:38:08,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:08,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:08,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:08,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-12 21:38:08,743 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, v_prenex_104, v_prenex_106], 1=[v_prenex_100], 3=[q3]} [2021-06-12 21:38:08,748 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 21 treesize of output 13 [2021-06-12 21:38:08,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:08,862 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-12 21:38:08,862 INFO L628 ElimStorePlain]: treesize reduction 49, result has 84.0 percent of original size [2021-06-12 21:38:08,862 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-12 21:38:08,865 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 9 [2021-06-12 21:38:08,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:08,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:08,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:38:08,925 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 15 [2021-06-12 21:38:08,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:08,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:08,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:08,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:08,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:08,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:38:08,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:08,986 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:38:08,986 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 [2021-06-12 21:38:08,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:09,057 INFO L628 ElimStorePlain]: treesize reduction 26, result has 84.4 percent of original size [2021-06-12 21:38:09,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:38:09,058 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:317, output treesize:137 [2021-06-12 21:38:09,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:38:09,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:38:09,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:09,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-12 21:38:09,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:09,160 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-12 21:38:09,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:38:09,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:09,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:09,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:38:09,180 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:48 [2021-06-12 21:38:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:38:09,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817157083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:09,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:09,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-06-12 21:38:09,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905034987] [2021-06-12 21:38:09,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:38:09,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:09,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:38:09,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:38:09,369 INFO L87 Difference]: Start difference. First operand 94167 states and 284942 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:11,486 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-12 21:38:12,250 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-12 21:38:12,670 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-06-12 21:38:13,497 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-12 21:38:13,647 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-12 21:38:14,211 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-06-12 21:38:14,853 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-12 21:38:15,397 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-12 21:38:19,854 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-12 21:38:21,196 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-12 21:38:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:21,316 INFO L93 Difference]: Finished difference Result 145326 states and 435894 transitions. [2021-06-12 21:38:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-12 21:38:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:38:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:21,583 INFO L225 Difference]: With dead ends: 145326 [2021-06-12 21:38:21,583 INFO L226 Difference]: Without dead ends: 144746 [2021-06-12 21:38:21,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16142 ImplicationChecksByTransitivity, 10654.5ms TimeCoverageRelationStatistics Valid=6761, Invalid=30295, Unknown=0, NotChecked=0, Total=37056 [2021-06-12 21:38:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144746 states. [2021-06-12 21:38:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144746 to 94431. [2021-06-12 21:38:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94431 states, 94430 states have (on average 3.0269300010589855) internal successors, (285833), 94430 states have internal predecessors, (285833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94431 states to 94431 states and 285833 transitions. [2021-06-12 21:38:23,651 INFO L78 Accepts]: Start accepts. Automaton has 94431 states and 285833 transitions. Word has length 56 [2021-06-12 21:38:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:23,651 INFO L482 AbstractCegarLoop]: Abstraction has 94431 states and 285833 transitions. [2021-06-12 21:38:23,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 94431 states and 285833 transitions. [2021-06-12 21:38:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:38:23,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:23,773 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:38:23,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 21:38:23,974 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1347602821, now seen corresponding path program 38 times [2021-06-12 21:38:23,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:23,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602844382] [2021-06-12 21:38:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:38:24,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602844382] [2021-06-12 21:38:24,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602844382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610540106] [2021-06-12 21:38:24,677 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 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 [2021-06-12 21:38:24,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:38:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:24,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:38:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:25,069 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_112], 1=[v_prenex_108, v_prenex_114], 3=[v_prenex_110]} [2021-06-12 21:38:25,074 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 5 treesize of output 3 [2021-06-12 21:38:25,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:25,133 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 7 treesize of output 3 [2021-06-12 21:38:25,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,226 INFO L628 ElimStorePlain]: treesize reduction 33, result has 85.2 percent of original size [2021-06-12 21:38:25,231 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:38:25,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 5 [2021-06-12 21:38:25,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:25,279 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:38:25,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 5 [2021-06-12 21:38:25,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,348 INFO L628 ElimStorePlain]: treesize reduction 26, result has 84.3 percent of original size [2021-06-12 21:38:25,352 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:38:25,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-12 21:38:25,353 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:25,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:38:25,385 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:235, output treesize:124 [2021-06-12 21:38:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:38:25,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:38:25,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:38:25,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,482 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:38:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:38:25,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:25,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:25,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:38:25,498 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:144, output treesize:41 [2021-06-12 21:38:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:38:25,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610540106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:25,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:25,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-12 21:38:25,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332747936] [2021-06-12 21:38:25,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:38:25,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:38:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:38:25,604 INFO L87 Difference]: Start difference. First operand 94431 states and 285833 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:25,832 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-06-12 21:38:29,621 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-12 21:38:33,681 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-12 21:38:35,883 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-12 21:38:36,602 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-12 21:38:36,812 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-12 21:38:36,984 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-12 21:38:38,635 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-12 21:38:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:39,721 INFO L93 Difference]: Finished difference Result 144735 states and 434420 transitions. [2021-06-12 21:38:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-12 21:38:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:38:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:40,113 INFO L225 Difference]: With dead ends: 144735 [2021-06-12 21:38:40,113 INFO L226 Difference]: Without dead ends: 144001 [2021-06-12 21:38:40,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17827 ImplicationChecksByTransitivity, 12590.3ms TimeCoverageRelationStatistics Valid=6322, Invalid=37988, Unknown=0, NotChecked=0, Total=44310 [2021-06-12 21:38:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144001 states. [2021-06-12 21:38:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144001 to 94515. [2021-06-12 21:38:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94515 states, 94514 states have (on average 3.02658865353281) internal successors, (286055), 94514 states have internal predecessors, (286055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94515 states to 94515 states and 286055 transitions. [2021-06-12 21:38:42,610 INFO L78 Accepts]: Start accepts. Automaton has 94515 states and 286055 transitions. Word has length 56 [2021-06-12 21:38:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:42,610 INFO L482 AbstractCegarLoop]: Abstraction has 94515 states and 286055 transitions. [2021-06-12 21:38:42,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 94515 states and 286055 transitions. [2021-06-12 21:38:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:38:42,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:42,791 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:43,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:43,005 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:43,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1436448654, now seen corresponding path program 39 times [2021-06-12 21:38:43,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:43,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440335955] [2021-06-12 21:38:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:38:43,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:43,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440335955] [2021-06-12 21:38:43,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440335955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:43,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818374109] [2021-06-12 21:38:43,141 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 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 [2021-06-12 21:38:43,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:38:43,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:38:43,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:43,297 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:38:43,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:38:43,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:43,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:43,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:43,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-06-12 21:38:43,379 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 [2021-06-12 21:38:43,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:43,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:43,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:43,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-12 21:38:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:38:43,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818374109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:43,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:43,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-12 21:38:43,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500540344] [2021-06-12 21:38:43,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:38:43,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:43,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:38:43,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:38:43,421 INFO L87 Difference]: Start difference. First operand 94515 states and 286055 transitions. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:46,870 INFO L93 Difference]: Finished difference Result 168094 states and 509048 transitions. [2021-06-12 21:38:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-12 21:38:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:38:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:47,158 INFO L225 Difference]: With dead ends: 168094 [2021-06-12 21:38:47,158 INFO L226 Difference]: Without dead ends: 161191 [2021-06-12 21:38:47,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 1661.7ms TimeCoverageRelationStatistics Valid=1410, Invalid=9932, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 21:38:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161191 states. [2021-06-12 21:38:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161191 to 63031. [2021-06-12 21:38:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63031 states, 63030 states have (on average 3.0277962874821513) internal successors, (190842), 63030 states have internal predecessors, (190842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63031 states to 63031 states and 190842 transitions. [2021-06-12 21:38:49,224 INFO L78 Accepts]: Start accepts. Automaton has 63031 states and 190842 transitions. Word has length 56 [2021-06-12 21:38:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:49,224 INFO L482 AbstractCegarLoop]: Abstraction has 63031 states and 190842 transitions. [2021-06-12 21:38:49,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 63031 states and 190842 transitions. [2021-06-12 21:38:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:38:49,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:49,300 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:38:49,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:49,522 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash 120447938, now seen corresponding path program 40 times [2021-06-12 21:38:49,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:49,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978529483] [2021-06-12 21:38:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:38:49,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:49,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978529483] [2021-06-12 21:38:49,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978529483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:49,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128374885] [2021-06-12 21:38:49,836 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 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 [2021-06-12 21:38:49,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:38:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:38:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:50,001 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 21 treesize of output 13 [2021-06-12 21:38:50,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:50,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:50,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:50,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-12 21:38:50,290 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_116], 10=[q1]} [2021-06-12 21:38:50,292 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 21 treesize of output 13 [2021-06-12 21:38:50,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:50,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:50,321 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 21 treesize of output 13 [2021-06-12 21:38:50,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:50,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:38:50,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-12 21:38:50,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:50,360 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:38:50,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:38:50,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:50,570 INFO L628 ElimStorePlain]: treesize reduction 12, result has 65.7 percent of original size [2021-06-12 21:38:50,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:38:50,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:21 [2021-06-12 21:38:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:38:50,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128374885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:50,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:50,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-06-12 21:38:50,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865965656] [2021-06-12 21:38:50,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:38:50,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:50,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:38:50,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:38:50,645 INFO L87 Difference]: Start difference. First operand 63031 states and 190842 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 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) [2021-06-12 21:38:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:53,386 INFO L93 Difference]: Finished difference Result 107642 states and 325348 transitions. [2021-06-12 21:38:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:38:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 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 56 [2021-06-12 21:38:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:53,539 INFO L225 Difference]: With dead ends: 107642 [2021-06-12 21:38:53,539 INFO L226 Difference]: Without dead ends: 102118 [2021-06-12 21:38:53,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1877.1ms TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:38:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102118 states. [2021-06-12 21:38:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102118 to 66355. [2021-06-12 21:38:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66355 states, 66354 states have (on average 3.0275642764565815) internal successors, (200891), 66354 states have internal predecessors, (200891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66355 states to 66355 states and 200891 transitions. [2021-06-12 21:38:54,878 INFO L78 Accepts]: Start accepts. Automaton has 66355 states and 200891 transitions. Word has length 56 [2021-06-12 21:38:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:38:54,878 INFO L482 AbstractCegarLoop]: Abstraction has 66355 states and 200891 transitions. [2021-06-12 21:38:54,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 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) [2021-06-12 21:38:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 66355 states and 200891 transitions. [2021-06-12 21:38:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:38:54,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:38:54,964 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:38:55,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:38:55,165 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:38:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:38:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2111806327, now seen corresponding path program 41 times [2021-06-12 21:38:55,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:38:55,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931072078] [2021-06-12 21:38:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:38:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:38:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:38:55,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:38:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931072078] [2021-06-12 21:38:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931072078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:55,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007349880] [2021-06-12 21:38:55,369 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 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 [2021-06-12 21:38:55,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:38:55,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:38:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:38:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:38:55,875 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:38:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 21:38:55,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:38:55,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:38:55,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:38:55,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-06-12 21:38:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:38:55,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007349880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:38:55,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:38:55,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-06-12 21:38:55,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354593792] [2021-06-12 21:38:55,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:38:55,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:38:55,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:38:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:38:55,931 INFO L87 Difference]: Start difference. First operand 66355 states and 200891 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:38:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:38:59,234 INFO L93 Difference]: Finished difference Result 94843 states and 285713 transitions. [2021-06-12 21:38:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 21:38:59,234 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:38:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:38:59,374 INFO L225 Difference]: With dead ends: 94843 [2021-06-12 21:38:59,374 INFO L226 Difference]: Without dead ends: 93226 [2021-06-12 21:38:59,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 2301.3ms TimeCoverageRelationStatistics Valid=1769, Invalid=7161, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 21:38:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93226 states. [2021-06-12 21:39:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93226 to 68214. [2021-06-12 21:39:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68214 states, 68213 states have (on average 3.0280151877208157) internal successors, (206550), 68213 states have internal predecessors, (206550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68214 states to 68214 states and 206550 transitions. [2021-06-12 21:39:00,725 INFO L78 Accepts]: Start accepts. Automaton has 68214 states and 206550 transitions. Word has length 56 [2021-06-12 21:39:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:00,725 INFO L482 AbstractCegarLoop]: Abstraction has 68214 states and 206550 transitions. [2021-06-12 21:39:00,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 24 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 68214 states and 206550 transitions. [2021-06-12 21:39:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:39:00,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:00,818 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:39:01,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:01,019 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:01,019 INFO L82 PathProgramCache]: Analyzing trace with hash 130252379, now seen corresponding path program 42 times [2021-06-12 21:39:01,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:01,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413620970] [2021-06-12 21:39:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:01,439 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-12 21:39:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:39:01,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:01,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413620970] [2021-06-12 21:39:01,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413620970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:01,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703455450] [2021-06-12 21:39:01,872 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 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 [2021-06-12 21:39:01,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:39:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:39:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:02,333 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:39:02,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:39:02,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:02,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:02,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:02,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:39:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703455450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:02,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:02,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-06-12 21:39:02,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994469736] [2021-06-12 21:39:02,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:39:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:39:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:39:02,390 INFO L87 Difference]: Start difference. First operand 68214 states and 206550 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:17,283 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-12 21:39:17,438 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-12 21:39:17,589 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 21:39:18,423 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-12 21:39:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:22,987 INFO L93 Difference]: Finished difference Result 134363 states and 399183 transitions. [2021-06-12 21:39:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-06-12 21:39:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:39:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:23,209 INFO L225 Difference]: With dead ends: 134363 [2021-06-12 21:39:23,209 INFO L226 Difference]: Without dead ends: 132419 [2021-06-12 21:39:23,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39310 ImplicationChecksByTransitivity, 17074.8ms TimeCoverageRelationStatistics Valid=9025, Invalid=85531, Unknown=0, NotChecked=0, Total=94556 [2021-06-12 21:39:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132419 states. [2021-06-12 21:39:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132419 to 71888. [2021-06-12 21:39:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71888 states, 71887 states have (on average 3.0334831054293545) internal successors, (218068), 71887 states have internal predecessors, (218068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71888 states to 71888 states and 218068 transitions. [2021-06-12 21:39:24,738 INFO L78 Accepts]: Start accepts. Automaton has 71888 states and 218068 transitions. Word has length 56 [2021-06-12 21:39:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:24,738 INFO L482 AbstractCegarLoop]: Abstraction has 71888 states and 218068 transitions. [2021-06-12 21:39:24,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 71888 states and 218068 transitions. [2021-06-12 21:39:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:39:24,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:24,829 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:39:25,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:25,030 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:25,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1860816747, now seen corresponding path program 43 times [2021-06-12 21:39:25,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:25,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763457151] [2021-06-12 21:39:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:25,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:25,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763457151] [2021-06-12 21:39:25,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763457151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:25,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004617347] [2021-06-12 21:39:25,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:39:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 21:39:25,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:25,477 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 21 treesize of output 13 [2021-06-12 21:39:25,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:25,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:25,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:39:25,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:38 [2021-06-12 21:39:26,131 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_118, v_prenex_120, v_prenex_122], 1=[q3, v_prenex_124]} [2021-06-12 21:39:26,135 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 21 treesize of output 13 [2021-06-12 21:39:26,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:26,245 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 21:39:26,245 INFO L628 ElimStorePlain]: treesize reduction 60, result has 79.4 percent of original size [2021-06-12 21:39:26,246 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-12 21:39:26,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 21:39:26,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:26,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:26,717 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:39:26,717 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 [2021-06-12 21:39:26,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:26,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:26,774 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:39:26,774 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 [2021-06-12 21:39:26,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:26,839 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.1 percent of original size [2021-06-12 21:39:26,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:39:26,840 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:302, output treesize:133 [2021-06-12 21:39:26,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,956 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-06-12 21:39:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 24 [2021-06-12 21:39:26,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:26,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:26,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:39:26,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 21:39:26,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:26,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:26,983 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-06-12 21:39:26,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 22 [2021-06-12 21:39:26,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:27,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:27,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:39:27,009 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:157, output treesize:37 [2021-06-12 21:39:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:39:27,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004617347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:27,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:27,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-12 21:39:27,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632238394] [2021-06-12 21:39:27,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 21:39:27,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 21:39:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:39:27,120 INFO L87 Difference]: Start difference. First operand 71888 states and 218068 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:35,500 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-12 21:39:36,388 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-12 21:39:36,521 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-12 21:39:36,809 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2021-06-12 21:39:37,268 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2021-06-12 21:39:37,429 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-12 21:39:37,722 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-12 21:39:38,341 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-12 21:39:38,504 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-12 21:39:39,293 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-12 21:39:39,427 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-12 21:39:39,641 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-12 21:39:39,941 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-12 21:39:40,105 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-12 21:39:40,252 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-12 21:39:40,407 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-12 21:39:40,659 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-12 21:39:40,826 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-12 21:39:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:41,123 INFO L93 Difference]: Finished difference Result 137760 states and 413530 transitions. [2021-06-12 21:39:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-12 21:39:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:39:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:41,368 INFO L225 Difference]: With dead ends: 137760 [2021-06-12 21:39:41,368 INFO L226 Difference]: Without dead ends: 137606 [2021-06-12 21:39:41,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14412 ImplicationChecksByTransitivity, 10516.0ms TimeCoverageRelationStatistics Valid=7257, Invalid=27525, Unknown=0, NotChecked=0, Total=34782 [2021-06-12 21:39:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137606 states. [2021-06-12 21:39:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137606 to 76981. [2021-06-12 21:39:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76981 states, 76980 states have (on average 3.0353988048843856) internal successors, (233665), 76980 states have internal predecessors, (233665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76981 states to 76981 states and 233665 transitions. [2021-06-12 21:39:43,286 INFO L78 Accepts]: Start accepts. Automaton has 76981 states and 233665 transitions. Word has length 56 [2021-06-12 21:39:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:43,287 INFO L482 AbstractCegarLoop]: Abstraction has 76981 states and 233665 transitions. [2021-06-12 21:39:43,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 76981 states and 233665 transitions. [2021-06-12 21:39:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:39:43,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:43,406 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:39:43,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:39:43,606 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:43,607 INFO L82 PathProgramCache]: Analyzing trace with hash -354012671, now seen corresponding path program 44 times [2021-06-12 21:39:43,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:43,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228187258] [2021-06-12 21:39:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:39:43,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:43,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228187258] [2021-06-12 21:39:43,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228187258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:43,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240873200] [2021-06-12 21:39:43,805 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 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 [2021-06-12 21:39:43,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:39:43,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:39:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:39:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:39:44,160 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 7 treesize of output 3 [2021-06-12 21:39:44,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:44,202 INFO L628 ElimStorePlain]: treesize reduction 38, result has 68.1 percent of original size [2021-06-12 21:39:44,202 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-06-12 21:39:44,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:39:44,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:79 [2021-06-12 21:39:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:39:44,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:39:44,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:44,317 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:39:44,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:39:44,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:39:44,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:39:44,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:39:44,327 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:26 [2021-06-12 21:39:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:39:44,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240873200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:44,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:39:44,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-12 21:39:44,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889857741] [2021-06-12 21:39:44,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:39:44,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:39:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:39:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:39:44,403 INFO L87 Difference]: Start difference. First operand 76981 states and 233665 transitions. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:48,824 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-06-12 21:39:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:39:57,219 INFO L93 Difference]: Finished difference Result 126205 states and 379875 transitions. [2021-06-12 21:39:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-06-12 21:39:57,220 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:39:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:39:57,427 INFO L225 Difference]: With dead ends: 126205 [2021-06-12 21:39:57,427 INFO L226 Difference]: Without dead ends: 125231 [2021-06-12 21:39:57,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14100 ImplicationChecksByTransitivity, 10878.9ms TimeCoverageRelationStatistics Valid=3688, Invalid=31844, Unknown=0, NotChecked=0, Total=35532 [2021-06-12 21:39:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125231 states. [2021-06-12 21:39:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125231 to 78489. [2021-06-12 21:39:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78489 states, 78488 states have (on average 3.035113647946183) internal successors, (238220), 78488 states have internal predecessors, (238220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78489 states to 78489 states and 238220 transitions. [2021-06-12 21:39:59,393 INFO L78 Accepts]: Start accepts. Automaton has 78489 states and 238220 transitions. Word has length 56 [2021-06-12 21:39:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:39:59,393 INFO L482 AbstractCegarLoop]: Abstraction has 78489 states and 238220 transitions. [2021-06-12 21:39:59,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:39:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 78489 states and 238220 transitions. [2021-06-12 21:39:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:39:59,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:39:59,498 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:39:59,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-12 21:39:59,698 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:39:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:39:59,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2050799049, now seen corresponding path program 45 times [2021-06-12 21:39:59,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:39:59,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94532604] [2021-06-12 21:39:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:39:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:39:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:39:59,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:39:59,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94532604] [2021-06-12 21:39:59,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94532604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:39:59,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111051450] [2021-06-12 21:39:59,953 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 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 [2021-06-12 21:40:00,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:40:00,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:40:00,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:00,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:00,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:00,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:00,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:40:00,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:00,724 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:40:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:40:00,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:00,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:00,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:40:00,731 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:13 [2021-06-12 21:40:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:40:00,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111051450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:00,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:00,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-12 21:40:00,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40236374] [2021-06-12 21:40:00,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:00,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:00,825 INFO L87 Difference]: Start difference. First operand 78489 states and 238220 transitions. Second operand has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 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) [2021-06-12 21:40:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:15,233 INFO L93 Difference]: Finished difference Result 150163 states and 450831 transitions. [2021-06-12 21:40:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-12 21:40:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 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 56 [2021-06-12 21:40:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:15,465 INFO L225 Difference]: With dead ends: 150163 [2021-06-12 21:40:15,465 INFO L226 Difference]: Without dead ends: 149303 [2021-06-12 21:40:15,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30461 ImplicationChecksByTransitivity, 12005.9ms TimeCoverageRelationStatistics Valid=7924, Invalid=61508, Unknown=0, NotChecked=0, Total=69432 [2021-06-12 21:40:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149303 states. [2021-06-12 21:40:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149303 to 76775. [2021-06-12 21:40:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76775 states, 76774 states have (on average 3.0367572355224426) internal successors, (233144), 76774 states have internal predecessors, (233144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76775 states to 76775 states and 233144 transitions. [2021-06-12 21:40:17,374 INFO L78 Accepts]: Start accepts. Automaton has 76775 states and 233144 transitions. Word has length 56 [2021-06-12 21:40:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:17,374 INFO L482 AbstractCegarLoop]: Abstraction has 76775 states and 233144 transitions. [2021-06-12 21:40:17,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 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) [2021-06-12 21:40:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 76775 states and 233144 transitions. [2021-06-12 21:40:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:40:17,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:17,473 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:40:17,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-12 21:40:17,674 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1706619151, now seen corresponding path program 46 times [2021-06-12 21:40:17,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:17,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784362296] [2021-06-12 21:40:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 21:40:18,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:18,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784362296] [2021-06-12 21:40:18,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784362296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:18,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053050825] [2021-06-12 21:40:18,177 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 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 [2021-06-12 21:40:18,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:40:18,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:40:18,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:18,351 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 21 treesize of output 13 [2021-06-12 21:40:18,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:18,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:33 [2021-06-12 21:40:18,640 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_128], 10=[q1]} [2021-06-12 21:40:18,642 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 21 treesize of output 13 [2021-06-12 21:40:18,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:18,683 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 13 treesize of output 9 [2021-06-12 21:40:18,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,686 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 21 treesize of output 13 [2021-06-12 21:40:18,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:40:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:40:18,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:18,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:40:18,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,748 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-12 21:40:18,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 18 [2021-06-12 21:40:18,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:18,767 INFO L628 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2021-06-12 21:40:18,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:40:18,768 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:167, output treesize:23 [2021-06-12 21:40:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:40:18,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053050825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:18,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:18,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-12 21:40:18,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616770835] [2021-06-12 21:40:18,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:40:18,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:18,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:40:18,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:40:18,836 INFO L87 Difference]: Start difference. First operand 76775 states and 233144 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:22,263 INFO L93 Difference]: Finished difference Result 187074 states and 565734 transitions. [2021-06-12 21:40:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 21:40:22,263 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:40:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:22,586 INFO L225 Difference]: With dead ends: 187074 [2021-06-12 21:40:22,586 INFO L226 Difference]: Without dead ends: 180481 [2021-06-12 21:40:22,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2321.4ms TimeCoverageRelationStatistics Valid=962, Invalid=5518, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 21:40:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180481 states. [2021-06-12 21:40:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180481 to 85464. [2021-06-12 21:40:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85464 states, 85463 states have (on average 3.0405087581760526) internal successors, (259851), 85463 states have internal predecessors, (259851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85464 states to 85464 states and 259851 transitions. [2021-06-12 21:40:24,891 INFO L78 Accepts]: Start accepts. Automaton has 85464 states and 259851 transitions. Word has length 56 [2021-06-12 21:40:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:24,891 INFO L482 AbstractCegarLoop]: Abstraction has 85464 states and 259851 transitions. [2021-06-12 21:40:24,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 85464 states and 259851 transitions. [2021-06-12 21:40:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:40:25,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:25,006 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:40:25,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-12 21:40:25,219 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1216084717, now seen corresponding path program 47 times [2021-06-12 21:40:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:25,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766487620] [2021-06-12 21:40:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:40:25,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:25,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766487620] [2021-06-12 21:40:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766487620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:25,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644918095] [2021-06-12 21:40:25,498 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 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 [2021-06-12 21:40:25,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:40:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:40:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 21:40:26,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644918095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:26,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:26,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 28 [2021-06-12 21:40:26,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305453287] [2021-06-12 21:40:26,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:40:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:26,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:40:26,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:40:26,365 INFO L87 Difference]: Start difference. First operand 85464 states and 259851 transitions. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:40:33,864 INFO L93 Difference]: Finished difference Result 108109 states and 325709 transitions. [2021-06-12 21:40:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-12 21:40:33,864 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:40:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:40:34,042 INFO L225 Difference]: With dead ends: 108109 [2021-06-12 21:40:34,042 INFO L226 Difference]: Without dead ends: 107962 [2021-06-12 21:40:34,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297 ImplicationChecksByTransitivity, 5382.7ms TimeCoverageRelationStatistics Valid=1509, Invalid=12063, Unknown=0, NotChecked=0, Total=13572 [2021-06-12 21:40:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107962 states. [2021-06-12 21:40:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107962 to 85866. [2021-06-12 21:40:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85866 states, 85865 states have (on average 3.0404006288941945) internal successors, (261064), 85865 states have internal predecessors, (261064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85866 states to 85866 states and 261064 transitions. [2021-06-12 21:40:35,668 INFO L78 Accepts]: Start accepts. Automaton has 85866 states and 261064 transitions. Word has length 56 [2021-06-12 21:40:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:40:35,669 INFO L482 AbstractCegarLoop]: Abstraction has 85866 states and 261064 transitions. [2021-06-12 21:40:35,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 85866 states and 261064 transitions. [2021-06-12 21:40:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:40:35,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:40:35,782 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:40:35,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-12 21:40:35,983 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:40:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:40:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2060786477, now seen corresponding path program 48 times [2021-06-12 21:40:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:40:35,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321482520] [2021-06-12 21:40:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:40:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:40:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:40:36,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:40:36,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321482520] [2021-06-12 21:40:36,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321482520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:36,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315769695] [2021-06-12 21:40:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:40:36,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:40:36,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:40:36,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:40:36,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:40:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:36,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:36,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:36,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:40:36,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:36,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:37,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:37,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:37,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:40:37,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:40:37,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:37,022 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:40:37,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:40:37,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:40:37,037 INFO L628 ElimStorePlain]: treesize reduction 9, result has 59.1 percent of original size [2021-06-12 21:40:37,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:40:37,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:13 [2021-06-12 21:40:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:40:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315769695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:40:37,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:40:37,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-12 21:40:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16430058] [2021-06-12 21:40:37,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:40:37,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:40:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:40:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:40:37,152 INFO L87 Difference]: Start difference. First operand 85866 states and 261064 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:40:37,966 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-12 21:40:48,359 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-12 21:40:56,261 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-12 21:40:58,445 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-12 21:41:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:22,462 INFO L93 Difference]: Finished difference Result 234053 states and 701084 transitions. [2021-06-12 21:41:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 645 states. [2021-06-12 21:41:22,462 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:41:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:22,877 INFO L225 Difference]: With dead ends: 234053 [2021-06-12 21:41:22,877 INFO L226 Difference]: Without dead ends: 232120 [2021-06-12 21:41:22,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 656 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208569 ImplicationChecksByTransitivity, 41283.1ms TimeCoverageRelationStatistics Valid=33140, Invalid=399166, Unknown=0, NotChecked=0, Total=432306 [2021-06-12 21:41:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232120 states. [2021-06-12 21:41:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232120 to 82891. [2021-06-12 21:41:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82891 states, 82890 states have (on average 3.0376161177464107) internal successors, (251788), 82890 states have internal predecessors, (251788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82891 states to 82891 states and 251788 transitions. [2021-06-12 21:41:25,721 INFO L78 Accepts]: Start accepts. Automaton has 82891 states and 251788 transitions. Word has length 56 [2021-06-12 21:41:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:25,721 INFO L482 AbstractCegarLoop]: Abstraction has 82891 states and 251788 transitions. [2021-06-12 21:41:25,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 82891 states and 251788 transitions. [2021-06-12 21:41:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:41:26,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:26,224 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:41:26,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:26,445 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:26,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1445569459, now seen corresponding path program 49 times [2021-06-12 21:41:26,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:26,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350987901] [2021-06-12 21:41:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:41:26,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:26,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350987901] [2021-06-12 21:41:26,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350987901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:26,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702973131] [2021-06-12 21:41:26,710 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 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 [2021-06-12 21:41:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:26,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:41:26,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:26,982 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:41:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:41:26,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:26,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:26,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:41:26,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:41:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:27,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702973131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:27,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:27,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 27 [2021-06-12 21:41:27,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793757590] [2021-06-12 21:41:27,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:41:27,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:27,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:41:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:41:27,035 INFO L87 Difference]: Start difference. First operand 82891 states and 251788 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:27,763 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 21:41:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:36,273 INFO L93 Difference]: Finished difference Result 151382 states and 454698 transitions. [2021-06-12 21:41:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-12 21:41:36,273 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:41:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:36,518 INFO L225 Difference]: With dead ends: 151382 [2021-06-12 21:41:36,518 INFO L226 Difference]: Without dead ends: 150425 [2021-06-12 21:41:36,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13541 ImplicationChecksByTransitivity, 6783.8ms TimeCoverageRelationStatistics Valid=5693, Invalid=27613, Unknown=0, NotChecked=0, Total=33306 [2021-06-12 21:41:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150425 states. [2021-06-12 21:41:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150425 to 88356. [2021-06-12 21:41:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88356 states, 88355 states have (on average 3.0369645181370606) internal successors, (268331), 88355 states have internal predecessors, (268331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88356 states to 88356 states and 268331 transitions. [2021-06-12 21:41:38,508 INFO L78 Accepts]: Start accepts. Automaton has 88356 states and 268331 transitions. Word has length 56 [2021-06-12 21:41:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:38,508 INFO L482 AbstractCegarLoop]: Abstraction has 88356 states and 268331 transitions. [2021-06-12 21:41:38,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 88356 states and 268331 transitions. [2021-06-12 21:41:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:41:38,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:38,948 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:41:39,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:41:39,162 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1007702601, now seen corresponding path program 50 times [2021-06-12 21:41:39,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:39,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885466863] [2021-06-12 21:41:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:41:39,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885466863] [2021-06-12 21:41:39,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885466863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181508722] [2021-06-12 21:41:39,409 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 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 [2021-06-12 21:41:39,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:41:39,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:41:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:39,769 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_131], 1=[v_prenex_129]} [2021-06-12 21:41:39,772 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 9 treesize of output 7 [2021-06-12 21:41:39,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:39,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:39,813 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 7 treesize of output 3 [2021-06-12 21:41:39,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:39,873 INFO L628 ElimStorePlain]: treesize reduction 33, result has 79.0 percent of original size [2021-06-12 21:41:39,877 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:41:39,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:41:39,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:39,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:39,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:41:39,905 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:173, output treesize:107 [2021-06-12 21:41:39,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:41:39,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:39,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:41:39,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:39,994 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:41:39,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:41:39,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:40,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:40,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:41:40,009 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:122, output treesize:38 [2021-06-12 21:41:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:40,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181508722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:40,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:40,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 21:41:40,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741099575] [2021-06-12 21:41:40,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:41:40,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:41:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:41:40,343 INFO L87 Difference]: Start difference. First operand 88356 states and 268331 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:48,628 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-12 21:41:50,057 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-12 21:41:50,231 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 21:41:50,794 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-12 21:41:51,005 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-12 21:41:51,147 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 21:41:51,293 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-12 21:41:51,881 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-12 21:41:52,477 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-12 21:41:52,796 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-12 21:41:52,963 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-12 21:41:54,175 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-12 21:41:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:41:54,694 INFO L93 Difference]: Finished difference Result 179810 states and 539423 transitions. [2021-06-12 21:41:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2021-06-12 21:41:54,694 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:41:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:41:54,981 INFO L225 Difference]: With dead ends: 179810 [2021-06-12 21:41:54,982 INFO L226 Difference]: Without dead ends: 177585 [2021-06-12 21:41:54,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22215 ImplicationChecksByTransitivity, 11816.9ms TimeCoverageRelationStatistics Valid=8379, Invalid=41573, Unknown=0, NotChecked=0, Total=49952 [2021-06-12 21:41:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177585 states. [2021-06-12 21:41:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177585 to 89177. [2021-06-12 21:41:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89177 states, 89176 states have (on average 3.035973804611106) internal successors, (270736), 89176 states have internal predecessors, (270736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89177 states to 89177 states and 270736 transitions. [2021-06-12 21:41:57,529 INFO L78 Accepts]: Start accepts. Automaton has 89177 states and 270736 transitions. Word has length 56 [2021-06-12 21:41:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:41:57,529 INFO L482 AbstractCegarLoop]: Abstraction has 89177 states and 270736 transitions. [2021-06-12 21:41:57,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:41:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 89177 states and 270736 transitions. [2021-06-12 21:41:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:41:57,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:41:57,647 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:41:57,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-12 21:41:57,848 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:41:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:41:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash 976675011, now seen corresponding path program 51 times [2021-06-12 21:41:57,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:41:57,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570836337] [2021-06-12 21:41:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:41:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:41:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:41:57,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:41:57,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570836337] [2021-06-12 21:41:57,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570836337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:57,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491312969] [2021-06-12 21:41:57,965 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 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 [2021-06-12 21:41:58,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:41:58,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:41:58,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:41:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:41:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-06-12 21:41:58,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:41:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:41:58,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:41:58,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:41:58,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:41:58,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:41:58,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:66, output treesize:13 [2021-06-12 21:41:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:41:58,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491312969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:41:58,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:41:58,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 21:41:58,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318872832] [2021-06-12 21:41:58,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:41:58,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:41:58,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:41:58,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:41:58,501 INFO L87 Difference]: Start difference. First operand 89177 states and 270736 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 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) [2021-06-12 21:42:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:01,672 INFO L93 Difference]: Finished difference Result 170857 states and 514759 transitions. [2021-06-12 21:42:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:42:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 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 56 [2021-06-12 21:42:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:01,985 INFO L225 Difference]: With dead ends: 170857 [2021-06-12 21:42:01,985 INFO L226 Difference]: Without dead ends: 170857 [2021-06-12 21:42:01,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 2169.7ms TimeCoverageRelationStatistics Valid=835, Invalid=3325, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:42:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170857 states. [2021-06-12 21:42:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170857 to 87664. [2021-06-12 21:42:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87664 states, 87663 states have (on average 3.0358760252329944) internal successors, (266134), 87663 states have internal predecessors, (266134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87664 states to 87664 states and 266134 transitions. [2021-06-12 21:42:04,248 INFO L78 Accepts]: Start accepts. Automaton has 87664 states and 266134 transitions. Word has length 56 [2021-06-12 21:42:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:04,248 INFO L482 AbstractCegarLoop]: Abstraction has 87664 states and 266134 transitions. [2021-06-12 21:42:04,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 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) [2021-06-12 21:42:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87664 states and 266134 transitions. [2021-06-12 21:42:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:42:04,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:04,368 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:42:04,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 21:42:04,569 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1653801429, now seen corresponding path program 52 times [2021-06-12 21:42:04,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:04,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775991914] [2021-06-12 21:42:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:05,000 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-12 21:42:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:42:05,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:05,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775991914] [2021-06-12 21:42:05,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775991914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:05,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756442084] [2021-06-12 21:42:05,284 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 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 [2021-06-12 21:42:05,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:42:05,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:05,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:42:05,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:05,418 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 21 treesize of output 13 [2021-06-12 21:42:05,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:05,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:05,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:05,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2021-06-12 21:42:05,957 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_136], 1=[q3], 6=[q1, v_prenex_135]} [2021-06-12 21:42:05,962 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 17 treesize of output 13 [2021-06-12 21:42:05,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:06,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:06,008 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 15 [2021-06-12 21:42:06,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:06,012 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 21 treesize of output 13 [2021-06-12 21:42:06,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:06,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:06,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:06,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:42:06,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:06,056 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:42:06,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:42:06,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:06,080 INFO L628 ElimStorePlain]: treesize reduction 44, result has 40.5 percent of original size [2021-06-12 21:42:06,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-12 21:42:06,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:42:06,081 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:167, output treesize:28 [2021-06-12 21:42:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:42:06,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756442084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:06,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:06,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-06-12 21:42:06,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317171176] [2021-06-12 21:42:06,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:42:06,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:06,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:42:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:42:06,296 INFO L87 Difference]: Start difference. First operand 87664 states and 266134 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 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) [2021-06-12 21:42:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:10,469 INFO L93 Difference]: Finished difference Result 110407 states and 332507 transitions. [2021-06-12 21:42:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 21:42:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 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 56 [2021-06-12 21:42:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:10,903 INFO L225 Difference]: With dead ends: 110407 [2021-06-12 21:42:10,904 INFO L226 Difference]: Without dead ends: 106033 [2021-06-12 21:42:10,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 3895.6ms TimeCoverageRelationStatistics Valid=1220, Invalid=6612, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 21:42:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106033 states. [2021-06-12 21:42:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106033 to 87561. [2021-06-12 21:42:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87561 states, 87560 states have (on average 3.035975331201462) internal successors, (265830), 87560 states have internal predecessors, (265830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87561 states to 87561 states and 265830 transitions. [2021-06-12 21:42:12,863 INFO L78 Accepts]: Start accepts. Automaton has 87561 states and 265830 transitions. Word has length 56 [2021-06-12 21:42:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:12,863 INFO L482 AbstractCegarLoop]: Abstraction has 87561 states and 265830 transitions. [2021-06-12 21:42:12,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 31 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) [2021-06-12 21:42:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 87561 states and 265830 transitions. [2021-06-12 21:42:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:42:12,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:12,981 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:42:13,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-12 21:42:13,184 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:13,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1999547327, now seen corresponding path program 53 times [2021-06-12 21:42:13,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:13,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144033340] [2021-06-12 21:42:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:42:13,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:13,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144033340] [2021-06-12 21:42:13,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144033340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:13,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127595565] [2021-06-12 21:42:13,399 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 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 [2021-06-12 21:42:13,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:42:13,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:13,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:42:13,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:13,892 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 17 treesize of output 13 [2021-06-12 21:42:13,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:13,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:13,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:13,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-12 21:42:14,366 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_141, v_prenex_144], 1=[q3], 3=[q1], 6=[v_prenex_145, v_prenex_139]} [2021-06-12 21:42:14,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 21:42:14,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:14,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:14,423 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 21 treesize of output 13 [2021-06-12 21:42:14,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:14,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:14,470 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:42:14,470 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 15 [2021-06-12 21:42:14,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:14,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:14,507 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 21:42:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-06-12 21:42:14,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:14,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:14,550 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:42:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2021-06-12 21:42:14,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:14,576 INFO L628 ElimStorePlain]: treesize reduction 44, result has 43.6 percent of original size [2021-06-12 21:42:14,576 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-06-12 21:42:14,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:42:14,577 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:171, output treesize:32 [2021-06-12 21:42:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:42:14,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127595565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:14,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:14,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-12 21:42:14,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695061897] [2021-06-12 21:42:14,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:42:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:42:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:42:14,628 INFO L87 Difference]: Start difference. First operand 87561 states and 265830 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 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) [2021-06-12 21:42:15,050 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-06-12 21:42:21,744 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-12 21:42:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:26,875 INFO L93 Difference]: Finished difference Result 113607 states and 341052 transitions. [2021-06-12 21:42:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-06-12 21:42:26,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 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 56 [2021-06-12 21:42:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:27,044 INFO L225 Difference]: With dead ends: 113607 [2021-06-12 21:42:27,044 INFO L226 Difference]: Without dead ends: 110336 [2021-06-12 21:42:27,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13401 ImplicationChecksByTransitivity, 10745.0ms TimeCoverageRelationStatistics Valid=5692, Invalid=29090, Unknown=0, NotChecked=0, Total=34782 [2021-06-12 21:42:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110336 states. [2021-06-12 21:42:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110336 to 88209. [2021-06-12 21:42:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88209 states, 88208 states have (on average 3.0359604571013965) internal successors, (267796), 88208 states have internal predecessors, (267796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88209 states to 88209 states and 267796 transitions. [2021-06-12 21:42:28,842 INFO L78 Accepts]: Start accepts. Automaton has 88209 states and 267796 transitions. Word has length 56 [2021-06-12 21:42:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:28,842 INFO L482 AbstractCegarLoop]: Abstraction has 88209 states and 267796 transitions. [2021-06-12 21:42:28,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 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) [2021-06-12 21:42:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 88209 states and 267796 transitions. [2021-06-12 21:42:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:42:28,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:28,959 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:42:29,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:42:29,160 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:29,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1303598751, now seen corresponding path program 54 times [2021-06-12 21:42:29,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:29,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532023827] [2021-06-12 21:42:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:29,708 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-06-12 21:42:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:42:30,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:30,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532023827] [2021-06-12 21:42:30,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532023827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:30,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110359776] [2021-06-12 21:42:30,177 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 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 [2021-06-12 21:42:30,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:42:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:42:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:42:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:30,656 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:42:30,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:42:30,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:30,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:30,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:42:30,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:42:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:42:30,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110359776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:30,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:30,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2021-06-12 21:42:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780252538] [2021-06-12 21:42:30,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:42:30,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:42:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:42:30,706 INFO L87 Difference]: Start difference. First operand 88209 states and 267796 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:31,072 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-12 21:42:33,834 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-12 21:42:42,112 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-12 21:42:45,457 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-12 21:42:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:42:45,588 INFO L93 Difference]: Finished difference Result 175451 states and 525686 transitions. [2021-06-12 21:42:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-06-12 21:42:45,589 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:42:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:42:45,885 INFO L225 Difference]: With dead ends: 175451 [2021-06-12 21:42:45,885 INFO L226 Difference]: Without dead ends: 175273 [2021-06-12 21:42:45,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16017 ImplicationChecksByTransitivity, 11310.7ms TimeCoverageRelationStatistics Valid=4864, Invalid=36956, Unknown=0, NotChecked=0, Total=41820 [2021-06-12 21:42:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175273 states. [2021-06-12 21:42:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175273 to 100237. [2021-06-12 21:42:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100237 states, 100236 states have (on average 3.030657647950836) internal successors, (303781), 100236 states have internal predecessors, (303781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100237 states to 100237 states and 303781 transitions. [2021-06-12 21:42:48,610 INFO L78 Accepts]: Start accepts. Automaton has 100237 states and 303781 transitions. Word has length 56 [2021-06-12 21:42:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:42:48,610 INFO L482 AbstractCegarLoop]: Abstraction has 100237 states and 303781 transitions. [2021-06-12 21:42:48,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 100237 states and 303781 transitions. [2021-06-12 21:42:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:42:48,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:42:48,749 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:42:48,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-12 21:42:48,952 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:42:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:42:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash -950109753, now seen corresponding path program 55 times [2021-06-12 21:42:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:42:48,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574226434] [2021-06-12 21:42:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:42:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:42:49,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:42:49,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574226434] [2021-06-12 21:42:49,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574226434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:49,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422904657] [2021-06-12 21:42:49,623 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 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 [2021-06-12 21:42:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:42:49,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:42:49,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:42:50,087 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 21:42:50,762 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-12 21:42:50,922 INFO L446 ElimStorePlain]: Different costs {1=[q3], 3=[q1], 6=[v_prenex_151], 10=[v_prenex_149]} [2021-06-12 21:42:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:50,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-12 21:42:50,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:50,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-12 21:42:50,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:50,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 21:42:50,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:50,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:42:50,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 21:42:50,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:50,954 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:42:50,954 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 36 treesize of output 20 [2021-06-12 21:42:50,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:51,051 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:42:51,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2021-06-12 21:42:51,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,183 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-12 21:42:51,184 INFO L628 ElimStorePlain]: treesize reduction 73, result has 78.7 percent of original size [2021-06-12 21:42:51,242 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:42:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 31 [2021-06-12 21:42:51,244 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,323 INFO L628 ElimStorePlain]: treesize reduction 77, result has 66.7 percent of original size [2021-06-12 21:42:51,327 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-12 21:42:51,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 34 [2021-06-12 21:42:51,329 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:51,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:42:51,354 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:483, output treesize:110 [2021-06-12 21:42:51,630 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:42:51,630 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 [2021-06-12 21:42:51,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,645 INFO L628 ElimStorePlain]: treesize reduction 26, result has 59.4 percent of original size [2021-06-12 21:42:51,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_153 vanished before elimination [2021-06-12 21:42:51,648 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:42:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-06-12 21:42:51,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:42:51,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:42:51,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:42:51,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:90, output treesize:10 [2021-06-12 21:42:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:42:51,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422904657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:42:51,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:42:51,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-06-12 21:42:51,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248478597] [2021-06-12 21:42:51,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:42:51,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:42:51,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:42:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:42:51,693 INFO L87 Difference]: Start difference. First operand 100237 states and 303781 transitions. Second operand has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:42:53,652 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-12 21:42:54,696 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-12 21:42:55,409 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-12 21:42:55,791 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-12 21:42:57,895 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-12 21:42:58,053 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 21:42:58,254 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-12 21:42:58,768 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-12 21:42:59,354 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 21:42:59,538 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-12 21:42:59,822 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-12 21:43:00,123 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-06-12 21:43:00,269 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-12 21:43:00,644 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-06-12 21:43:01,381 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-12 21:43:01,961 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2021-06-12 21:43:02,965 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-06-12 21:43:03,148 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-06-12 21:43:03,505 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-12 21:43:03,987 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-12 21:43:04,225 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-12 21:43:04,452 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-06-12 21:43:04,951 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 21:43:05,418 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2021-06-12 21:43:05,739 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-12 21:43:05,925 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-12 21:43:06,113 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-06-12 21:43:06,306 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-12 21:43:06,909 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2021-06-12 21:43:07,326 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-12 21:43:07,576 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-12 21:43:07,750 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-12 21:43:07,927 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2021-06-12 21:43:08,644 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-12 21:43:09,388 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-12 21:43:10,014 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-12 21:43:10,311 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 21:43:10,518 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-12 21:43:11,001 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-12 21:43:11,308 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-12 21:43:11,542 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-12 21:43:14,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:14,128 INFO L93 Difference]: Finished difference Result 195565 states and 584802 transitions. [2021-06-12 21:43:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-06-12 21:43:14,128 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:43:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:14,461 INFO L225 Difference]: With dead ends: 195565 [2021-06-12 21:43:14,461 INFO L226 Difference]: Without dead ends: 194276 [2021-06-12 21:43:14,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29871 ImplicationChecksByTransitivity, 18937.4ms TimeCoverageRelationStatistics Valid=8710, Invalid=59150, Unknown=0, NotChecked=0, Total=67860 [2021-06-12 21:43:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194276 states. [2021-06-12 21:43:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194276 to 100992. [2021-06-12 21:43:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100992 states, 100991 states have (on average 3.030626491469537) internal successors, (306066), 100991 states have internal predecessors, (306066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100992 states to 100992 states and 306066 transitions. [2021-06-12 21:43:17,500 INFO L78 Accepts]: Start accepts. Automaton has 100992 states and 306066 transitions. Word has length 56 [2021-06-12 21:43:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:17,500 INFO L482 AbstractCegarLoop]: Abstraction has 100992 states and 306066 transitions. [2021-06-12 21:43:17,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 100992 states and 306066 transitions. [2021-06-12 21:43:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:43:17,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:17,673 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-06-12 21:43:17,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-12 21:43:17,874 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2083983041, now seen corresponding path program 56 times [2021-06-12 21:43:17,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:17,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175141756] [2021-06-12 21:43:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:43:18,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:18,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175141756] [2021-06-12 21:43:18,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175141756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:18,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012041620] [2021-06-12 21:43:18,534 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 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 [2021-06-12 21:43:18,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:43:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:43:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:19,220 INFO L446 ElimStorePlain]: Different costs {0=[q3, v_prenex_161], 1=[v_prenex_163, v_prenex_157], 3=[v_prenex_159]} [2021-06-12 21:43:19,224 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 9 treesize of output 7 [2021-06-12 21:43:19,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:19,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:19,297 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 7 treesize of output 3 [2021-06-12 21:43:19,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:19,411 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-12 21:43:19,412 INFO L628 ElimStorePlain]: treesize reduction 40, result has 85.3 percent of original size [2021-06-12 21:43:19,417 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:43:19,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 5 [2021-06-12 21:43:19,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:19,504 INFO L628 ElimStorePlain]: treesize reduction 46, result has 79.1 percent of original size [2021-06-12 21:43:19,504 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-12 21:43:19,509 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:43:19,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 6 [2021-06-12 21:43:19,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:19,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:19,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:43:19,552 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:289, output treesize:150 [2021-06-12 21:43:19,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:43:19,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:43:19,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:43:19,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:19,656 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:43:19,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:43:19,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:19,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:19,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:43:19,671 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:122, output treesize:38 [2021-06-12 21:43:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:43:19,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012041620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:19,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:19,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2021-06-12 21:43:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336960143] [2021-06-12 21:43:19,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:43:19,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:19,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:43:19,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:43:19,778 INFO L87 Difference]: Start difference. First operand 100992 states and 306066 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:21,899 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 21:43:23,599 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-12 21:43:23,781 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 21:43:23,914 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 21:43:24,123 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-12 21:43:24,964 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-12 21:43:25,328 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-12 21:43:26,237 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-12 21:43:26,585 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-12 21:43:26,925 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-12 21:43:27,350 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-12 21:43:27,572 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-12 21:43:28,039 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2021-06-12 21:43:28,326 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-12 21:43:28,607 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-12 21:43:28,975 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-12 21:43:29,191 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-06-12 21:43:30,189 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-12 21:43:30,329 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-12 21:43:31,167 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-12 21:43:31,313 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-12 21:43:32,313 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-12 21:43:32,560 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-12 21:43:32,982 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 21:43:33,692 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-12 21:43:34,769 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-12 21:43:36,790 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-12 21:43:37,929 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-12 21:43:38,938 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 21:43:39,344 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-06-12 21:43:39,694 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-06-12 21:43:40,853 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-12 21:43:41,105 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-12 21:43:41,467 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-06-12 21:43:41,660 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-12 21:43:42,294 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-12 21:43:42,776 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-12 21:43:43,345 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-12 21:43:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:43:44,096 INFO L93 Difference]: Finished difference Result 153664 states and 460251 transitions. [2021-06-12 21:43:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-06-12 21:43:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 21:43:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:43:44,362 INFO L225 Difference]: With dead ends: 153664 [2021-06-12 21:43:44,362 INFO L226 Difference]: Without dead ends: 153513 [2021-06-12 21:43:44,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39684 ImplicationChecksByTransitivity, 21896.7ms TimeCoverageRelationStatistics Valid=9396, Invalid=82716, Unknown=0, NotChecked=0, Total=92112 [2021-06-12 21:43:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153513 states. [2021-06-12 21:43:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153513 to 101262. [2021-06-12 21:43:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101262 states, 101261 states have (on average 3.0316706333139116) internal successors, (306990), 101261 states have internal predecessors, (306990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101262 states to 101262 states and 306990 transitions. [2021-06-12 21:43:46,867 INFO L78 Accepts]: Start accepts. Automaton has 101262 states and 306990 transitions. Word has length 56 [2021-06-12 21:43:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:43:46,867 INFO L482 AbstractCegarLoop]: Abstraction has 101262 states and 306990 transitions. [2021-06-12 21:43:46,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:43:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 101262 states and 306990 transitions. [2021-06-12 21:43:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:43:47,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:43:47,020 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-06-12 21:43:47,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:43:47,221 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:43:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:43:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 841396681, now seen corresponding path program 57 times [2021-06-12 21:43:47,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:43:47,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421380142] [2021-06-12 21:43:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:43:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:43:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:43:47,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:43:47,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421380142] [2021-06-12 21:43:47,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421380142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:47,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183547161] [2021-06-12 21:43:47,427 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 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 [2021-06-12 21:43:47,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 21:43:47,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:43:47,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:43:47,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:43:47,938 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:43:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:43:47,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:43:47,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:43:47,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:43:47,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:43:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 21:43:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183547161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:43:47,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:43:47,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2021-06-12 21:43:47,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523347096] [2021-06-12 21:43:47,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:43:47,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:43:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:43:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:43:47,986 INFO L87 Difference]: Start difference. First operand 101262 states and 306990 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 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) [2021-06-12 21:44:00,157 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-12 21:44:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:01,373 INFO L93 Difference]: Finished difference Result 280650 states and 841868 transitions. [2021-06-12 21:44:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2021-06-12 21:44:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 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 58 [2021-06-12 21:44:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:01,951 INFO L225 Difference]: With dead ends: 280650 [2021-06-12 21:44:01,951 INFO L226 Difference]: Without dead ends: 279584 [2021-06-12 21:44:01,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42473 ImplicationChecksByTransitivity, 9685.3ms TimeCoverageRelationStatistics Valid=10285, Invalid=84271, Unknown=0, NotChecked=0, Total=94556 [2021-06-12 21:44:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279584 states. [2021-06-12 21:44:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279584 to 108104. [2021-06-12 21:44:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108104 states, 108103 states have (on average 3.028750358454437) internal successors, (327417), 108103 states have internal predecessors, (327417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108104 states to 108104 states and 327417 transitions. [2021-06-12 21:44:05,585 INFO L78 Accepts]: Start accepts. Automaton has 108104 states and 327417 transitions. Word has length 58 [2021-06-12 21:44:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:05,586 INFO L482 AbstractCegarLoop]: Abstraction has 108104 states and 327417 transitions. [2021-06-12 21:44:05,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 23 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) [2021-06-12 21:44:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 108104 states and 327417 transitions. [2021-06-12 21:44:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:44:06,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:06,006 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-06-12 21:44:06,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:06,230 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1222967297, now seen corresponding path program 58 times [2021-06-12 21:44:06,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:06,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822036877] [2021-06-12 21:44:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 21:44:06,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:06,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822036877] [2021-06-12 21:44:06,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822036877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:06,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227956152] [2021-06-12 21:44:06,340 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 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 [2021-06-12 21:44:06,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:44:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:44:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:06,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:06,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:06,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 21:44:06,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:06,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:06,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:06,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-12 21:44:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 21:44:06,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227956152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:06,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:06,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:44:06,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215685646] [2021-06-12 21:44:06,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:44:06,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:44:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:44:06,763 INFO L87 Difference]: Start difference. First operand 108104 states and 327417 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:08,015 INFO L93 Difference]: Finished difference Result 146539 states and 441815 transitions. [2021-06-12 21:44:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:44:08,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-12 21:44:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:08,259 INFO L225 Difference]: With dead ends: 146539 [2021-06-12 21:44:08,259 INFO L226 Difference]: Without dead ends: 146539 [2021-06-12 21:44:08,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:44:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146539 states. [2021-06-12 21:44:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146539 to 107384. [2021-06-12 21:44:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107384 states, 107383 states have (on average 3.028775504502575) internal successors, (325239), 107383 states have internal predecessors, (325239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107384 states to 107384 states and 325239 transitions. [2021-06-12 21:44:10,645 INFO L78 Accepts]: Start accepts. Automaton has 107384 states and 325239 transitions. Word has length 58 [2021-06-12 21:44:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:10,645 INFO L482 AbstractCegarLoop]: Abstraction has 107384 states and 325239 transitions. [2021-06-12 21:44:10,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 107384 states and 325239 transitions. [2021-06-12 21:44:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:44:11,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:11,227 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-06-12 21:44:11,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:11,428 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:11,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1895291265, now seen corresponding path program 59 times [2021-06-12 21:44:11,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:11,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053107344] [2021-06-12 21:44:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:44:11,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:11,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053107344] [2021-06-12 21:44:11,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053107344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:11,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799831166] [2021-06-12 21:44:11,546 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 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 [2021-06-12 21:44:11,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:44:11,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:11,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:44:11,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:11,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:11,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:11,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 21:44:11,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:11,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:11,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:11,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-12 21:44:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:44:11,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799831166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:11,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:11,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:44:11,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401828163] [2021-06-12 21:44:11,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:44:11,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:44:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:44:11,871 INFO L87 Difference]: Start difference. First operand 107384 states and 325239 transitions. Second operand has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 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) [2021-06-12 21:44:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:13,147 INFO L93 Difference]: Finished difference Result 163977 states and 495737 transitions. [2021-06-12 21:44:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:44:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 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 58 [2021-06-12 21:44:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:13,673 INFO L225 Difference]: With dead ends: 163977 [2021-06-12 21:44:13,673 INFO L226 Difference]: Without dead ends: 163977 [2021-06-12 21:44:13,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=425, Invalid=1555, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:44:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163977 states. [2021-06-12 21:44:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163977 to 111759. [2021-06-12 21:44:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111759 states, 111758 states have (on average 3.0281769537751213) internal successors, (338423), 111758 states have internal predecessors, (338423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111759 states to 111759 states and 338423 transitions. [2021-06-12 21:44:16,010 INFO L78 Accepts]: Start accepts. Automaton has 111759 states and 338423 transitions. Word has length 58 [2021-06-12 21:44:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:16,010 INFO L482 AbstractCegarLoop]: Abstraction has 111759 states and 338423 transitions. [2021-06-12 21:44:16,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 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) [2021-06-12 21:44:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 111759 states and 338423 transitions. [2021-06-12 21:44:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:44:16,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:16,174 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-06-12 21:44:16,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-12 21:44:16,377 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1075319171, now seen corresponding path program 60 times [2021-06-12 21:44:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:16,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322891604] [2021-06-12 21:44:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:44:17,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:17,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322891604] [2021-06-12 21:44:17,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322891604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:17,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400734301] [2021-06-12 21:44:17,536 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 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 [2021-06-12 21:44:17,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:44:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:44:17,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:17,998 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:44:17,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:44:17,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:18,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:18,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:18,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-12 21:44:18,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:44:18,080 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:44:18,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:18,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:18,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:18,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:44:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:44:18,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400734301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:18,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:18,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 42 [2021-06-12 21:44:18,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231748707] [2021-06-12 21:44:18,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 21:44:18,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 21:44:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:44:18,253 INFO L87 Difference]: Start difference. First operand 111759 states and 338423 transitions. Second operand has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:36,864 INFO L93 Difference]: Finished difference Result 264126 states and 795381 transitions. [2021-06-12 21:44:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2021-06-12 21:44:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-12 21:44:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:37,761 INFO L225 Difference]: With dead ends: 264126 [2021-06-12 21:44:37,761 INFO L226 Difference]: Without dead ends: 263139 [2021-06-12 21:44:37,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53310 ImplicationChecksByTransitivity, 16271.9ms TimeCoverageRelationStatistics Valid=13949, Invalid=101991, Unknown=0, NotChecked=0, Total=115940 [2021-06-12 21:44:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263139 states. [2021-06-12 21:44:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263139 to 121290. [2021-06-12 21:44:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121290 states, 121289 states have (on average 3.028906166264047) internal successors, (367373), 121289 states have internal predecessors, (367373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121290 states to 121290 states and 367373 transitions. [2021-06-12 21:44:41,256 INFO L78 Accepts]: Start accepts. Automaton has 121290 states and 367373 transitions. Word has length 58 [2021-06-12 21:44:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:41,256 INFO L482 AbstractCegarLoop]: Abstraction has 121290 states and 367373 transitions. [2021-06-12 21:44:41,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 121290 states and 367373 transitions. [2021-06-12 21:44:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:44:41,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:41,887 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-06-12 21:44:42,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:44:42,121 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash -321303673, now seen corresponding path program 61 times [2021-06-12 21:44:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:42,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260629100] [2021-06-12 21:44:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:44:42,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:42,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260629100] [2021-06-12 21:44:42,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260629100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:42,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220948293] [2021-06-12 21:44:42,281 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 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 [2021-06-12 21:44:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:44:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:42,689 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:44:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-12 21:44:42,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:42,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:42,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:42,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:48 [2021-06-12 21:44:42,986 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-12 21:44:43,141 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-12 21:44:43,297 INFO L446 ElimStorePlain]: Different costs {1=[q3, v_prenex_171, v_prenex_167], 6=[q1], 10=[v_prenex_170, v_prenex_166]} [2021-06-12 21:44:43,307 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:44:43,307 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 40 treesize of output 24 [2021-06-12 21:44:43,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,504 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-12 21:44:43,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:43,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:44:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-06-12 21:44:43,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,519 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:44:43,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-12 21:44:43,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:43,589 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 21:44:43,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-12 21:44:43,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:43,648 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:44:43,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 21 [2021-06-12 21:44:43,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,716 INFO L628 ElimStorePlain]: treesize reduction 51, result has 70.7 percent of original size [2021-06-12 21:44:43,721 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-12 21:44:43,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 21 [2021-06-12 21:44:43,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:43,748 INFO L628 ElimStorePlain]: treesize reduction 51, result has 40.7 percent of original size [2021-06-12 21:44:43,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-12 21:44:43,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:44:43,749 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:305, output treesize:31 [2021-06-12 21:44:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:44:43,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220948293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:43,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:43,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 32 [2021-06-12 21:44:43,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657159299] [2021-06-12 21:44:43,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:44:43,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:44:43,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:44:43,837 INFO L87 Difference]: Start difference. First operand 121290 states and 367373 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:49,607 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 21:44:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:50,300 INFO L93 Difference]: Finished difference Result 211726 states and 639910 transitions. [2021-06-12 21:44:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-12 21:44:50,301 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-12 21:44:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:50,711 INFO L225 Difference]: With dead ends: 211726 [2021-06-12 21:44:50,712 INFO L226 Difference]: Without dead ends: 207952 [2021-06-12 21:44:50,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6137 ImplicationChecksByTransitivity, 4350.5ms TimeCoverageRelationStatistics Valid=2145, Invalid=14625, Unknown=0, NotChecked=0, Total=16770 [2021-06-12 21:44:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207952 states. [2021-06-12 21:44:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207952 to 124431. [2021-06-12 21:44:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124431 states, 124430 states have (on average 3.0311339709073373) internal successors, (377164), 124430 states have internal predecessors, (377164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124431 states to 124431 states and 377164 transitions. [2021-06-12 21:44:53,994 INFO L78 Accepts]: Start accepts. Automaton has 124431 states and 377164 transitions. Word has length 58 [2021-06-12 21:44:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:44:53,994 INFO L482 AbstractCegarLoop]: Abstraction has 124431 states and 377164 transitions. [2021-06-12 21:44:53,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 124431 states and 377164 transitions. [2021-06-12 21:44:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:44:54,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:44:54,198 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-06-12 21:44:54,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-06-12 21:44:54,399 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:44:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:44:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 66159645, now seen corresponding path program 62 times [2021-06-12 21:44:54,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:44:54,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745043243] [2021-06-12 21:44:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:44:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:44:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:44:54,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:44:54,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745043243] [2021-06-12 21:44:54,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745043243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:54,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99938234] [2021-06-12 21:44:54,482 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 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 [2021-06-12 21:44:54,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:44:54,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:44:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:44:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:44:54,692 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:44:54,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:44:54,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:44:54,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:44:54,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:44:54,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:44:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:44:54,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99938234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:44:54,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:44:54,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 21:44:54,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496965240] [2021-06-12 21:44:54,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:44:54,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:44:54,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:44:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:44:54,724 INFO L87 Difference]: Start difference. First operand 124431 states and 377164 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:44:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:44:56,687 INFO L93 Difference]: Finished difference Result 253327 states and 771814 transitions. [2021-06-12 21:44:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:44:56,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-12 21:44:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:44:57,563 INFO L225 Difference]: With dead ends: 253327 [2021-06-12 21:44:57,564 INFO L226 Difference]: Without dead ends: 253327 [2021-06-12 21:44:57,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 377.8ms TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:44:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253327 states. [2021-06-12 21:45:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253327 to 161233. [2021-06-12 21:45:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161233 states, 161232 states have (on average 3.0270541827924977) internal successors, (488058), 161232 states have internal predecessors, (488058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161233 states to 161233 states and 488058 transitions. [2021-06-12 21:45:01,603 INFO L78 Accepts]: Start accepts. Automaton has 161233 states and 488058 transitions. Word has length 58 [2021-06-12 21:45:01,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:45:01,603 INFO L482 AbstractCegarLoop]: Abstraction has 161233 states and 488058 transitions. [2021-06-12 21:45:01,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:45:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 161233 states and 488058 transitions. [2021-06-12 21:45:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:45:02,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:45:02,359 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-06-12 21:45:02,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:02,562 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:45:02,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:45:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1915394303, now seen corresponding path program 63 times [2021-06-12 21:45:02,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:45:02,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439154659] [2021-06-12 21:45:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:45:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:45:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:45:02,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:45:02,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439154659] [2021-06-12 21:45:02,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439154659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:02,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284662544] [2021-06-12 21:45:02,652 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 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 [2021-06-12 21:45:02,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:45:02,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:45:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:45:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:45:02,920 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:45:02,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:45:02,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:45:02,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:45:02,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:45:02,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-12 21:45:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:45:02,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284662544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:45:02,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:45:02,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:45:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060155227] [2021-06-12 21:45:02,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:45:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:45:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:45:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:45:02,947 INFO L87 Difference]: Start difference. First operand 161233 states and 488058 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 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) Received shutdown request... [2021-06-12 21:45:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:45:04,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:45:04,989 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:45:04,991 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:45:04,992 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:45:04,993 INFO L202 PluginConnector]: Adding new model ring-nondet.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:45:04 BasicIcfg [2021-06-12 21:45:04,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:45:04,993 INFO L168 Benchmark]: Toolchain (without parser) took 685152.33 ms. Allocated memory was 180.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 159.9 MB in the beginning and 6.2 GB in the end (delta: -6.0 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-06-12 21:45:04,993 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:45:04,993 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.11 ms. Allocated memory is still 180.4 MB. Free memory was 159.8 MB in the beginning and 158.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:04,993 INFO L168 Benchmark]: Boogie Preprocessor took 26.28 ms. Allocated memory is still 180.4 MB. Free memory was 158.3 MB in the beginning and 157.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:04,993 INFO L168 Benchmark]: RCFGBuilder took 389.72 ms. Allocated memory is still 180.4 MB. Free memory was 157.1 MB in the beginning and 137.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-06-12 21:45:04,994 INFO L168 Benchmark]: TraceAbstraction took 684701.50 ms. Allocated memory was 180.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 137.4 MB in the beginning and 6.2 GB in the end (delta: -6.1 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-06-12 21:45:04,994 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 180.4 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.11 ms. Allocated memory is still 180.4 MB. Free memory was 159.8 MB in the beginning and 158.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.28 ms. Allocated memory is still 180.4 MB. Free memory was 158.3 MB in the beginning and 157.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 389.72 ms. Allocated memory is still 180.4 MB. Free memory was 157.1 MB in the beginning and 137.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 684701.50 ms. Allocated memory was 180.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 137.4 MB in the beginning and 6.2 GB in the end (delta: -6.1 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (161233states) and FLOYD_HOARE automaton (currently 28 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (224503 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 684623.8ms, OverallIterations: 66, TraceHistogramMax: 6, EmptinessCheckTime: 8626.2ms, AutomataDifference: 503249.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9668 SDtfs, 52021 SDslu, 133982 SDs, 0 SdLazy, 175716 SolverSat, 13200 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79074.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11721 GetRequests, 2617 SyntacticMatches, 12 SemanticMatches, 9092 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870038 ImplicationChecksByTransitivity, 399656.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=161233occurred in iteration=65, InterpolantAutomatonStates: 8322, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 95244.5ms AutomataMinimizationTime, 65 MinimizatonAttempts, 2767576 StatesRemovedByMinimization, 62 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 700.8ms SsaConstructionTime, 2749.2ms SatisfiabilityAnalysisTime, 59148.5ms InterpolantComputationTime, 6599 NumberOfCodeBlocks, 6599 NumberOfCodeBlocksAsserted, 304 NumberOfCheckSat, 6471 ConstructedInterpolants, 54 QuantifiedInterpolants, 112140 SizeOfPredicates, 608 NumberOfNonLiveVariables, 8392 ConjunctsInSsa, 1415 ConjunctsInUnsatCore, 128 InterpolantComputations, 4 PerfectInterpolantSequences, 1197/6498 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